SCAG POWER EQUIPMENT STTII-52V-31BV Rippeon Equipment Co Maryland Instruction Manual

: June 1, 2024
: SCAG POWER EQUIPMENT

Table of Contents

STTII-52V-31BV Rippeon Equipment Co Maryland
Specifications
Product Usage Instructions
Section 1 – General Information
Section 2 – Safety Information
Section 4 – Operating Instructions
Section 5 – Troubleshooting Cutting Conditions
Section 6 – Adjustments
Section 7 – Maintenance
Section 8 – Illustrated Parts List
- FAQ
Q: How often should I sharpen the mower blades?
Q: What type of fuel should I use for my Scag mower?
Q: Can I wash my mower with a pressure washer?

STTII-52V-31BV Rippeon Equipment Co Maryland

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Specifications

The Scag mower models covered in this manual are as follows:

STTII-52V-25CH-LP-EFI
STTII-52V-31BV
STTII-61V-25CH-LP-EFI
STTII-61V-25KBD
STTII-61V-31BV
STTII-61V-31DFI
STTII-61V-40BV-EFI
STTII-72V-25KBD
STTII-72V-31DFI
STTII-72V-40BV-EFI

Product Usage Instructions

Section 1 – General Information

This section provides an overview of the Scag mower models
covered in the manual.

Section 2 – Safety Information

Read and understand all safety information provided in this
section before operating the mower.

Section 4 – Operating Instructions

1. Before starting the mower, ensure all safety features are in
place and functioning properly.

2. Start the engine according to the manufacturer’s
instructions.

3. Engage the blades carefully and adjust cutting height as
needed.

4. Operate the mower in a smooth and controlled manner, avoiding
sudden movements.

Section 5 – Troubleshooting Cutting Conditions

If you encounter cutting issues, refer to this section for
guidance on troubleshooting and resolving common problems.

Section 6 – Adjustments

Learn how to make adjustments to the mower for optimal
performance and cutting results.

Section 7 – Maintenance

Regular maintenance is essential for keeping your Scag mower in
top condition. Follow the maintenance schedule provided in this
section.

Section 8 – Illustrated Parts List

Refer to the illustrated parts list when ordering replacement
parts for your Scag mower.

FAQ

Q: How often should I sharpen the mower blades?

A: It is recommended to sharpen the blades at least once a
mowing season or more frequently if you notice a decrease in
cutting performance.

Q: What type of fuel should I use for my Scag mower?

A: Use unleaded gasoline with an octane rating of 87 or higher.
Avoid using E85 or diesel fuel.

Q: Can I wash my mower with a pressure washer?

A: It is not recommended to use a pressure washer as it may
damage the mower components. Use a garden hose instead for
cleaning.

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OPERATOR’S MANUAL

Models:

STTII-52V-25CH-LP-EFI STTII-52V-31BV STTII-61V-25CH-LP-EFI STTII-61V-25KBD STTII-61V-31BV STTII-61V-31DFI STTII-61V-40BV-EFI STTII-72V-25KBD STTII-72V- 31DFI STTII-72V-40BV-EFI

Congratulations on owning a Scag mower! This manual contains the operating instructions and safety information for your Scag mower. Reading this manual can provide you with assistance in maintenance and adjustment procedures to keep your mower performing to maximum efficiency. The specific models that this book covers are listed on the inside cover. Before operating your machine, please read all the information enclosed.

PART NO. 03488 PRINTED 9/2021 PRINTED IN USA

WARNING

FAILURE TO FOLLOW SAFE OPERATING PRACTICES MAY RESULT IN SERIOUS INJURY OR DEATH.
· Read this manual completely as well as other manuals that came with your mower. · DO NOT operate on steep slopes. To check a slope, attempt to back up it (with the cutter deck
down). If the machine can back up the slope without the wheels slipping, reduce speed and use extreme caution. · Under no circumstances should the machine be operated on slopes greater than 15 degrees. ALWAYS FOLLOW OSHA APPROVED OPERATION. · Stay two cut widths away from slopes, drop offs, ditches, water and retaining walls. · DO NOT mow on wet grass. Wet grass reduces traction and steering control. · Keep all shields in place, especially the grass discharge chute. · Before performing any maintenance or service, stop the machine and remove the spark plug wire and ignition key. · If a mechanism becomes clogged, stop the engine before cleaning. · Keep hands, feet and clothing away from power-driven parts. · Keep others off the mower (only one person at a time)
REMEMBER – YOUR MOWER IS ONLY AS SAFE AS THE OPERATOR!
HAZARD CONTROL AND ACCIDENT PREVENTION ARE DEPENDENT UPON THE AWARENESS, CONCERN, PRUDENCE, AND PROPER TRAINING OF THE PERSONNEL INVOLVED IN THE OPERATION, TRANSPORT, MAINTENANCE, AND STORAGE OF THE EQUIPMENT.

This manual covers the operating instructions and illustrated parts list for:

STTII-52V-25CH-LP-EFI

with a serial number of

S8700001 to S8799999

STTII-52V-31BV

with a serial number of

S8800001 to S8899999

STTII-61V-25CH-LP-EFI

with a serial number of

S8900001 to S8999999

STTII-61V-25KBD

with a serial number of

S9000001 to S9099999

STTII-61V-31BV

with a serial number of

S9100001 to S9199999

STTII-61V-31DFI

with a serial number of

S9200001 to S9299999

STTII-61V-40BV-EFI

with a serial number of

T3500001 to T3599999

STTII-72V-25KBD

with a serial number of

S9400001 to S9499999

STTII-72V-31DFI

with a serial number of

S9500001 to S9599999

STTII-72V-40BV-EFI

with a serial number of

T3600001 to T3699999

Always use the entire serial number listed on the serial number tag when referring to this product.

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Table of Contents
SECTION 1 – GENERAL INFORMATION………………………………………………………………………………………………………………1
1.1 INTRODUCTION…………………………………………………………………………………………………………………………………………………………………………1 1.2 DIRECTION REFERENCE……………………………………………………………………………………………………………………………………………………………1 1.3 SERVICING THE ENGINE AND DRIVE TRAIN COMPONENTS ……………………………………………………………………………………………..1 1.4 SYMBOLS…………………………………………………………………………………………………………………………………………………………………………………….2
SECTION 2 – SAFETY INFORMATION ………………………………………………………………………………………………………………… 3
2.1 INTRODUCTION…………………………………………………………………………………………………………………………………………………………………………3 2.2 SIGNAL WORDS …………………………………………………………………………………………………………………………………………………………………………3 2.3 BEFORE OPERATION CONSIDERATIONS……………………………………………………………………………………………………………………………….3 2.4 TESTING THE SAFETY INTERLOCK SYSTEM ………………………………………………………………………………………………………………………….4 2.5 OPERATION CONSIDERATIONS ………………………………………………………………………………………………………………………………………………5 2.6 ROLL-OVER PROTECTION SYSTEM ………………………………………………………………………………………………………………………………………..6 2.7 MAINTENANCE CONSIDERATIONS & STORAGE ………………………………………………………………………………………………………………….9 2.8 USING A SPARK ARRESTOR ……………………………………………………………………………………………………………………………………………………..9 2.9 SPARK IGNITION SYSTEM…………………………………………………………………………………………………………………………………………………………9 2.10 SAFETY AND INSTRUCTIONAL DECALS………………………………………………………………………………………………………………………….. 10
SECTION 3 – SPECIFICATIONS …………………………………………………………………………………………………………………………. 11
3.1 ENGINE…………………………………………………………………………………………………………………………………………………………………………………….. 11 3.2 ELECTRICAL…………………………………………………………………………………………………………………………………………………………………………….. 12 3.3 POWER HEAD …………………………………………………………………………………………………………………………………………………………………………. 12 3.4 CUTTER DECK…………………………………………………………………………………………………………………………………………………………………………. 13 3.5 HYDRAULIC SYSTEM……………………………………………………………………………………………………………………………………………………………… 13 3.6 WEIGHTS AND DIMENSIONS……………………………………………………………………………………………………………………………………………….. 13 3.7 PRODUCTIVITY ………………………………………………………………………………………………………………………………………………………………………. 13
SECTION 4 – OPERATING INSTRUCTIONS ……………………………………………………………………………………………………… 14
4.1 TIGER EYE INSTRUMENT IDENTIFICATION………………………………………………………………………………………………………………………… 14 4.2 CONTROLS IDENTIFICATION ……………………………………………………………………………………………………………………………………………….. 16 4.3 SAFETY INTERLOCK SYSTEM……………………………………………………………………………………………………………………………………………….. 17 4.4 TESTING THE SAFETY INTERLOCK SYSTEM ………………………………………………………………………………………………………………………. 17 4.5 INITIAL RUN-IN PROCEDURES …………………………………………………………………………………………………………………………………………….. 18 4.6 STARTING THE ENGINE …………………………………………………………………………………………………………………………………………………………. 18 4.7 GROUND TRAVEL AND STEERING ………………………………………………………………………………………………………………………………………. 18 4.8 ENGAGING THE DECK DRIVE (CUTTER BLADES) ……………………………………………………………………………………………………………… 19 4.9 HILLSIDE OPERATION……………………………………………………………………………………………………………………………………………………………. 20 4.10 PARKING THE MOWER ………………………………………………………………………………………………………………………………………………………… 20 4.11 AFTER OPERATION………………………………………………………………………………………………………………………………………………………………. 20 4.12 REMOVING CLOGGED MATERIAL……………………………………………………………………………………………………………………………………… 20 4.13 MOVING MOWER WITH ENGINE STOPPED …………………………………………………………………………………………………………………….. 21 4.14 RECOMMENDATIONS FOR MOWING ………………………………………………………………………………………………………………………………. 21
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4.15 ADJUSTING CUTTING HEIGHT ………………………………………………………………………………………………………………………………………….. 21 4.16 ADJUSTING THE STEERING LEVERS …………………………………………………………………………………………………………………………………. 22 4.17 ADJUSTING THE HEIGHT ADJUST PEDAL……………………………………………………………………………………………………………………….. 22 4.18 TOWING (OPTIONAL HITCH ACCESSORY) ………………………………………………………………………………………………………………………. 23
SECTION 5 – TROUBLESHOOTING CUTTING CONDITIONS…………………………………………………………………………. 24
SECTION 6 – ADJUSTMENTS……………………………………………………………………………………………………………………………. 27
6.1 TRAVEL ADJUSTMENTS ………………………………………………………………………………………………………………………………………………………… 28 6.2 THROTTLE CONTROL AND CHOKE ADJUSTMENTS ………………………………………………………………………………………………………… 29 6.3 BELT ADJUSTMENT………………………………………………………………………………………………………………………………………………………………… 29 6.4 BELT ALIGNMENT…………………………………………………………………………………………………………………………………………………………………… 30 6.5 CUTTER DECK ADJUSTMENTS…………………………………………………………………………………………………………………………………………….. 30 6.6 CUSTOM-CUT BAFFLE ADJUSTMENT ………………………………………………………………………………………………………………………………… 32 6.7 ELECTRIC CLUTCH ADJUSTMENT……………………………………………………………………………………………………………………………………….. 33
SECTION 7 – MAINTENANCE …………………………………………………………………………………………………………………………… 34
7.1 MAINTENANCE CHART – RECOMMENDED SERVICE INTERVALS ………………………………………………………………………………….. 34 7.2 LUBRICATION………………………………………………………………………………………………………………………………………………………………………….. 35 7.3 HYDRAULIC SYSTEM……………………………………………………………………………………………………………………………………………………………… 37 7.4 ENGINE OIL……………………………………………………………………………………………………………………………………………………………………………… 38 7.5 ENGINE FUEL SYSTEM (GASOLINE & DIESEL MODELS)………………………………………………………………………………………………….. 38 7.6 LPG ENGINE FUEL SYSTEM ………………………………………………………………………………………………………………………………………………….. 40 7.7 ENGINE AIR CLEANER……………………………………………………………………………………………………………………………………………………………. 40 7.8 BATTERY ………………………………………………………………………………………………………………………………………………………………………………….. 41 7.9 DRIVE BELTS ……………………………………………………………………………………………………………………………………………………………………………. 41 7.10 CUTTER BLADES ………………………………………………………………………………………………………………………………………………………………….. 42 7.11 TIRES ………………………………………………………………………………………………………………………………………………………………………………………. 43 7.12 CUTTER DECK GEARBOX ……………………………………………………………………………………………………………………………………………………. 44 7.13 COOLING SYSTEM ……………………………………………………………………………………………………………………………………………………………….. 44 7.14 BODY, DECK, AND UPHOLSTERY………………………………………………………………………………………………………………………………………. 45
SECTION 8 – ILLUSTRATED PARTS LIST ………………………………………………………………………………………………………….. 46
8.1 SCAG APPROVED ATTACHMENTS AND ACCESSORIES…………………………………………………………………………………………………… 46 STTII 52V CUTTER DECK ……………………………………………………………………………………………………………………………………………………………… 48 STTII 61V & 72V CUTTER DECKS………………………………………………………………………………………………………………………………………………… 50 STTII CUTTER DECK CONTROLS………………………………………………………………………………………………………………………………………………… 52 STTII SHEET METAL COMPONENTS ………………………………………………………………………………………………………………………………………….. 54 STTII ROLL-OVER PROTECTION SYSTEM …………………………………………………………………………………………………………………………………. 56 STTII SUSPENSION SEAT …………………………………………………………………………………………………………………………………………………………….. 58 STTII DECK DRIVE COMPONENTS …………………………………………………………………………………………………………………………………………….. 60 STTII ENGINE AND ATTACHING PARTS – AIR COOLED ( GASOLINE)…………………………………………………………………………………… 62 STTII ENGINE & ATTACHING PARTS – LIQUID COOLED (GASOLINE)…………………………………………………………………………………… 64
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Table of Contents R STTII ENGINE & ATTACHING PARTS – KOHLER 25CH-LP-EFI ………………………………………………………………………………………………… 66 STTII ENGINE & ATTACHING PARTS – KUBOTA DIESEL ………………………………………………………………………………………………………….. 68 STTII BRAKE COMPONENTS……………………………………………………………………………………………………………………………………………………….. 70 STTII STEERING COMPONENTS …………………………………………………………………………………………………………………………………………………. 72 STTII HYDRAULIC SYSTEM – DUAL CORE COOLER ………………………………………………………………………………………………………………… 74 STTII HYDRAULIC SYSTEM – SINGLE CORE COOLER ……………………………………………………………………………………………………………… 76 STTII FUEL SYSTEM – GASOLINE ENGINES………………………………………………………………………………………………………………………………. 78 STTII FUEL SYSTEM – KOHLER 25CH-LP- EFI…………………………………………………………………………………………………………………………….. 80 STTII FUEL SYSTEM – KUBOTA DIESEL ……………………………………………………………………………………………………………………………………… 82 BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN …………………………………………………………………………………………… 84 STTII ELECTRICAL SYSTEM – GASOLINE & LP ENGINES ………………………………………………………………………………………………………… 86 STTII ELECTRICAL SYSTEM – KUBOTA DIESEL…………………………………………………………………………………………………………………………. 88 REPLACEMENT DECALS AND INFORMATION PLATES ………………………………………………………………………………………………………….. 90 ELECTRICAL SCHEMATIC – KOHLER EFI (LP)……………………………………………………………………………………………………………………………. 92 ELECTRICAL SCHEMATIC – KUBOTA 25KBD…………………………………………………………………………………………………………………………….. 93 ELECTRICAL SCHEMATIC – KAWASAKI 31DFI………………………………………………………………………………………………………………………….. 94 ELECTRICAL SCHEMATIC – BRIGGS & STRATTON 31BV…………………………………………………………………………………………………………. 95 ELECTRICAL SCHEMATIC – BRIGGS & STRATTON 37BV-EFI………………………………………………………………………………………………….. 96 ELECTRICAL SCHEMATIC – BRIGGS & STRATTON 40BV-EFI………………………………………………………………………………………………….. 97
LIMITED WARRANTY – COMMERCIAL EQUIPMENT ………………………………………………………. INSIDE BACK COVER
III

