PRO MAX450 Leaf and Lawn Vacuum

DR® LEAF & LAWN VACUUM SAFETY & OPERATING INSTRUCTIONS

Model: PRO MAX450

Serial No. Order No.

DR Power Equipment Toll-free phone: 1-800-DR-OWNER (376-9637) Website: www.DRpower.com

Read and understand this manual and all instructions before operating the DCRONLTEAACFTaUnSdALTAwWwNwV.DARCpUoUwMe.r.com 1

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DR® LEAF & LAWN VACUUM

Table of Contents
Conventions used in this manual ……………………………………………………………………………………………………………………. 5 Serial Number and Order Number………………………………………………………………………………………………………………….. 5 Additional Information and Potential Changes…………………………………………………………………………………………………. 5 California Proposition 65 ……………………………………………………………………………………………………………………………….. 5
Chapter 1: General Safety Rules …………………………………………………………………………………………………………………………………. 6
Labels 6 Protecting Yourself and Those around You ……………………………………………………………………………………………………… 7 Safety for Children and Pets……………………………………………………………………………………………………………………………. 7 Safety with Gasoline- Powered Machines………………………………………………………………………………………………………….. 7 Safety with Gasoline-Powered Machines (continued) ……………………………………………………………………………………….. 7 Slope Operation ……………………………………………………………………………………………………………………………………………. 8 General Safety……………………………………………………………………………………………………………………………………………….. 8
Chapter 2: Setting Up the DR PRO MAX450TM LEAF and LAWN VACUUM ……………