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NOTES
IV

Section 1 R

GENERAL INFORMATION

1.1 INTRODUCTION
Your mower was built to the highest standards in the industry. However, the prolonged life and maximum efficiency of your mower depends on you following the operating, maintenance and adjustment instructions in this manual.
If additional information or service is needed, contact your Scag Power Equipment Dealer.
We encourage you to contact your dealer for repairs. All Scag dealers are informed of the latest methods to service this equipment and provide prompt and efficient service in the field or at their service shop. They carry a full line of Scag service parts.

USE ONLY SCAG APPROVED ATTACHMENTS AND ACCESSORIES.
Attachments and accessories manufactured by companies other than Scag Power Equipment are not approved for use on this machine. See Section 8-1.
WARNING
For pictorial clarity, some illustrations and figures in this manual may show shields, guards or plates open or removed. Under no circumstances should your mower be operated without these devices in place.

– IMPORTANT –
The replacement of any part on this product by other than the manufacturer’s authorized replacement part may adversely affect the performance, durability or safety of this product.
Use of other than original Scag replacement parts will void the warranty.
When ordering parts, always give the model and serial number of your mower. The serial number plate is located between the seat and the controls where shown in Figure 1-1.

All information is based upon product information available at the time of approval for printing. Scag Power Equipment reserves the right to make changes at any time without notice and without incurring any obligation.
1.2 DIRECTION REFERENCE
The “Right” and “Left”, “Front” and “Rear” of the machine are referenced from the operator’s right and left when seated in the normal operating position and facing the forward travel direction.
1.3 SERVICING THE ENGINE AND DRIVE TRAIN COMPONENTS

SERIAL NUMBER LOCATION

The detail servicing and repair of the engine, hydraulic pumps and gearboxes are not covered in this manual; only routine maintenance and general service instructions are provided. For service of these components during the limited warranty period, it is important to contact your Scag dealer or find a local authorized servicing agent of the component manufacturer. Any unauthorized work done on these components during the warranty period may void your warranty.

Figure 1-1. Mower Serial Number Plate Location
1

1.4 SYMBOLS

SYMBOL

DESCRIPTION Choke

SYMBOL

DESCRIPTION Transmission

Section 1

Parking Brake On/Start

Spinning Blade
48071S
Spring Tension on Idler

Off/Stop

Oil

Falling Hazard

Thrown Object Hazard

Fast

Slow

Continuously Variable – Linear

Cutting Element – Basic Symbol

Pinch Point
481039S
Hour meter/Elapsed Operating Hours

Cutting Element – Engage Cutting Element – Disengage

Keep Bystanders Away

Read Operator’s Manual

Section 2 R

SAFETY INFORMATION

2.1 INTRODUCTION
Your mower is only as safe as the operator. Carelessness or operator error may result in serious bodily injury or death. Hazard control and accident prevention are dependent upon the awareness, concern, prudence, and proper training of the personnel involved in the operation, transport, maintenance and storage of the equipment. Make sure every operator is properly trained and thoroughly familiar with all of the controls before operating the mower. The owner/user can prevent and is responsible for accidents or injuries occurring to themselves, other people or property.
READ THIS OPERATOR’S MANUAL BEFORE ATTEMPTING TO START YOUR MOWER.

DANGER
The signal word “DANGER” denotes that an extremely hazardous situation exists on or near the machine that could result in high probability of death or irreparable injury if proper precautions are not taken.
WARNING
The signal word “WARNING” denotes that a hazard exists on or near the machine that can result in injury or death if proper precautions are not taken.

A replacement manual is available from your authorized Scag Service Dealer or by contacting Scag Power Equipment, Service Department at P.O. Box 152, Mayville, WI 53050 or contact us via the Internet at www.scag.com. The manual for this machine can be downloaded by using the model and serial number or use the contact form to make your request. Please indicate the complete model and serial number of your Scag product when requesting replacement manuals.
2.2 SIGNAL WORDS

CAUTION
The signal word “CAUTION” is a reminder of safety practices on or near the machine that could result in personal injury if proper precautions are not taken.
Your safety and the safety of others depends significantly upon your knowledge and understanding of all correct operating practices and procedures of this machine.

2.3 BEFORE OPERATION CONSIDERATIONS

This symbol means “Attention! Become Alert! Your Safety is Involved!” The symbol is used with the following signal words to attract your attention to safety messages found on the decals on the machine and throughout this manual. The message that follows the symbol contains important information about safety. To avoid injury and possible death, carefully read the message! Be sure to fully understand the causes of possible injury or death.
SIGNAL WORD:
It is a distinctive word found on the safety decals on the machine and throughout this manual that alerts the viewer to the existence and relative degree of the hazard.

WARNING
Check all hydraulic connections for tightness. Inspect all hydraulic hoses and / or lines to insure they are in good condition before operating.
1. NEVER allow children to operate this riding mower. Do not allow adults to operate this machine without proper instructions.
2. Do not mow when children and/or others are present. Keep children out of the mowing area and in the watchful care of a responsible adult other than the operator. Be alert and turn machine off if a child enters the area.

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3. DO NOT allow children to ride or play on the machine, it is not a toy.
4. Clear the area to be mowed of objects that could be picked up and thrown by the cutter blades.
5. DO NOT carry passengers.
6. DO NOT operate the machine under the influence of alcohol or drugs.
7. If the operator(s) or mechanic(s) cannot read English, it is the owner’s responsibility to explain this material to them.
8. DO NOT wear loose fitting clothing. Loose clothing, jewelry or long hair could get tangled in moving parts. Do not operate the machine wearing shorts; always wear adequate protective clothing including long pants. Wearing safety glasses, safety shoes and a helmet is advisable and is required by some local ordinances and insurance regulations.

– NOTE If the mower is driven on public roads, it must comply with state and local ordinances as well as SAE J137 and/or ANSI / ASAE S279 requirements. Contact your local authorities for regulations and equipment requirements.
15. Do not operate without the side discharge chute installed and in the down position or with an optional grass catcher or mulch plate completely installed.
16. Check the blade mounting bolts at frequent intervals for proper tightness.
17. Make sure all hydraulic fluid connections are tight and all hydraulic hoses and lines are in good condition before starting the machine.
WARNING

WARNING
Always wear hearing protection. Operating this machine over prolonged periods of time can cause loss of hearing.
9. Keep the machine and attachments in good operating condition. Keep all shields and safety devices in place. If a shield, safety device or decal is defective or damaged, repair or replace it before operating the machine.
10. Fuel is flammable; handle it with care. Fill the fuel tank outdoors. Never fill it indoors. Use a funnel or spout to prevent spillage. Clean up any spillage before starting the engine.
11. DO NOT add fuel to a running or hot engine. Allow the engine to cool for several minutes before adding fuel. Never fuel indoors or inside enclosed trailers.
12. Keep flammable objects (cigarettes, matches, etc.), open flames and sparks away from the fuel tank and fuel container. Use only approved containers.
13. See Section 7.5 ENGINE FUEL SYSTEM for fueling procedure.
14. Equipment must comply with the latest requirements per SAE J137 and/or ANSI/ASAE S279 when driven on public roads.

This machine is equipped with an interlock system intended to protect the operator and others from injury. This is accomplished by preventing the engine from starting unless the deck drive is disengaged, the parking brake is on, the steering control levers are in the neutral position and the operator is in the seat. The system shuts off the engine if the operator leaves the seat with the deck drive engaged and/or the steering control levers are not in the neutral position and the parking brake is not engaged. Never operate equipment with the interlock system disconnected or malfunctioning.
18. Be sure the interlock switches are functioning correctly.
2.4 TESTING THE SAFETY INTERLOCK SYSTEM
The safety interlock system should be tested each time before using the machine. If the safety interlock system does not operate as described below, contact your local Authorized Scag Power Equipment Dealer immediately to have the safety interlock system repaired.
1. Sit in the seat in the operating position, engage the parking brake, place the steering control levers in the neutral lock position, and engage the PTO switch to the ON (up) position. Try to start the engine; the engine should not start.

Section 2
2. Sit in the seat in the operating position, engage the parking brake, move either of the steering control handles out of the neutral lock position, move the PTO switch to the OFF (down) position. Try to start the engine; the engine should not start. Repeat for the other steering control lever.
3. Sit in the seat in the operating position, disengage the parking brake, place the steering control levers in the neutral lock position, move the PTO switch to the OFF (down) position. Try to start the engine; the engine should not start.
4. Sit in the seat in the operating position, engage the parking brake, place the steering control levers in the neutral lock position, move the PTO switch to the OFF (down) position, and start the engine. With the engine running, release the parking brake and rise slightly off of the seat. The engine should shut off.
5. Sit in the seat in the operating position, engage the parking brake, place the steering control levers in the neutral lock position, move the PTO switch to the OFF (down) position, and start the engine. With the engine running, engage the PTO switch to the ON (up) position, and rise slightly off of the seat. The engine should shut off.
6. Sit in the seat in the operating position, engage the parking brake, place the steering control levers in the neutral lock position, move the PTO switch to the OFF (down) position, and start the engine. With the engine running, move either steering control lever out of the neutral lock position. The engine should shut off. Repeat for the other steering control lever.
2.5 OPERATION CONSIDERATIONS
1. Know the function of all controls and how to stop quickly.
WARNING
DO NOT operate on steep slopes. To check a slope, attempt to back up it (with the cutter deck down). If the machine can back up the slope without the wheels slipping, reduce speed and use extreme caution. Under no circumstances should the machine be operated on slopes greater than 15 degrees. See Figure 2-4, Page 8 to determine approximate slope of area to be mowed. ALWAYS FOLLOW OSHA APPROVED OPERATION.

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2. Reduce speed and exercise extreme caution on slopes and in sharp turns to prevent tipping or loss of control. Be especially cautious when changing directions on slopes.
3. Stay two cut widths away from slopes, drop offs, ditches, water and retaining walls.
4. To prevent tipping or loss of control, start and stop smoothly, avoid unnecessary turns and travel at reduced speed.
5. Immediately apply the parking brake if you lose steering control while operating. Inspect the machine and correct the problem before continuing to operate.
6. When using any attachment, never direct the discharge of material toward bystanders or allow anyone near the machine while in operation.
7. Before attempting to start the engine, with the operator in the seat, disengage power to the cutter deck, place the steering control levers in the neutral position and engage the parking brake.
8. If the mower discharge ever plugs, shut off the engine, remove the ignition key, and wait for all movement to stop before removing the obstruction.
WARNING
DO NOT use your hand to dislodge the clogged discharge chute. Use a stick or other device to remove clogged material after the engine has stopped running and the blades have stopped turning.
9. Be alert for holes, rocks, roots and other hidden hazards in the terrain. Keep away from any dropoffs. Beware of overhead obstructions (low limbs, etc.), underground obstacles (sprinklers, pipes, tree roots, etc.). Cautiously enter a new area. Be alert for hidden hazards.
10. Disengage power to cutter deck before backing up. Do not mow in reverse unless absolutely necessary and then only after observation of the entire area behind the mower. If you must mow in reverse, maintain a constant lookout to the rear of the machine and mow slowly.
11. DO NOT turn sharply. Use care when backing up.
12. Disengage power to cutter deck before crossing roads, walks or gravel drives.

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13. Mow only in daylight or good artificial light. 14. NEVER raise the deck with the blades engaged. 15. Take all possible precautions when leaving the
machine unattended, such as disengaging the mower, lowering the attachments, setting the parking brake, stopping the engine, and removing the key. 16. Disengage power to the attachments when transporting or when not in use. 17. The machine and attachments should be stopped and inspected for damage after striking a foreign object, and damage should be repaired before restarting and operating the machine.
CAUTION
Do not touch the engine or the muffler while the engine is running or immediately after stopping. These areas may be hot enough to cause a burn.
DANGER
DO NOT run the engine inside a building or a confined area without proper ventilation. Exhaust fumes are hazardous and contain carbon monoxide which can cause brain injury and death.

22. Tie the mower down securely using straps, chains, cable, or ropes. Both front and rear straps must be directed down and outward from machine.
23. Use care when approaching blind corners, shrubs, trees, or other objects that may obscure vision.
24. NEVER leave the machine running unattended.
2.6 ROLL-OVER PROTECTION SYSTEM
WARNING
Keep the roll bar in the raised and locked position and the seat belt securely fastened during operation. Failure to do so could cause serious injury or loss of life.
This mower has been designed for good traction and stability under normal mowing conditions. However, caution must be used when traveling on slopes, especially when the grass is wet. Do not mow on wet grass. Wet grass reduces traction and steering control.
Any or all parts of the Roll-Over Protection System MUST NOT be removed. Failure to adhere to this guideline could result in injury or death.

18. Keep hands and feet away from cutter blades and moving parts. Contact can injure.
19. Transport the mower using a heavy duty trailer or truck. Insure the trailer or truck has all of the necessary lighting and markings as required by laws, codes, and ordinances. Secure a trailer with a safety chain.
20. Be cautious when loading and unloading onto trailers or trucks. Use only a full width ramp. Ramp angle should be no more than 15 degrees. See Figure 2-4, Page 8 to determine approximate slope of the ramp. Back up the ramp and drive down forward.
21. When transporting the mower, make sure the park brake is engaged, the steering control levers are in the neutral position, the engine is off with the key removed, and the wheels have been blocked.
6

Section 2 R

WARNING
There is no roll-over protection when the roll bar is in the down position.
Lower the roll bar only when absolutely necessary.
Raise the roll bar as soon as clearance permits.
DO NOT wear the seat belt when the roll bar is in the down position.
ALWAYS wear seat belt when roll bar is in the up position.
Operate the machine smoothly, no sudden turns, starts or stops.
Check the area carefully before mowing for proper overhead clearance (i.e. branches, doorways, etc.).
DO NOT contact any overhead object with the roll bar.

U PR IG H T A N D LO C K ED PO SITIO N

Figure 2-1. Foldable Roll-Over Protection System

LOCK PIN

HAIR PIN

Lower the roll bar only when absolutely necessary.
1. To lower the roll bar, remove the hairpin cotter pins and remove the two (2) lock pins. See Figure 2-2.
2. Lower the roll bar to the down position.
3. To raise the roll bar, lift the bar to the upright position.
4. Install the two (2) lock pins through the hole, secure with the two (2) hairpin cotter pins. See Figure 2-2.

Figure 2-2. ROPS Hinge
The potential exposure of the seat belt to severe environmental conditions make it crucial to inspect the seat belt system regularly.
It is recommended that the seat belt be inspected on a daily basis for signs of damage. Any seat belt system that shows cuts, fraying, extreme or unusual wear, significant discoloration due to UV exposure, dirt or stiffness, abrasion to the seat belt webbing, or damage to the buckle, latch plate, hardware or any other obvious problem should be replaced immediately.

WARNING
Failure to properly inspect and maintain the seat belt can cause serious injury or loss of life.
1. Check the full length of the seat belt webbing for cuts, wear, fraying, dirt and stiffness. See Figure 2-3.
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2. Check the seat belt webbing in areas exposed to ultra violet rays from the sun or extreme dust or dirt. If the original color of the webbing in these areas is extremely faded and/or is packed with dirt, the physical strength of this webbing may have deteriorated. If this condition exists, replace the seat belt system.
3. Check the buckle and latch for proper operation and determine if the latch plate is excessively worn, deformed, or if the buckle is damaged or cracked. See Figure 2-3.
INSPECT BUCKLE & LATCH
INSPECT WEBBING
Figure 2-3. Seat Belt Inspection
20 o 15o 10 o 5o
Figure 2-4. Slope Angle Graph

Section 2
WARNING
Reduce speed when turning, operating on slopes, slick or wet surfaces. Allow extra distance to stop.
Stay off of slopes too steep for safe operation. To check a slope, attempt to back up it (with the cutter deck down). If the machine can not back up the slope without the wheels slipping, do not operate the machine on this slope. Under no circumstances should the machine be operated on slopes greater than 15 degrees. See Figure 2-4 to determine approximate slope.
DO NOT mow near drop-offs, ditches or embankments. The machine could suddenly roll over if a wheel goes over the edge or if the edge caves in.
Operate the machine smoothly, no sudden turns, starts or stops on a slope.
NEVER tow on slopes. The weight of the towed equipment may cause loss of traction and loss of control.
DO NOT permit untrained personnel to operate the machine.
Be cautious when loading and unloading onto trailers or trucks.
Use only a full width ramp.
Ramp angle should be no more than 15 Degrees. See Figure 2-4 to help determine approximate slope.
Back up the ramp and drive down forward.

Section 2
2.7 MAINTENANCE CONSIDERATIONS & STORAGE
1. Never make adjustments to the machine with the engine running unless specifically instructed to do so. If the engine is running, keep hands, feet, and clothing away from moving parts.
2. Disengage drives, lower implement, set parking brake, stop engine and remove key or disconnect spark plug wire to prevent accidental starting of the engine when servicing or adjusting the machine. Wait for all movement to stop before adjusting, cleaning or repairing.
3. Disconnect battery or remove spark plug wire before making any repairs. Disconnect the negative terminal first and the positive last. Reconnect the positive first and the negative last.
4. Keep all nuts, bolts and screws tight, to insure the machine is in safe working condition. Check blade mounting bolts frequently to be sure they are tight.
5. Do not change the engine governor settings or overspeed the engine. See the engine operator’s manual for information on engine settings.
6. To reduce fire hazard, keep the cutting units, drives, muffler and engine free of grass, leaves, excessive grease, oil and dirt.
7. Park the machine on level ground and engage the parking brake.
8. NEVER allow untrained personnel to service the machine.
9. Use care when checking blades. Use a Blade Buddy, wrap the blade(s) or wear gloves and USE CAUTION when servicing blades. Only replace blades. NEVER straighten or weld blades.
10. Keep all parts in good working condition. Replace all worn or damaged decals.
11. Use jack stands to support components when required.
12. Carefully release pressure from components with stored energy.

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WARNING
Hydraulic fluid is under high pressure and can penetrate skin causing injury. If hydraulic fluid is injected into the skin, it must be surgically removed within a few hours by a doctor or gangrene may result.
Keep body and hands away from pinholes or nozzles that eject hydraulic fluid under high pressure. Use paper or cardboard and not hands to search for leaks.
Safely relieve all pressure from the hydraulic system by placing the control levers in the neutral lock position and shutting off the engine before performing any work on the hydraulic system.
If you need service on your hydraulic system, please see your authorized Scag dealer.
13. Let the engine cool before storing. 14. DO NOT store the machine near an open flame. 15. Shut off fuel while storing or transporting. 16. DO NOT store fuel near flames or drain indoors. 17. Charge batteries in an open, well ventilated area,
away from spark and flames. Unplug charger before connecting or disconnecting from battery. Wear protective clothing and use insulated tools.
2.8 USING A SPARK ARRESTOR
The engine in this machine (excluding the 35BVAC) is not equipped with a spark arrestor muffler. It is in violation of California Public Resource Code Section 4442 to use or operate this engine on or near any forest covered, brush covered or grass covered land unless the exhaust system is equipped with a spark arrestor meeting any applicable local or state laws. Other states or federal areas may have similar laws. Check with your state or local authorities for regulations pertaining to these requirements.
2.9 SPARK IGNITION SYSTEM
This spark ignition system complies with Canadian ICES-002.

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2.10 SAFETY AND INSTRUCTIONAL DECALS
483407
483407
483406

Section 2

W A R N IN G

INSTALL BELT COVER BEFORE

OPERA TING MACHINE

READ OPERA TO R ‘S M A N UA L

483402

R FOR W A R D

REVERSE

481568

483633
WARNNIINNGG
Operation of this equipment may create sparks that can start fires around dry vegetation. A spark arrestor may be required. The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements.
483900
483900 (supplieditwh aCliofrnia
models only)

483300 483425

484281

486584 485664 / 485964 / 485

484320
390S0150J Rev.01
10

Section 3

3.1 ENGINE

SPECIFICATIONS

General Type ………………………………………………………………………………………………… Heavy Duty Industrial/Commercial Gasoline, Diesel or LP Model:
Scag Model STTII-52V-25CH-LP-EFI, STTII-61V-25CH-LP- EFI………………………………………………………………… Kohler Command PCH740 Scag Model STTII-52V-31BV, STTII-61V-31BV ………………………………………………………………………………………… Briggs & Stratton Vanguard Scag Model STTII-61V-31DFI, STTII-72V-31DFI ……………………………………………………………………………………………………….Kawasaki FD851D Scag Model STTII-61V- 40BV-EFI, STTII-72V-40BV-EFI …………………………………………………………………………… Briggs & Stratton Vanguard Scag Model STTII-61V-25KBD, STTII-72V- 25KBD……………………………………………………………………………………………………………. Kubota D902 Displacement: Kohler 25CH-LP (PCH740)………………………………………………………………………………………………………………………………………………………………..747cc Kawasaki 31DFI (FD851D) ……………………………………………………………………………………………………………………………………………………………….824cc Briggs & Stratton 31BV …………………………………………………………………………………………………………………………………………………………………….896cc Briggs & Stratton 40BV-EFI ………………………………………………………………………………………………………………………………………………………………993cc Kubota 25KBD (D902) ………………………………………………………………………………………………………………………………………………………………………898cc Type: Kohler (PCH740)………………………………………………………………………4-Cycle, Air Cooled, Electronic Fuel Injection Liquid Propane, OHV Kawasaki (FD851D) …………………………………………………………………………… 4-Cycle, Liquid-Cooled, Digital Fuel Injection Gasoline, OHV Briggs & Stratton (31BV) …………………………………………………………………………… 4-Cycle, Air-Cooled, Naturally Aspirated Gasoline, OHV Briggs & Stratton (37BV-EFI) ……………………………………………………………..4-Cycle, Air-Cooled, Electronic Fuel Injection Gasoline, OHV Kubota (D902)………………………………………………………………………………………4 Stroke Diesel, 3 Cylinder, Horizontal Shaft, Liquid-Cooled Cylinders…………………………………………………………………………………………………………………………………………………………………………………………………. Varies Governor – Gasoline Engines……………………………………………………………. Mechanical Type with Variable Speed Control Set At 3800 RPM Governor – LP Engine ………………………………………………………………………… Mechanical Type with Variable Speed Control Set At 3800 RPM Governor – Diesel Engine…………………………………………………… Mechanical Type with Variable Speed Control Set At 3670 RPM -Kubota Idle Speed: Kohler ………………………………………………………………………………………………………………………………………………………………………………………… 1400 RPM Kawasaki……………………………………………………………………………………………………………………………………………………………………………………. 1400 RPM Briggs & Stratton………………………………………………………………………………………………………………………………………………………………………. 1750 RPM Kubota……………………………………………………………………………………………………………………………………………………………………………………….. 1200 RPM Carburation: Kohler (PCH740)………………………………………………………………………………………………………………………………………………. Electronic Fuel Injection Kawasaki (FD851D) ………………………………………………………………………………………………………………………………………………..Digital Fuel Injection Briggs & Stratton (31BV) ……………………………………………………………………………………………………………………….Fixed Jet Sidedraft Carburetor Briggs & Stratton (40BV-EFI) ………………………………………………………………………………………………………………………….. Electronic Fuel Injection Fuel Pump: Kohler (LP)……………………………………………………………………………………………………………………………………………………………….. Vaporizer/Regulator Kawasaki ………………………………………………………………………………………………………………………..High Pressure Electric with In- Line Fuel Filter Briggs & Stratton (31BV) ……………………………………………………………………………………………………………….Mechanical with In-Line Fuel Filter Briggs & Stratton (37BV-EFI) ……………………………………………………………………………………………………………….. Electric with In-Line Fuel Filter Kubota …………………………………………………………………………………Injection Pump, Bosch MD Mini Type with In-Line Fuel Filter – Kubota Fuel – Gasoline Engines ………………………………………………………………………….. Non-Leaded Gasoline with a Minimum Octane Rating of 87 Fuel – LP Engine…………………………………………………………………………………………………………………………………………………………… Commercial Propane Fuel – Diesel Engine …………………………………………………………………………………………………….. Diesel Fuel with a minimum Cetane rating of 40 Oil Pump – Gasoline & LP Engines …………………………………………………………………………………………………………….Full Pressure w/Full-Flow Filter Oil Pump – Diesel Engine ……………………………………………………………… Positive Displacement GerotorTM Oil Pump with Oil Filter – Kubota Starter…………………………………………………………………………………………………………………………………………………. Electric Starting with Solenoid Shift Belts…………………………………………………………………………………………………………………………………………. Kevlar cord, Self- adjusting, Self-tightening

Section 3

3.2 ELECTRICAL
Battery …………………………………………………………………………………………………………………………………………………………………………………………………….12 Volt Charging System …………………………………………………………………………………………………………………………………………………………………………….Alternator Charging Output:
Kohler (PCH740)………………………………………………………………………………………………………………………………………………………………12 Volt, 20 Amp Kawasaki (FD851D) …………………………………………………………………………………………………………………………………………………………12 Volt, 30 Amp Briggs & Stratton……………………………………………………………………………………………………………………………………………………………..12 Volt, 20 Amp Kubota………………………………………………………………………………………………………………………………………………………………………………12 Volt, 40 Amp System Polarity……………………………………………………………………………………………………………………………………………………………………Negative Ground Interlock Switches ……………………………………………………………………………. Seat, Neutral Control, Mower Engagement (PTO), Parking Brake Instrument Panel ……………………………………………………………………….. Tiger Eye Advanced Monitoring System, Key Switch, Throttle Lever,
Manual Choke (Gasoline Non-EFI), PTO Switch, Fuses and Check Engine Indicator (31BV, 35BV, 37BV, FD851D) Fuses ………………………………………..One (1) 20 Amp (25LP) or Two (2) 20 Amp (FD851D) or and One (1) 5 Amp or One (1) 20 Amp and
One (1) 50 Amp Resettable (Kubota D902)
3.3 POWER HEAD
Drive System ………………………………Hydraulic Drive with Two Variable Displacement Pumps and Two Cast-Iron High Torque Motors Hydrostatic Pumps…………………………………………………………………………………………….Two Hydro-GearTM 16 cc/rev. Pumps with Dump Valves Drive Wheel Motors:…………………………………………………………………………. Two Parker Model TG 18 cu. Inch Cast-Iron High-Torque Motors Steering/Travel Control ………………………………………………………………………………………………………………….Twin Lever Fingertip Steering Control
with Individual Control to Each Wheel with Gas Spring Dampers Parking Brake …………………………………………………………………………………Foot Pedal Actuated Linkage to Brakes on Both Drive Wheel Axles Wheels:
(2) Front Caster ………………………………………………………………………………………………………………………………………….. 13 X 6.50 Four Ply, Flat Free (2) Drive – (52″ Deck)………………………………………………………………………………….26 X 9.50 X 12 Six-Ply Pneumatic Tubeless, Radius Edge (2) Drive – (61″ & 72″ Deck) ………………………………………………………………………….. 26 x 12 x 12 Six-Ply Pneumatic Tubeless, Radius Edge Tire Pressure: Front Caster …………………………………………………………………………………………………………………………………………………………………………………. Flat Free Drive……………………………………………………………………………………………………………………………………………………………………………………………………..8 PSI Fuel Tank…………………………………………………………12-Gallon Seamless Polyethylene Tank with Large Opening, Fuel Gauge and Fill Cap Fuel Tank (LP) ………………………………………………………………………………………………………………………………………………………….. 33.5# Industrial LP Tank Seat…………………………………………………………………………………………………………………………………………………………………………. Padded Suspension Seat Travel Speed……………………………………………………………………………………………………………………………………………………………………… Varies – See Below Forward……………………………………………………………………………………………………………………..0 up to 12 MPH (Gasoline & LP Powered Machines)
0 up to 10 MPH (Diesel Powered Machines) Reverse……………………………………………………………………………………………………………………….. 0 up to 6 MPH (Gasoline & LP Powered Machines)
0 up to 6 MPH (Diesel Powered Machines) -NOTE- The machine will travel up to maximum rated speed for transport purposes. For best cutting performance the forward travel speed should be adjusted depending upon the cutting conditions.

Section 3

3.4 CUTTER DECK

Type………………………………………… Floating, Adjustable, Anti-Scalping, Hybrid Design Combines Out-Front and Belly-Mount Designs Construction ………………………………………………………………………………………………………………………………………………………Tri-Plate deck construction
Top of deck consists of three steel plates totaling nearly 1/2″ of steel., 7-gauge (3/16″) deck skirt. True Cutting Width:
52V……………………………………………………………………………………………………………………………………………………………………………………….52″ (132.0 cm) 61V……………………………………………………………………………………………………………………………………………………………………………………….61″ (155.0 cm) 72V…………………………………………………………………………………………………………………………………………………………………………………… 71.5″ (181.6 cm) Cutting Height Adjustment ……………………….Foot-Operated Lever Adjustment from Operator’s Seat, 1.0″ to 6.0″ in 1/4″increments Cutter Blades……………………………………………………………………………………………………………………..197 or .250 Thick, Milled Edge, Wear Resistant 52V……………………………………………………………………………………………………………………………………………………………………………..Three (3) 18″ blades 61V……………………………………………………………………………………………………………………………………………………………………………..Three (3) 21″ blades 72V…………………………………………………………………………………………………………………………………………………………………………. Three (3) 24.5″ blades Blade Engagement ……………………………………………………………………………….. Electric Blade Engagement Clutch with Control Panel Switch
Connected to the Cutter Deck Gearbox through a Drive Shaft. Discharge Opening ……………………………………Extra-Wide Discharge Opening with Spring-Loaded Discharge Chute and Turbo Baffle Discharge Chute …………………………………………………………………………………………………………………………….Black, Polypropylene (Plastic), Flexible Spindles ………………………………………………………… Heavy-Duty 1-1/8″ Top Dimension Spindle Shaft, Cast Housing, Taper Roller Bearing,
Low Maintenance with Top Access Grease Fitting and Grease Overfill Relief Poppet Spindle Pulleys ………………………………………………………………………………………………………………………Split Steel with Easily Removed Taper Hubs Cutter Deck Belts ………………………………………………………………………………………. B-Section with Kevlar Cord, Self-Adjusting, Self-Tightening Electric Clutch Type ………………………………………………………………………………………………………………………….Ogura Heavy Duty PTO Clutch Brake Drive Shaft ……………………………………………………………………………………………………………………Clamp Yoke Shaft With Two High-Speed U-Joints

3.5 HYDRAULIC SYSTEM

Hydraulic Oil Filter …………………………………………………………………………………………………………………………………. 10 Micron Spin-on Element Type Hydraulic Reservoir…………………………………………………………………………………………………………………………………………………Nylon; 3 Quart Capacity

3.6 WEIGHTS AND DIMENSIONS

52V

61V

72V

Length ………………………………………………………………………………………………………..80.5″ …………………………………..85.5″ …………………………………….. 89.5″ Tracking Width ………………………………………………………………………………………….. 51″ ………………………………………56″…………………………………………..56″ Overall Width w/chute down………………………………………………………………….64.5″ …………………………………..73.5″ …………………………………………83″ Overall Width w/chute up …………………………………………………………………….. 53.75″ …………………………………62.75″…………………………………..73.75″ Overall Height w/ROPS up ………………………………………………………………………. 68″ ………………………………………68″…………………………………………..68″ Overall Height w/ROPS down…………………………………………………………………46.5″ …………………………………..46.5″ …………………………………….. 46.5″ Operating Weight (approx.)……………………………………………………………………1418# …………………………..1496#-1538# ……………………………. 1556# Operating Weight – LP-EFI Engine …………………………………………………………1486# …………………………………1606# ……………………………………….. NA Operating Weight – 35BV or 37BV-EFI Engine ………………………………………..NA ……………………………………1519# ………………………………….. 1556# Operating Weight – Kubota Diesel Engine ……………………………………………..NA ……………………………………1709# ………………………………….. 1739#

3.7 PRODUCTIVITY

52V

61V

72V

Cutting Width ……………………………………………………………………………………………. 52″ ………………………………………61″…………………………………………..72″ Acres Per Day ……………………………………………………………………………………………. 20.2 …………………………………….23.7………………………………………….. 28 The preceding chart will aid you in determining how many acres your Scag mower will cut per day. The chart is an estimate based on 8 hours per day cutting time at 6 MPH with a 20% allowance for overlap and turns.

Section 4

OPERATING INSTRUCTIONS

CAUTION
Do not attempt to operate this mower unless you have read this manual. Learn the location and purpose of all controls and instruments before you operate this mower.
Before operating the mower, familiarize yourself with all mower and engine controls. Knowing the location, function and operation of these controls is important for safe and efficient operation of the mower.
This machine is equipped with the Tiger Eye Advanced Monitoring System. With the key in the on position, before starting the engine, the lights for the Seat Indicator, PTO Indicator, Neutral Indicator and Park Brake Indicator should be illuminated. This indicates there is an operator in the seat, the PTO is off, steering levers are in neutral, and the parking brake is applied. When all the lights are illuminated, the key can be turned to the start position and the mower can be started. See Section 4.3 Safety Interlock System. If any of these indicator lights are not illuminated, the engine will be prevented from starting. If additional information or service is needed, contact your Scag Power Equipment Dealer.
4.1 TIGER EYE INSTRUMENT IDENTIFICATION
1. Service Air Filter Indicator (Figure 4-1). Optional Accessory. Indicates the condition of the engine air filter. Icon will display when it is time to change the air filter.
2. Glow Plug Indicator (Figure 4-1). Used on Diesel Powered Units Only. Indicator turns on when the key switch is turned to the ON position. Glow plug timer will cycle on for approximately 5 seconds as glow plugs preheat. At the end of the cycle, the indicator will turn off. Glow plugs must be preheated before starting the engine.
3. Oil Pressure Indicator (Figure 4-1). Used on Diesel Powered Units Only. Indicates engine oil pressure. Reference the engine operator’s manual for further information.

4. Service Engine Indicator (Figure 4-1). Indicates the maintenance reminder for the engine oil change. Has preset maintenance reminder and will start flashing scheduled maintenance 2 hours before preset time and continue flashing until 2 hours after. Automatically resets.
5. Voltmeter Indicator (Figure 4-1). Indicates the condition of the charging system. When the engine is running, in normal operating conditions, the bar graph should be in the 12 to 14 volt range.
6. Seat Indicator (Figure 4-1). Light will illuminate when the operator is in the seat engaging the seat switch.
7. PTO Indicator (Figure 4-1). Light will illuminate when the PTO (mower deck) switch is in the OFF position.
8. Hourmeter Indicator (Figure 4-1). Indicates the number of hours the engine has been operated. It only operates when the engine is running. Will start flashing with the Service Engine Indicator at scheduled maintenance 2 hours before preset time and continue flashing until 2 hours after. Automatically resets.
9. Neutral Indicator (Figure 4-1). Light will illuminate when the steering control levers are in the neutral lock position.
10. Park Brake Indicator (Figure 4-1). Light will illuminate when the park brake is in the engaged (ON) position.
11. Water Temperature Indicator (Figure 4-1). Used on Liquid Cooled Models Only. Indicates the operating temperature of the engine. If the engine temperature exceeds the maximum preset value, the indicator will flash and the Park Brake, PTO, Seat and Neutral indicator lights will flash in an alternating pattern.
12. Fuse Holders (Figure 4-2). Two 20-amp fuses and one 5-amp fuse protect the mower’s electrical system. To replace fuses, pull fuse out of the socket and install a new fuse.

Section 4

SERVICE AIR FILTER INDICATOR
WATER TEMPERATURE INDICATOR
PARKING BRAKE INDICATOR

GLOW PLUG INDICATOR

OIL PRESSURE INDICATOR
SERVICE ENGINE INDICATOR
VOLTMETER INDICATOR
SEAT INDICATOR

NEUTRAL INDICATOR

HOUR METER INDICATOR

Figure 4-1. Tiger Eye Advanced Monitoring System

BRAKE PEDAL

SUSPENSION SEAT CONTROL KNOB
DECK LIFT

CUTTING HEIGHT ADJUSTMENT

PTO INDICATOR
DFI / EFI ONLY CHECK ENGINE LIGHT

LEFT STEERING CONTROL
PARKING BRAKE LOCK LATCH
SEAT HOLD DOWN RELEASE LATCH
FUEL GAUGE
SEAT BELT
FUEL SHUTOFF VALVE DUMP VALVE CONTROL

CUTTER DECK RELEASE LEVER
RIGHT STEERING CONTROL
MOWER DECK SWITCH
ENGINE THROTTLE CONTROL TIGER EYE IGNITION SWITCH ENGINE CHOKE CONTROL 12 VOLT POWER SUPPLY
FUSE HOLDERS
DUMP VALVE CONTROL

Figure 4-2. Controls and Instruments
15

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4.2 CONTROLS IDENTIFICATION
1. Ignition Switch (Figure 4-2). The ignition switch is used to start the engine and has three positions; OFF, ON, and START.
2. Mower Deck Switch (Figure 4-2). Used to engage and disengage the mower drive system. Pulling up on the switch will engage the deck drive. Pushing down on the switch will disengage the deck drive.
3. Engine Choke Control, Carburated Engine Only (Figure 4-2). Used to start a cold engine.
4. Engine Throttle Control (Figure 4-2). Used to control the engine speed. Pushing the lever forward increases engine speed. Pulling the lever back decreases engine speed. Full back position is the IDLE position. Full forward is the cutting position.
5. Left Steering Control (Figure 4-2). Used to control the mower’s left wheel when traveling forward or reverse.
6. Right Steering Control (Figure 4-2). Used to control the mower’s right wheel when traveling forward or reverse.
7. Brake Pedal (Figure 4-2). Depressing the brake pedal applies the brake.
8. Parking Brake Lock Latch (Figure 4-2). Used to lock the parking brake in the engaged position. Fully depress the brake pedal and pull the parking brake lock latch back to lock the parking brake in the engaged position. See Figure 4-3. Fully depress the brake pedal forward to disengage the parking brake lock latch, then release the brake pedal to disengage the brake. See Figure 4-4.

Section 4
PUSH BRAKE PEDAL FORWARD THEN RELEASE PEDAL TO DISENGAGE
Figure 4-4. Releasing the Parking Brake 9. Fuel Tank Gauge, Gasoline & Diesel Models Only
(Figure 4-2). Indicates the amount of fuel in the fuel tank. 10. Dump Valve Control Levers (Figure 4-2). Located on the left and right side of the machine, used to “free-wheel” the mower. Move the levers forward until they stop allows the unit to move under hydraulic power. Move the levers back and towards the engine allows the mower to be moved by hand (freewheeling). See Figure 4-5.

PULL BACK ON

PARKING BRAKE

LATCH

PUSH BRAKE

PEDAL FORWARD

Figure 4-3. Engaging Parking Brake

DUMP VALVE CONTROL
Figure 4-5. Dump Valve Control 11. Deck Lift Foot Lever (Figure 4-2). Used to raise
and lower the cutter deck. Push full forward to lock in the transport position. 12. Cutting Height Adjustment (Figure 4-2). Used to set the cutter deck at the desired cutting height.
16

Section 4

13. Deck Release Lever (Figure 4-2). Used to lock the cutter deck in the transport position. Push the foot pedal forward and pull back on the release lever to release the cutter deck for normal mowing.
14. Seat Suspension Control Knob (Figure 4-2). Used to select the optimum suspension rate based on the operator.
15. Seat Belt (Figure 4-2). Used to secure the operator. Seat belt must be worn at all times when the ROPS is in the upright and locked position.
16. Seat Hold Down Release Latch (Figure 4-2). Located behind the seat. Used to secure the seat in the operator’s position. Release the latch to gain access under the seat.
17. Fuel Shutoff Valve Gasoline & Diesel Models (Figure 4-2). Located under the seat on top of the fuel tank. Used to shut off fuel supply to the engine. Rotate the valve counter clockwise to supply fuel from the tank to the engine. Rotate the valve clockwise to shut off the fuel supply to the engine. LP Models, Valve is located on the LP tank.
18. 12 Volt Power Supply (Figure 4-2). Located on the side of the control panel. Fused 12 volt DC power supply used to power accessories rated at 5 amps or less.
4.3 SAFETY INTERLOCK SYSTEM
The mower is equipped with a safety interlock system that prevents the engine from starting unless the deck drive is disengaged, the parking brake is engaged, the steering control levers are in the neutral position and the operator is in the seat. The interlock system shuts off the engine if the operator leaves the seat with the steering control levers not in the neutral position and/or the cutter blades engaged and the parking brake not engaged.
WARNING
Never operate the mower with the interlock system disconnected or malfunctioning. Do not disengage or bypass any switch; injury to yourself and others or property damage could result.

4.4 TESTING THE SAFETY INTERLOCK SYSTEM
The safety interlock system should be tested each time before using the machine. If the safety interlock system does not operate as described below, contact your local Authorized Scag Power Equipment Dealer immediately to have the safety interlock system repaired.
1. Sit in the seat in the operating position, engage the parking brake, place the steering control levers in the neutral lock position, and engage the PTO switch to the ON (up) position. Try to start the engine; the engine should not start.
2. Sit in the seat in the operating position, engage the parking brake, move either of the steering control handles out of the neutral lock position, move the PTO switch to the OFF (down) position. Try to start the engine; the engine should not start. Repeat for the other steering control lever.
3. Sit in the seat in the operating position, disengage the parking brake, place the steering control levers in the neutral lock position, move the PTO switch to the OFF (down) position. Try to start the engine; the engine should not start.
4. Sit in the seat in the operating position, engage the parking brake, place the steering control levers in the neutral lock position, move the PTO switch to the OFF (down) position, and start the engine. With the engine running, release the parking brake and rise slightly off of the seat. The engine should shut off.
5. Sit in the seat in the operating position, engage the parking brake, place the steering control levers in the neutral lock position, move the PTO switch to the OFF (down) position, and start the engine. With the engine running, engage the PTO switch to the ON (up) position, and rise slightly off of the seat. The engine should shut off.
6. Sit in the seat in the operating position, engage the parking brake, place the steering control levers in the neutral lock position, move the PTO switch to the OFF (down) position, and start the engine. With the engine running, move either steering control lever out of the neutral lock position. The engine should shut off. Repeat for the other steering control lever.

Section 4

4.5 INITIAL RUN-IN PROCEDURES
FIRST DAY OF USE OR APPROXIMATELY 20 HOURS
1. Check all belts for proper alignment and wear at 2, 4 and 8 hours.
2. Change the engine oil and oil filter after the first 20 hours of operation. (See Section 7.4.)
3. Check hydraulic oil level in reservoir. (See Section 7.3.)
4. Check for loose hardware. Tighten as needed. 5. Check interlock system for proper operation. (See
Section 4.3.) 6. Check tire pressure. Adjust pressure if necessary.
(See Section 7.11.)
4.6 STARTING THE ENGINE
CAUTION
DO NOT USE STARTING FLUIDS. Use of starting fluids in the air intake system may be potentially explosive or cause a “runaway” engine condition that could result in engine damage and/or personal injury.

9. Turn the ignition key to the START position and release the key as soon as the engine starts. Do not hold the key in the START position for more than 15 seconds at a time. Allow at least 60 seconds between each cranking attempt to prevent overheating of the starter motor. Prolonged cranking can damage the starter motor and shorten battery life.
10. Allow engine to warm before operating the mower.
4.7 GROUND TRAVEL AND STEERING
– IMPORTANT –
If you are not familiar with the operation of a machine with lever steering and/or hydrostatic transmissions, the steering and ground speed operations should be learned and practiced in an open area, away from buildings, fences, or obstructions.
Learn the operation on flat ground before operating on slopes.
Start practicing with a slow engine speed and slow forward travel.
Learn to feather the steering controls to obtain a smooth operating action.
Practice operating the mower until you are comfortable with the controls before proceeding to mow.

1. Be sure the fuel shutoff valve, located behind the operator’s seat, (Gasoline & Diesel Models) is fully open. (See Section 7.5.). LP Powered Machines Make sure the fuel valve is completely open on the LP tank.
2. Secure the ROPS in the upright and locked position.
3. Sit in the operator’s seat, fasten seat belt and place the steering control levers in the neutral position.
4. Engage the parking brake.
5. Place the PTO switch in the disengaged position.
6. Move the engine throttle control to about half engine speed.
7. Gasoline Carburated Units Only – If the engine is cold, choke the engine as needed if equipped.
8. Diesel Powered Units Only – Turn the ignition key to the on position until the glow plug indicator located in the Tiger Eye display goes out.

FORWARD TRAVEL
To travel forward with the mower, disengage the parking brake, pull levers inward out of the neutral lock position and slowly push the steering control levers forward an equal distance. The further the steering control levers are pushed forward the greater the forward speed will be. To increase the speed, push the steering control levers further forward and to decrease the speed, pull the steering control levers back.
To stop the forward travel, pull the steering control levers back to the neutral position.
To steer the mower left while traveling forward, pull the left steering lever back. The further the lever is pulled back, the quicker the mower will turn left.
To steer the mower right while traveling forward, pull the right steering control lever back. The further the lever is pulled back, the quicker the mower will turn right.

Section 4
– NOTE Smooth operation of the steering levers will produce smooth mower operation. While learning the operation of the steering controls, keep the travel speed low.
– IMPORTANT Do not travel forward over a curb. The mower will hang up on the curb. Raise the deck and travel backwards over the curb at a 45 degree angle. (See Section 4.2, items 11 – 13, on page 16 & 17 for cutter deck raising descriptions.)
REVERSE TRAVEL
CAUTION
Disengage power to the mower before backing up. Do not mow in reverse unless absolutely necessary and then only after observation of the entire area behind the mower.

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To steer right while traveling in reverse, allow the right steering control lever to move forward. The further the control is allowed to move forward, the quicker the mower will turn right.
To stop the reverse travel, allow the steering control levers to return to the neutral position. If the mower is to be parked, place the handles in the neutral lock position and engage the parking brake.
4.8 ENGAGING THE DECK DRIVE (CUTTER BLADES)
1. Set the throttle at about 3/4 speed. Do not attempt to engage the deck drive at high speed as this shortens the electric clutch life — use only moderate engine speed when engaging the deck drive.
2. Engage the deck drive by pulling out on the yellow switch, located on the instrument panel, to the engage position. See Figure 4-6.

CAUTION

PULL UP TO ENGAGE

Before backing up, observe the rear for persons and obstructions. Clear the area before backing up. Possible injury or property damage could occur.

PUSH DOWN TO DISENGAGE 390S0138
Figure 4-6. Cutter Engage Switch

To travel in reverse, pull levers inward out of the neutral lock position and pull both handles back. Keep the travel speed low while traveling in reverse.
– NOTE –
The mower may not travel straight in reverse. Slight adjustments may need to be made using the steering controls.
To steer left while traveling in reverse, allow the left steering control lever to move forward. The further the control is allowed to move forward, the quicker the mower will turn left.

– NOTE –
A squealing noise may be heard when engaging or disengaging the deck drive. It is caused by the electric clutch plates meshing as the mower comes up to speed. This is normal.
3. To disengage the deck drive, push the switch in to the disengage position.
4. Always operate the engine at full throttle to properly maintain cutting speed. If the engine starts to lug down, reduce the forward speed and allow the engine to operate at maximum RPM.

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4.9 HILLSIDE OPERATION
WARNING
DO NOT operate on steep slopes. To check a slope, attempt to back up it (with the cutter deck down). If the machine can back up the slope without the wheels slipping, reduce speed and use extreme caution. Under no circumstances should the machine be operated on slopes greater than 15 degrees. See Figure 2-4, Page 8 to help determine approximate slope of area to be mowed. ALWAYS FOLLOW OSHA APPROVED OPERATION.

Section 4
4.11 AFTER OPERATION
1. Wash the entire mower after each use. Do not use high pressure spray or direct the spray onto electrical components.
– IMPORTANT Do not wash a hot or running engine. Cold water will damage the engine. Use compressed air to clean the engine if it is hot.
2. Keep the entire mower clean to inhibit serious heat damage to the engine or hydraulic oil circuit.
3. Check the drive belts for proper alignment and any signs of wear. Correct and adjust if necessary.

1. This mower has been designed for good traction and stability under normal mowing conditions. However, caution must be used when traveling on slopes, especially when the grass is wet. Wet grass reduces traction and steering control. The Roll-Over Protection System is standard equipment for this machine. See Section 2.6, page 6 of this manual for further details.
2. Stay two cut widths away from slopes, drop offs, ditches, water and retaining walls.
3. To prevent tipping or loss of control, do not start or stop suddenly, avoid unnecessary turns and travel at reduced speed. If tires lose traction, disengage blades and proceed slowly off the slope.
4. Avoid sudden starts when mowing uphill. Sudden starts may cause the machine to tip backwards.
5. Loss of traction may occur when traveling down hill. Weight transfers to the front of the machine and may cause the drive wheels to slip causing loss of braking or steering.
6. Keep tires properly inflated.

DANGER
To avoid injury from burns, allow the mower to cool before removing the fuel tank cap and refueling.
4. After the mower has cooled down, fill the fuel tank with fresh, clean fuel at the end of every day of operation. See Engine Owner’s Manual for proper octane requirements.
5. Check the tire pressure. Adjust pressure if necessary.
4.12 REMOVING CLOGGED MATERIAL
DANGER
ROTATING BLADES

4.10 PARKING THE MOWER
1. Park the machine on a flat, level surface only. Do not park the machine on an incline.
2. Place the steering control levers in the neutral position.
3. Disengage the cutter blades. 4. Slow the engine to idle speed. 5. Engage the parking brake. 6. Turn the ignition key to the OFF position and remove
the key.

NEVER PUT YOUR HANDS INTO THE DISCHARGE CHUTE FOR ANY REASON!
Shut off the engine and remove the key and only then use a stick or similar object to remove material if clogging has occurred.
1. If the discharge chute becomes clogged, shut off the engine and remove the ignition key. Using a stick or similar item, dislodge the clogged material. Then resume normal mowing.
20

Section 4

4.13 MOVING MOWER WITH ENGINE STOPPED
To “free-wheel” or move the mower around without the engine running, rotate the dump valve levers counterclockwise. See Figure 4-7. Disengage the parking brake and move the mower by hand. When the machine is in the desired position, engage the parking brake and rotate the levers clockwise until they stop. The dump valve levers must be returned to the DRIVE position and torqued to 10 lb- ft to drive the mower.
DUMP VALVE CONTROL

2. The discharge chute must not be removed and must be kept in the lowest position to deflect grass clippings and thrown objects downward. Direct the side discharge away from sidewalks or streets to minimize cleanup of clippings. When mowing close to obstacles, direct the discharge away from the obstacles to reduce the chance of property damage by thrown objects.
3. Cut grass when it is dry and not too tall. Do not cut grass too short (cut off 1/3 or less of existing grass for best appearance). Mow frequently.
4. Keep mower and discharge chute clean.
5. When mowing wet or tall grass, mow the grass twice. Raise the mower to the highest setting for the first pass and then make a second pass to the desired height.
6. Use a slow travel speed for trimming purposes.
7. Operate the engine at full throttle for best cutting. Mowing with a lower RPM causes the mower to tear the grass. The engine is designed to be operated at full speed.
8. Use the alternate stripe pattern for best lawn appearance. Vary the direction of the stripe each time the grass is mowed to avoid wear patterns in the grass.
4.15 ADJUSTING CUTTING HEIGHT

Figure 4-7. Dump Valve Control
4.14 RECOMMENDATIONS FOR MOWING
1. Do not mow with dull blades. A dull blade will tear grass, resulting in poor lawn appearance and reduced mowing power.
WARNING

The mower deck can be adjusted from a height of 1.0 inch to 6.0 inches at 1/4-inch intervals. To adjust the cutting height:
WARNING
DO NOT adjust the cutting height with the mower blades rotating. Disengage the power to the cutter blades and then adjust cutting height.

DO NOT operate without Discharge Chute, Mulching Kit, or entire Grass Catcher properly installed.

1. Disengage the power to the cutter blades.
2. Push the cutting height adjustment foot pedal all the way forward using your right foot until it locks in place. See Figure 4-8.

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LANYARD PIN
HEIGHT ADJUSTMENT PEDAL
Figure 4-8. Adjusting Cutting Height 3. Insert the lanyard pin into the cutting height index at
the desired cutting height. Push forward on the deck lift foot lever, hold in place and pull back on the deck release lever. See Figure 4-9. Slowly release the foot pedal. A deck height decal is located on the cutting height index as an aid in adjusting the deck to the desired height. See Figure 4-8.

Section 4
4.16 ADJUSTING THE STEERING LEVERS
1. Position the seat to the desired location. 2. While in the operator’s position without the engine
running, move both steering levers forward and reverse to check for full function control and comfort. 3. If adjustment of the steering levers is needed, use the following instructions to adjust.
A. Loosen the tension knob on the lever assembly.
B. Rotate the steering lever forward or backward to achieve the optimum operating position.
C. Tighten the tension knob and repeat on the opposite side.
D. While in the operator’s position, bring the steering levers out of the neutral lock position and check to make sure both levers are even before operating.

TENSION KNOB

ROT ATE LEVER

TENSION KNOB

DECK RELEASE LEVER
Figure 4-9. Deck Release Lever

Figure 4-10. Adjusting Steering Levers 4. The control handle can also be adjusted in two
different positions. If necessary, remove the two bolts securing the control handle to the control lever. Install the handle in the desired position.
4.17 ADJUSTING THE HEIGHT ADJUST PEDAL
1. Position the seat to the desired location. 2. While in the operator’s position without the engine
running, push down on the height adjust pedal to check for full function control.
22

Section 4

3. The height adjust pedal can be located in three (3) different positions for operator comfort and control. See Figure 4-11.

HEIGHT ADJUSTMENT PEDAL LOCATIONS
Figure 4-11. Height Adjust Pedal Locations
4.18 TOWING (OPTIONAL HITCH ACCESSORY)
1. NEVER allow children or others in or on towed equipment.
2. Tow only with a machine that has a hitch designed for towing. Do not attach towed equipment except at the hitch point.
3. Follow manufacturer’s recommendations for weight limit for towed equipment. 250 lbs. maximum towing weight.
4. NEVER tow on slopes. The weight of the towed equipment may cause loss of traction and loss of control.
5. Travel slowly and allow extra distance to stop. 6. Zero-turning with a trailer attached could cause
damage to the trailer or mower.
23

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TROUBLESHOOTING CUTTING CONDITIONS

Section 5

CONDITION

CAUSE

STRINGERS – OCCASIONAL BLADES OF UNCUT GRASS

Low engine RPM

Ground speed too fast

Wet grass

Dull blades, incorrect sharpening

Deck plugged, grass accumulation

Belts slipping

STREAKING – STRIPS OF UNCUT GRASS IN CUTTING

Dull, worn blades

PATH

Incorrect blade sharpening

Low engine RPM

Belt slipping

Deck plugged, grass accumulation

Ground speed too fast

Wet grass

Bent blades
STREAKING – STRIPS OF UNCUT GRASS BETWEEN CUTTING PATHS

CURE
Run engine at full RPM Slow speed to adjust for conditions Cut grass after it has dried out Sharpen blades Clean underside of deck
Adjust belt tension
Sharpen blades Sharpen blades Run engine at full RPM Adjust belt tension Clean underside of deck Slow speed to adjust for conditions Cut grass after it has dried out Replace blades

Not enough overlapping between rows Increase the overlap of each pass

Section 5

TROUBLESHOOTING CUTTING CONDITIONS (CONT’D)

CONDITION

CAUSE

UNEVEN CUT ON FLAT GROUND – WAVY HIGH-LOW APPEARANCE, SCALLOPED CUT, OR ROUGH CONTOUR

Lift worn from blade Blade upside down

Deck plugged, grass accumulation

Too much blade angle (deck pitch)

Deck mounted improperly

Bent spindle area

Dull blade
UNEVEN CUT ON UNEVEN GROUND – WAVY APPEARANCE, HIGH-LOW SCALLOPED CUT, OR ROUGH CONTOUR

Uneven ground

CURE
Replace blade Mount with cutting edge toward ground Clean underside of deck Adjust pitch and level See your authorized SCAG dealer See your authorized SCAG dealer Sharpen blade
May need to reduce ground speed, raise cutting height, and/or change direction of cut

SLOPING RIDGE ACROSS WIDTH OF CUTTING PATH

Tire pressures not equal

Wheels uneven

Deck mounted incorrectly

Deck not level side-to side

Check and adjust tire pressure Check and adjust tire pressure See your authorized SCAG dealer
Check for level and correct

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TROUBLESHOOTING CUTTING CONDITIONS (CONT’D)

Section 5

CONDITION

CAUSE

SCALPING – BLADES HITTING DIRT OR CUTTING VERY CLOSE

Low tire pressures

TO THE GROUND

Ground speed too fast

Cutting too low

Rough terrain

Wet grass

STEP CUT – RIDGE IN CENTER OF CUTTING PATH

Blades not mounted evenly

Bent blade

Internal spindle failure

CURE
Check and adjust pressures
Slow speed to adjust for conditions May need to reduce ground speed, raise cutting height, change direction of cut, and/or change pitch and level May need to reduce ground speed, raise cutting height, and/or change direction of cut
Cut grass after it has dried out
Adjust pitch and level
Replace blade
See your authorized SCAG dealer

Mounting of spindle incorrect

SLOPE CUT – SLOPING RIDGES ACROSS WIDTH OF CUTTING

Bent spindle mounting area

PATH

Internal spindle failure

See your authorized SCAG dealer
See your authorized SCAG dealer See your authorized SCAG dealer

Bent deck housing

See your authorized SCAG dealer

Section 6

ADJUSTMENTS

WARNING

Do not operate the mower if the parking brake is not operable. Possible severe injury could result.
The parking brake linkage should be adjusted whenever the parking brake lock latch is placed in the “ENGAGE” position and the parking brake will not prevent the mower from moving. If the following procedures do not allow you to engage the parking brake properly, contact your Scag dealer for further brake adjustments.
1. Park the machine on a flat surface and block the caster wheels to prevent the machine from moving. Remove the ignition key.
2. Engage the parking brake. Fully depress the brake pedal and pull the parking brake lock latch back to lock the parking brake. See Figure 6-1.
3. Loosen the jam nut at the front of the brake linkage. See Figure 6-2.
4. With the parking brake in the locked position, turn the adjustment nut until the brake spring has an overall length of 2″. See Figure 6-2.
5. Repeat steps 3 and 4 on the other side of the machine.
6. Test the parking brake.
– NOTE –
If this procedure does not achieve proper brake adjustment, please contact your authorized Scag dealer.

PULL BACK ON

PARKING BRAKE

LATCH

PUSH BRAKE

PEDAL FORWARD

Figure 6-1. Brake Adjustment
LOOSEN JAM NUT
2″ WITH PARKING BRAKE ENGAGED

ADJUST HERE

Figure 6-2. Brake Rod Adjustment

Section 6

6.1 TRAVEL ADJUSTMENTS
Neutral or tracking adjustments will need to be made if:

LOOSEN HERE

A. The steering control levers are in the neutral position and the machine creeps forward or backward. See Neutral Adjustment (next procedure).

B. The steering control levers are in the full forward position and the mower pulls to one side or the other when traveling in a forward direction. See Tracking Adjustment on page 29.
NEUTRAL ADJUSTMENT
1. Be sure the dump valve levers are in the run position and the steering control levers are in the neutral lock position.
2. With an operator in the seat, start the engine and disengage the parking brake.
3. Run the engine at full operating speed and check if the machine creeps forward or backwards.
4. Adjust the RH wheel by loosening the jam nuts on the steering control rod and turning the rod until the drive wheel turns in the forward direction. Turn the rod back until the drive wheel stops moving. Turn the rod an additional 1/2 turn. See Figure 6-3.

ADJUST HERE

STT99RHCRA

Figure 6-3. RH Steering Control Rod Adjustment
5. Tighten the jam nuts and repeat for the LH wheel. See Figure 6-4.

LOOSEN HERE

CONTROL ROD

LOOSEN HERE

390S0149-1

ADJUST HERE

390S0146

Figure 6-4. LH Steering Control Rod Adjustment

Section 6

6. Actuate the steering control levers forward and reverse several times and return them to the neutral position.
7. Check that the drive wheels remained in neutral and re-adjust if necessary.
8. Check that the steering control levers hit the stop before the pumps reach full stroke. Adjust as needed.
TRACKING ADJUSTMENT
CAUTION
Stop the engine and remove the key from the ignition before making any adjustments. Wait for all moving parts to come to a complete stop before beginning work.
CAUTION
The engine and drive unit can get hot during operation causing burn injuries. Allow engine and drive components to cool before making any adjustments.
– NOTE Before proceeding with this adjustment, be sure that the caster wheels turn plus pivot freely and that the tire pressure in the drive wheels is correct. If the tire pressure is not correct, the machine will pull to the side with the lower pressure.
1. If at full speed the mower pulls right, it is an indication that the left wheel is turning faster than the right wheel. To adjust this condition, proceed as follows:
A. Stop the machine and place the steering control levers in the neutral position. Loosen the lock nuts securing the ball joints at each end of the LH steering control rod. Rotate the control rod to lengthen the rod and tighten the lock nuts. This will cause the control rod to stroke the LH pump less, slowing down the LH wheel. See Figure 6-4.

– NOTE If after making the adjustment as outlined in step 1A, the machine creeps forward or backward, perform the neutral adjustment. See Neutral Adjustment on page 28.
2. If at full speed the mower pulls left, it is an indication that the right wheel is turning faster than the left wheel. To adjust this condition, proceed as follows:
A. Stop the machine and place the steering control levers in the neutral position. Loosen the lock nuts securing the ball joints at each end of the RH steering control rod. Rotate the control rod to lengthen the rod and tighten the lock nuts. This will cause the control rod to stroke the RH pump less, slowing down the RH wheel. See Figure 6-3.
– NOTE If after making the adjustment as outlined in step 2A, the machine creeps forward or backward, perform the neutral adjustment. See Neutral Adjustment on page 28.
6.2 THROTTLE CONTROL AND CHOKE ADJUSTMENTS
These adjustments must be performed by your Scag dealer to insure proper and efficient running of the engine. Should either need adjustment, contact your authorized Scag service center.
6.3 BELT ADJUSTMENT
WARNING
Before removing any guards, shut the engine off and remove the ignition key.
All drive belts are spring loaded and self-tensioning, however after the first 2, 4, 8 and 10 hours of operation, the belts should be checked for proper alignment and wear. Thereafter, check the belts after every 40 hours of operation or weekly, whichever occurs first.

Section 6

WARNING
If the pump drive belt fails, steering control will be lost which could result in serious injury or death. Replace the pump drive belt as needed or every 400 hours / 2 years, whichever occurs first.

LOOSEN HERE

6.4 BELT ALIGNMENT

ADJUST HERE

Belt alignment is important for proper performance of your Scag mower. If you experience frequent belt wear or breakage, see your authorized Scag service center for belt adjustment.
6.5 CUTTER DECK ADJUSTMENTS

ADJUST HERE

Cutter deck level, pitch and height are set at the factory. However, if these adjustments should ever need to be made, the following procedures will aid in obtaining the proper cutter deck adjustment.
– NOTE –
Before proceeding with the cutter deck adjustments, be sure that all tires are properly inflated.

Figure 6-5. Cutter Deck Level Adjustment
2. Turn the adjustment bolts on the front and rear deck level links clockwise until the cutter deck is level between both sides. See Figure 6-5
3. Tighten the two (2) elastic stop nuts to secure the cutter deck in the proper position.

CUTTER DECK LEVEL

CUTTER DECK PITCH

The cutter deck should be level from side-to-side for proper cutting performance. To check for level, be sure that the mower is on a flat, level surface, the tires are properly inflated and the cutter deck is set at the most common cutting height that you will use. On the RH side of the machine, check the distance from the top of the cutter deck to the floor. Next check the distance from the top of the cutter deck to the floor on the LH side of the machine. Both measurements should be the same. If the two measurements are different, the cutter deck level must be adjusted as follows:
1. If the cutter deck is lower on one side, loosen the elastic stop nuts securing the deck level links on the front and rear of the lower side. See Figure 6-5.

The pitch of the cutter deck should be equal between the front and rear of the cutter deck for proper cutting performance. To check for proper deck pitch, be sure that the mower is on a flat, level surface and the tires are properly inflated.
Check the distance from the top of the cutter deck to the floor at the rear RH side of the cutter deck directly behind the cutter deck hanging chains. Next check the distance from the top of the cutter deck to the floor at the front RH side of the cutter deck directly in front of the cutter deck hanging chains. The measurement at the front of the cutter deck should be the same as the rear of the deck. Make these measurements at the LH side of the cutter deck also. If the measurement at the front of the deck is not the same, the cutter deck pitch must be adjusted as follows:
1. Loosen the elastic stop nuts securing the deck level links on the front of the cutter deck on both sides. See Figure 6-6 and 6-7.

Section 6
LOOSEN HERE
ADJUST HERE
Figure 6-6. Cutter Deck Pitch Adjustment 2. Turn the adjustment bolts on both sides either
clockwise to raise or counter-clockwise to lower the front of the cutter deck until the measurements are equal. Tighten the elastic stop nuts.

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– NOTE –
To prevent the cutter deck from teetering, all four (4) cutter deck hanging chains must have tension on them. If all four chains do not have tension on them and the deck teeters, you must re-adjust the cutter deck as outlined in the procedures above. All measurements should be taken from the top edge of the deck as the deck has an uneven bottom edge.
CUTTER DECK HEIGHT
The cutter deck height adjustment is made to insure that the cutter deck is cutting at the height indicated on the cutting height index gauge. To check for proper deck height, be sure that the mower is on a flat, level surface and the tires are properly inflated.
1. Check the cutter deck cutting height by placing the lanyard pin in the 4-1/2″ position on the cutting height index. Release the deck from the transport position and allow the deck to move to the 4-1/2″ cutting height position.
2. Check the measurement from the floor to the cutter blade tip. If the measurement is not at 4-1/2″, an adjustment can be made using the deck height control rod.
3. Loosen the jam nuts on both ends of the deck height control rod. See Figure 6-8.

LOOSEN HERE

CONTROL ROD

ADJUST HERE

LOOSEN HERE

Figure 6-7. Cutter Deck Pitch Adjustment

Figure 6-8. Cutter Deck Height Adjustment 4. Turn the control rod (See Figure 6-8) until the
measurement from the floor to the cutter blade tip is at 4-1/2″. Tighten the jam nuts on the control rod.
31

Section 6

– NOTE If an adjustment had to be made, be sure that the cutter deck can easily be locked into the transport position.
6.6 CUSTOM-CUT BAFFLE ADJUSTMENT
The Custom-Cut Baffle is designed to deliver optimum airflow and superior cutting performance in any type of grass. The Custom-Cut Baffle can be raised or lowered to precisely tailor the deck’s performance for the type of grass being cut. The baffle can be set in seven (7) different positions for optimum performance.
A. 3-1/2″ or 3-3/4″ Position – (See Figure 6-9). For very tall, wiry or tough- to-cut grass.
B. 4″ (factory setting), 4-1/4″ or 4-1/2″ Position – (See Figure 6-9). For general purpose cutting. This gives the best mix of cutting performance in all types of grass.

C. 4-3/4″ or 5-1/4″ Position – (See Figure 6-9). Placing the baffle in either the 4-3/4″ or 5-1/4″ setting will enhance fall cutting (leaf pickup) and reduce cutter deck “blowout”.
To adjust the Custom-Cut Baffle height:
1. Place the cutter deck in the transport position.
2. Remove the hardware securing the Custom-Cut Baffle to the cutter deck.
– NOTE Hardware location used in the illustrations are for reference only. Location of hardware may vary depending on cutter deck size.
3. Move the Custom-Cut Baffle to desired position. See Figure 6-9.
4. Reinstall the mounting hardware. Torque hardware to 39 lb-ft.

12 34

1 3

2 4

A B

Custom-Cut Baffle Adjustment

Mounting Slot Selected
Slot “A” Height (inches)

Hole 1 3-3/4″

Mounting Hardware Location

Hole 2 4-1/4″

Hole 3 4-3/4″

Hole 4 5-1/4″

Slot “B” Height (inches)

Hole 2 3-1/2″

Hole 3 4″

Hole 4 4-1/2″

Figure 6-9. 7-Position Custom-Cut Baffle Adjustment

Section 6
6.7 ELECTRIC CLUTCH ADJUSTMENT
The electric clutch serves two functions in the operation of the mower. In addition to starting and stopping the power flow to the cutter blades, the clutch also acts as a brake to assist in stopping blade rotation when the PTO is switched off or the operator presence circuit is interrupted.
When the clutch is disengaged, the air gap between the armature and rotor must be adjusted to fifteen thousandths of an inch, 0.015, for proper operation. The airgap adjustment is made at three bolts on the clutch. There are three inspection windows, one next to each adjusting bolt. See Figure 6-10.
INSPECTION WINDOW (x3)

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ADJUSTMENT NUTS

Figure 6-10. Clutch Air Gap Adjustment
1. Locate the inspection windows on the clutch.
2. Place a 0.015 feeler gauge in the slot between the rotor and the armature.
3. Tighten or loosen the adjusting bolt as needed to achieve the 0.015 inch airgap. See Figure 6-11. Perform this operation at all three inspection windows.

ADJUSTMENT NUTS
Figure 6-11. Clutch Air Gap Adjustment
This adjustment should be done every 500 hours of operation or annually, whichever comes first. In cases where the machine is heavily used, airgap settings should be checked more often.
If the air gap is too narrow, the clutch armature may drag when disengaged, resulting in premature failure.
If the air gap is too wide, the clutch may be slow to engage as the magnet must pull the armature in from a greater distance.

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MAINTENANCE
7.1 MAINTENANCE CHART – RECOMMENDED SERVICE INTERVALS

Section 7

HOURS

BREAK-IN (FIRST 10)

20 40 100 200 500

PROCEDURE

Check all hardware for tightness

COMMENTS

Check hydraulic oil level

See paragraph 7.3

Check all belts for proper alignment

See paragraph 7.9

Check coolant level

See paragraph 7.13

Check hydraulic fittings and hoses for Use ex treme caution when

leaks

checking the hydraulic hoses.

See paragraph 2.7

Check LPG fuel system for leaks

See Engine Owners Manual

Check engine oil level

See paragraph 7.4

*Clean mower

See paragraph 7.14

Check condition of blades

See paragraph 7.10

Apply grease to fittings

See paragraph 7.2

Check tire pressure

See paragraph 7.11

Inspect seat belt for wear or damage

See paragraph 2.6

Check the operator interlock system

See paragraph 4.3

Check coolant level

See paragraph 7.13

Change engine oil and filter

See paragraph 7.4

Check battery electrolyte level clean See paragraph 7.8 battery posts and cables

Inspect pump drive belt. Replace every See paragraph 6.4 & 7.9

400 hours or 2 years, whichever occurs

first

Check belts for proper alignment

See paragraph 7.9

Apply grease to fittings

See paragraph 7.2

Change engine oil

See paragraph 7.4

*Clean air cleaner element

See paragraph 7.7

Check lubricant in cutter deck gearbox See paragraph 7.12

Check condition of fuel lines

Perform these maintenance procedures more frequently under extreme dusty or dirty conditions
34

Section 7

MAINTENANCE CHART – RECOMMENDED SERVICE INTERVALS (CONT’D)

BREAK-IN (FIRST 10)

HOURS 8 40 100 200 500

PROCEDURE

COMMENTS

Apply grease to fittings

See paragraph 7.2

Check hardware for tightness

Change engine oil filter

See paragraph 7.4

Check hydraulic oil level

See paragraph 7.3

X Replace engine fuel filter

See paragraph 7.5

X Service LPG fuel system

See paragraph 7.6

Drain hydraulic system and replace Use SAE 20W50 Motor Oil.

hydraulic oil

See paragraph 7.3

X Replace hydraulic oil filter

See paragraph 7.3

R e p l a c e c u t t e r d e c k g e a r b o x See paragraph 7.12 lubricant

X Adjust electric PTO clutch

See paragraph 6.8

X Change coolant

See paragraph 7.13

7.2 LUBRICATION GREASE FITTING LUBRICATION CHART (SEE FIGURE 7-1)

LOCATION
1 Caster Wheel Pivot * 2 Caster Wheel Bearings 3 Cutter Deck Drive Shaft Slip Sleeve 4 Cutter Deck Bellcranks 5 Cutter Deck Pusharms 6 PTO Spindle 7 Cutter Deck Spindle 8 Cutter Deck Drive Shaft U-Joints

LUBRICATION INTERVAL
500 Hours/Yearly 100 Hours/Monthly 40 Hours/Weekly 100 Hours/Bi-Weekly 100 Hours/Bi-Weekly 40 Hours/Weekly 40 Hours/Weekly 200 Hours/Monthly

LUBRICANT
Chassis Grease Chassis Grease Spindle Grease Chassis Grease Chassis Grease Spindle Grease Spindle Grease Chassis Grease

NO. OF PLACES
2 2 1 4 2 1 3 2

+ Compatible Greases:

Scag Premium Chassis Grease p/n 486257 Scag Premium Spindle Grease p/n 486258

PROCEDURE: Remove grease cap, part number 484195. Remove plug, part number 482028-01, and install grease zerk. Apply grease to the fitting until new grease appears at the top of the caster extension. Remove the grease zerk and reinstall the plug. Reinstall the grease cap. Special tool, part number 47007, is recommended for use in the installation of the grease cap.

Section 7

GREASE FITTING LUBRICATION Lubricant Interval
Spindle Grease (40 Hours/Weekly)
Chassis Grease (100 Hours/Bi-monthly)
Chassis Grease (200 Hours/Monthly)
Chassis Grease (500 Hours/Yearly)
4
1

1 2

Figure 7-1. Lubrication Fitting Points

Section 7

7.3 HYDRAULIC SYSTEM

B. CHANGING HYDRAULIC OIL

A. CHECKING HYDRAULIC OIL LEVEL
The hydraulic oil level should be checked after the first 10 hours of operation. Thereafter, check the oil after every 200 hours of machine operation or monthly, whichever occurs first.
– IMPORTANT –
If the oil level is consistently low, check for leaks and correct immediately.
1. Wipe dirt and contaminants from around the reservoir cap. Remove the cap from the hydraulic oil reservoir.
2. Visually check the level of hydraulic oil. Hydraulic oil must be at least 3″ inches from top of the filler neck. If the level cannot be determined visually, use a clean tape measure to check the level. If the fluid is low, add 20W50 oil (Scag p/n 486255 – 1 Quart or p/n 486254 – 1 Gallon). DO NOT overfill; (overfilling the oil reservoir may cause oil seepage around the cap area).
3. Clean the fill cap and install it onto the reservoir.

The hydraulic oil should be changed after every 500 hours or annually, whichever occurs first. The oil should also be changed if the color of the fluid has become black or milky. A black color and/or a rancid odor usually indicates possible overheating of the oil, and a milky color usually indicates water in the hydraulic oil.
– IMPORTANT –
The hydraulic oil should be changed if you notice the presence of water or a rancid odor to the hydraulic oil.
1. Park the mower on a level surface and stop the engine.
2. Place a suitable container under the hydraulic oil filter. Remove the fill cap from the reservoir and the drain plug from the bottom of the drain tee fitting on the filter base. See Figure 7-3. Allow the fluid to drain into the container and properly discard it.

HYDRAULIC OIL FILTER

HYDRAULIC OIL RESERVOIR
Figure 7-2. Hydraulic Oil Reservoir

390S0155-1
Figure 7-3. Hydraulic Oil Filter 3. Re-install the drain plug into the tee fitting and be
sure it is tight.
– NOTE Before refilling the hydraulic oil reservoir the hydraulic oil filter should be changed as outlined in Procedure C “Changing Hydraulic Oil Filter Element” on page 38.
4. Fill the reservoir to 3-1/4″ inches from the top of the filler neck with 20W50 oil (Scag p/n 486255 – 1 Quart or p/n 486254 – 1 Gallon).
37

Section 7

5. Replace the reservoir fill cap. Start the engine and drive forward and backward for two minutes. Check the oil level in the reservoir. If necessary, add oil to the reservoir.
C. CHANGING HYDRAULIC OIL FILTER ELEMENT
The hydraulic oil filter should be changed after every 500 hours of operation or annually, whichever occurs first.
1. Remove the oil filter element and properly discard it. See Figure 7-3. Fill the new filter with clean oil and install the filter. Hand tighten only.
2. Run the engine at idle speed with the speed control lever in neutral for five minutes.
3. Check the oil level in the hydraulic tank. It must be 3″ inches from the top of the filler neck. If necessary, add SAE 20W50 oil (Scag p/n 486255 – 1 Quart or p/n 486254 – 1 Gallon).

B. CHANGING ENGINE CRANKCASE OIL
After the first 20 hours of operation, change the engine crankcase oil and replace the oil filter. Thereafter, change the engine crankcase oil after every 100 hours of operation or bi-weekly, whichever occurs first. See Figure 7-5. Refer to the Engine Operator’s Manual for instructions regarding your specific engine.

7.4 ENGINE OIL

ENGINE OIL FILTER

Figure 7-5. Oil Filter Location Gasoline Engine Shown
C. CHANGING ENGINE OIL FILTER

ENGINE OIL DIPSTICK

After the first 20 hours of operation, replace the engine oil filter. Thereafter, replace the oil filter after every 200 hours of operation or every month, whichever occurs first. See Figure 7-5. Refer to the Engine Operator’s Manual for instructions regarding your specific engine.

Figure 7-4. Engine Oil Fill/Dipstick Location Gasoline Engine Shown
A. CHECKING ENGINE CRANKCASE OIL LEVEL
The engine oil level should be checked after every 8 hours of operation or daily as instructed in the Engine Operator’s Manual furnished with this mower. Refer to the Engine Operators Manual for details regarding your specific engine.

7.5 ENGINE FUEL SYSTEM (GASOLINE &
DIESEL MODELS)
DANGER
To avoid injury from burns, allow the mower to cool before removing the fuel tank cap and refueling.

Section 7

A. FILLING THE FUEL TANK (GASOLINE ENGINE)

Fill to the bottom of the filler neck insert (approximately 12 gallons indicating Full (F) on the fuel gauge) at the beginning of each operating day. See Figure 7-6. Do not overfill. Use clean, fresh unleaded gasoline with a minimum octane rating of 87 and a maximum of 10% Ethanol.
DO NOT use E85 Fuel. Using E85 Fuel will cause severe damage to the engine.

FILLER NECK INSERT

1/.2

1/4.

.3/4

E. .F

FUEL LEVEL

7. Remove the machine from the truck or trailer and fuel on the ground. If this is not possible, then refuel the machine with a portable container, rather than from a gasoline dispenser nozzle.
8. Keep the nozzle in contact with the rim of fuel tank or container opening at all times until fueling is complete. Do not use a nozzle lock-open device.
9. If fuel is spilled on clothing, change clothing immediately and wash affected skin.
10. Replace gas cap and tighten the fuel cap until it ratchets.
B. FILLING THE FUEL TANK (DIESEL ENGINE)
Fill the fuel tank at the beginning of each operating day to within one inch below the filler neck. Do not overfill. Use clean, fresh diesel fuel with a minimum cetane rating of 40.

C. REPLACING IN-LINE FUEL FILTER ELEMENTS (GASOLINE & DIESEL MODELS ONLY)

Figure 7-6. C.A.R.B. / EPA Phase 3 Fuel Level
To avoid personal injury or property damage, use extreme care in handling gasoline. Gasoline is extremely flammable and the vapors are explosive.
1. Extinguish all cigarettes, cigars, pipes and other sources of ignition.
2. Use only an approved gasoline container.
3. Never remove the gas cap or add fuel with the engine running. Allow the engine to completely cool before fueling.
4. Never fuel the machine indoors or in an enclosed trailer.
5. Never store the machine or fuel container where there is an open flame, spark or pilot light such as on a water heater or other appliances.
6. Never fill containers inside a vehicle or on a truck or trailer bed with a plastic liner. Always place containers on the ground away from your vehicle before filling.

The engine fuel filter should be replaced after every 500 hours of operation or annually, whichever occurs first. See Figure 7-7. 1. Close the shut-off valve. 2. Remove the two clamps securing the fuel filter to the
fuel hose. Remove the fuel filter. 3. Install a new fuel filter. Be sure it is installed in the
proper direction. Secure to the fuel hose using the two clamps. 4. Open the fuel shut-off valve.
Fuel Filter (with hose clamps above and below) STT99FF-1
Figure 7-7. Fuel Filter

Section 7

7.6 LPG ENGINE FUEL SYSTEM
DANGER
To avoid injury from burns, allow the mower to cool before removing the LP fuel tank.
Maintenance must be performed to the LPG fuel system after 1000 hours of operation or annually, whichever occurs first. Contact your authorized Scag service center for details and maintenance. See Engine Owner’s manual for service information
1. Secure loose cylinders when transporting. Transport in the upright position.
2. Fill at a reputable dealer. 3. Do not store tanks (empty or filled) inside any
building or enclosed trailer. 4. Turn off valve at tank during machine storage.

CAUTION
It is important that anyone who changes or uses this cylinder be aware of its dangerous potential and use it only in compliance with all applicable governmental regulations including NFPA No.58
5. Cylinders that show excessive denting, bulging, gouging or corrosion shall be removed from service.
6. Do not dispose of cylinders without assistance of qualified propane personnel.
– NOTE LP cylinders must be vapor withdrawal type (identified by green band on tank) designed for horizontal mounting on machine with LH threaded disconnect coupler.
7. Replacement cylinders must meet requirements of original cylinders.
8. Refuel outdoors.

WARNING
DO NOT overfill. Follow approved procedures for filling.
This cylinder is designed to contain LP Gas; a flammable liquid and gas under pressure.
DO NOT expose to fire or heat above 120 degrees Farenheit.
Be sure all fittings are tight and leak proof.
DO NOT attempt repairs. Contact an authorized LP Gas Dealer.

7.7 ENGINE AIR CLEANER
A. CLEANING AND/OR REPLACING AIR CLEANER ELEMENT
For any air cleaner, the operating environment dictates the air cleaner service periods. Inspect and clean the air cleaner element after every 100 hours of operation or bi-weekly, whichever occurs first and replace the element if required. See Engine Owner’s Manual for service information.
– NOTE In extremely dusty conditions it may be necessary to check the element once or twice daily to prevent engine damage.

Cylinder must be retested within 12 years of manufacture date.

1. Unhook the clamps securing the air cleaner cover to the air filter canister. Remove the air cleaner cover and set aside.
2. Remove the air cleaner and inspect.
3. Clean or replace the air cleaner and foam pre-cleaner as recommended by the engine manufacturer.
4. Replace the air cleaner cover and be sure to snap the latches closed.
40

Section 7

7.8 BATTERY

A. CHARGING THE BATTERY

WARNING
Lead-acid batteries produce flammable and explosive gases. To avoid personal injury when checking, testing or charging batteries, DO NOT use smoking materials near batteries. Keep arcs, sparks and flames away from batteries. Provide proper ventilation and wear safety glasses.
WARNING

Refer to the battery charger ‘s manual for specific instructions.
Under normal conditions the engine’s alternator will have no problem keeping a charge on the battery. If the battery has been completely discharged for a long period of time, the alternator may not be able to recharge the battery, and a battery charger will be required.
DO NOT charge a frozen battery. It may explode and cause injury. Let the battery warm before attaching a charger.
Whenever possible, remove the battery from the mower before charging and make sure the electrolyte covers the plates in all cells.

Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to cause cancer and reproductive harm. Wash hands after handling.
WARNING
Electric storage battery fluid contains sulfuric acid which is POISON and can cause SEVERE CHEMICAL BURNS. Avoid contact of fluid with eyes, skin, or clothing. Use proper protective gear when handling batteries. DO NOT tip any battery beyond 45° angle in any direction. If fluid contact does occur, follow first aid suggestions below.
BATTERY ELECTROLYTE FIRST AID
External Contact — Flush with water.
Eyes — Flush with water for at least 15 minutes and get medical attention immediately.
Internal — Drink large quantities of water. Follow with Milk Of Magnesia, beaten egg, or vegetable oil. Get medical attention immediately. In case of internal contact, DO NOT give fluids that would induce vomiting.

WARNING
BAT TERIES PRODUCE EXPLOSIVE GASES. Charge the battery in a well ventilated space so gases produced while charging can dissipate.
Charging rates between 3 and 50 amperes are satisfactory if excessive gassing or spewing of electrolyte does not occur or the battery does not feel excessively hot (over 125°F). If spewing or gassing occurs or the temperature exceeds 125°F, the charging rate must be reduced or temporarily stopped to permit cooling.
B. JUMP STARTING
1. The booster battery must be a 12 volt type. If a vehicle is used for jump starting, it must have a negative ground system.
2. When connecting the jumper cables, connect the positive cable to the positive battery post, then connect the negative cable to the negative battery post.
7.9 DRIVE BELTS
All drive belts are spring-loaded and self-tensioning, however after the first 2, 4, 8 and 10 hours of operation, the belts should be checked for proper alignment and wear. Thereafter, check the belts after every 40 hours of operation or weekly, whichever occurs first.

Section 7

– NOTE If you experience frequent belt wear or breakage, see your authorized Scag service center for belt adjustment.
WARNING
If the pump drive belt fails, steering control will be lost which could result in serious injury or death. Replace the pump drive belt as needed or every 400 hours / 2 years, whichever occurs first.
7.10 CUTTER BLADES
A. BLADE INSPECTION
1. Remove the ignition key before servicing the blades. 2. Raise the mower deck to the highest position. Place
the lanyard pin in the highest cutting height position to prevent the cutter deck from falling.
WARNING
Always wear proper hand and eye protection when working with cutter blades.
3. Check the cutter blades for straightness. If the cutter blades appear bent, they will need to be replaced.
4. Check the cutter blades for wear. If any part of the cutter blade is worn to 1/2 its original thickness, replace the cutter blade.
WARNING
Do not attempt to straighten a bent blade, and never weld a broken or cracked blade. Always replace it with a new blade to assure safety.
5. Check the cutter blades for gouges. If there are gouges on the top or bottom surfaces of the cutter blade, replace the cutter blade.
6. If a blade cutting edge is dull or nicked, it should be sharpened. Remove the blades for sharpening. See “Blade Replacement.”

– NOTE –
Keep the blades sharp. Cutting with dull blades not only yields a poor mowing job, but slows the cutting speed of the mower and causes extra wear on the engine and the blade drive by pulling hard.

B. BLADE SHARPENING

– NOTE –
If possible, use a file to sharpen the blade. Using a wheel grinder may burn the blade.

– NOTE –
DO NOT sharpen the blades beyond 1/3 of the width of the blade. See Figure 7-8.
1. Sharpen the cutting edge at the same bevel as the original. See Figure 7-8. Sharpen only the top of the cutting edge to maintain sharpness.

Do Not Cut In

Angle Blade Back

X Must NOT Exceed

1/3 Blade Width

SGB033

Figure 7-8. Blade Sharpening
2. Check the balance of the blade. If the blades are out of balance, vibration and premature wear can occur. The cutter blades should be balanced to 1-1/2 oz-in. See your authorized Scag dealer for blade balancing or special tools, if you choose to balance your own blades.

C. BLADE REPLACEMENT

WARNING
Always wear proper hand and eye protection when working with cutter blades.
1. Remove the ignition key before replacing the blades.

Section 7
2. Raise the mower deck to the highest position. Place the lanyard pin in the highest cutting height position to prevent the cutter deck from falling.
3. Secure the cutter blades to prevent them from rotating, (use the optional Blade Buddy tool P/N 9212, to assist in securing the cutter blades), remove the nut from the blade attaching bolt. Remove the cutter blade, bolt and spacer from the spindle shaft. See Figure 7-9.
– NOTE The front of the machine will have to be raised slightly to remove the blade bolt from the cutter spindle.
CAUTION
Inspect the cutter blade spacer(s) and washer for wear and/or cupping. Replace the worn parts. Worn spacer(s) and/or washer will not allow proper tightening of the cutter blade and can lead to cutter blade failure, personal injury or property damage.
4. To install the new cutter blade, put the flat washer onto the blade bolt and slide the bolt into the hole in the cutter blade.

R
H EX N U T-TO R Q U E TO 75 LB-FT

SPIN D LE SH AFT

C U TTER DECK

SPIN D LE ASSEM BLY

HEX HEAD BO LT /N U T
C U TTER BLAD E SPACER

W ASHER

H EX H EAD BO LT

C U TTER BLAD E

Figure 7-9. Blade Replacement
– NOTE Be sure that the blade is installed with the lift wing toward the top.
5. Install the spacer onto the blade bolt and insert the bolt into the cutter spindle shaft.
6. Install the hex nut to the blade bolt at the top of the cutter spindle. Secure the blades from rotating and torque to 75 lb-ft. See Figure 7-9.
7.11 TIRES

Check the tire pressures after every 8 hours of operation or daily.

Caster Wheels Drive Wheels

Flat Free 8 PSI

Section 7

7.12 CUTTER DECK GEARBOX
A. CHECKING LUBRICANT LEVEL
CAUTION
The cutter deck gearbox can reach high operating temperatures. Allow the cutter deck gearbox to cool before servicing.

1. Place a suitable container beneath the cutter deck gearbox and locate the gearbox drain plug.
2. Remove the drain plug, drain the lubricant into the container and properly discard it.
3. Re-install the drain plug and add Scag 75W90 lubricant (p/n 486578) through the check plug hole in the gearbox until it is level with the bottom of the check plug hole. Install the check plug and tighten securely.
7.13 COOLING SYSTEM

The fluid level in the cutter deck gearbox should be checked after every 100 hours of operation or bi-weekly, whichever occurs first.
1. Lower the cutter deck to to its lowest position to gain access to the cutter deck gearbox.
2. Clean and remove the check plug from the side of the gearbox. See Figure 7-10.

(LIQUID-COOLED MACHINES ONLY)
WARNING
To avoid burns, always allow the engine to cool before removing the radiator cap.

A. CHECKING COOLANT LEVEL

CHECK PLU G

C U TTER D EC K G EARBO X
390S0161

Figure 7-10. Cutter Deck Gearbox

3. Visually check that the lubricant level is up to the bottom edge of the check plug hole. If lubricant is low, add SAE 80W90 or if replaced with Scag 75W90 lubricant (p/n 486578) add 75W90 lubricant (p/n 486578) through the check plug hole in the gearbox until it is level with the bottom of the check plug hole. Install the check plug and tighten securely.

B. CHANGING LUBRICANT

The coolant level should be checked before each day of operation.
1. Remove the radiator cap by turning it slowly counterclockwise to the first stop and allow any pressure to be released. Push down on the cap and turn counterclockwise to remove.
2. Visually check the coolant level. The coolant level should be up to the bottom of the filler neck as shown in Figure 7-11. Add a mixture of coolant and soft water as needed.
– NOTE –
Refer to the coolant manufacturer’s instructions for the proper coolant mixture ratio.

The lubricant in the cutter deck gearbox should be changed after every 500 hours of operation or yearly, whichever occurs first.

Section 7

Fill to Bottom of Filler Neck

R
C. CHECKING THE FAN BELT TENSION (LIQUIDCOOLED ENGINES ONLY)
Periodically check the fan belt tension. The belt should deflect 1/2″ with 10 pounds of pressure. See your Scag dealer if the belt is in need of adjustment or replacement.
7.14 BODY, DECK, AND UPHOLSTERY

030467-13
Figure 7-11. Coolant Level 3. Replace the radiator cap. Push down on the cap and
turn clockwise until it stops.
– NOTE The cooling system should be flushed and the coolant replaced every 500 hours of operation or annually. See your Scag dealer for proper coolant replacement.
B. CLEANING THE RADIATOR DEBRIS SCREEN
After each day of operation, remove and clean the radiator debris screen.

CAUTION
Do not wash any portion of the equipment while it is hot. Do not wash the engine; use compressed air.
1. After each use, wash the mower and cutter deck. Use cold water and automotive cleaners. Do not use pressure cleaners.
2. Do not spray electrical components.
3. Use a mild soap solution or a vinyl/rubber cleaner to clean the seat.
4. Repair damaged metal surfaces using Scag touchup paint available from your authorized Scag dealer. Wax the mower for maximum paint protection.

CAUTION

To avoid personal injury, always wear safety glasses when using compressed air.

1. Pull the debris screen up to remove.
2. Clean the debris screen with compressed air or a water hose.
– NOTE Check the radiator for excessive debris and clean with compressed air. Never spray a hot engine with water, use only compressed air to remove debris.
3. Re-install the debris screen to the radiator.

R
ILLUSTRATED PARTS LIST

Section 8

8.1 SCAG APPROVED ATTACHMENTS AND ACCESSORIES
Attachments and accessories manufactured by companies other than Scag Power Equipment are not approved for use on this machine.
Scag approved attachments and accessories:
· GC-3B (p/n 901S) – Requires a 901R (52 STTII Install Kit) or 900X (61 STTII/SCZ Install Kit) · GC-CS (p/n 901T) – Requires a 901R (52 STTII Install Kit) or 900X (61 STTII/SCZ Install Kit) GC-CS (p/n 901T) – Not applicable to machines equipped with LP engines.
· Mulch Plate (52,61,72)(p/n 9287, 9288, 920F) · Hurricane Mulch (52,61,72)(p/n 9284, 9285, 920E) · STTII-OCDC-52V (p/n 923C) · SCZ/STT/STTII- OCDC-61V (p/n 923D) · SZL / SFZ / SPZ / STT/STTII Hitch (p/n 9242) · STT Bumper (p/n 9256) · STTII Lights (p/n 923E) · STTII LED Lights (p/n 923Y) · Tiger Striper (p/n 923G) – Requires a 923H Install Kit · Air Filter Indicator (922U) · Blade Buddy (p/n 9212)
Scag Premium Lubricants:
· Chassis Grease (p/n 486257) · Spindle Grease (p/n 486258) · 20W50 Oil – Gallon (p/n 486254) · 20W50 Oil – Quart (p/n 486255) · 75W90 Gear Lubricant (p/n 486578)

Section 8

NOTES

Section 8

13 14

72
68 69

38 73 75 71
70
34
25 68
67 66

STTII 52V CUTTER DECK

3 4

3 11

2 3

4 5
6

2 12 3
4

15 8
16 11
17

12 18

78
77 76
38

83
16 79 81
17

20 30

32 31

80 33 34

23 24

22 26
28
A
85 36

25 27

References

Scag Power Equipment: Commercial Lawn Mowers and More

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SCAG POWER EQUIPMENT STTII-52V-31BV Rippeon Equipment Co Maryland Instruction Manual

STTII-52V-31BV Rippeon Equipment Co Maryland

Specifications

Product Usage Instructions

Section 1 – General Information

Section 2 – Safety Information

Section 4 – Operating Instructions

Section 5 – Troubleshooting Cutting Conditions

Section 6 – Adjustments

Section 7 – Maintenance

Section 8 – Illustrated Parts List

FAQ

Q: How often should I sharpen the mower blades?

Q: What type of fuel should I use for my Scag mower?

Q: Can I wash my mower with a pressure washer?

References

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SCAG POWER EQUIPMENT User Manuals

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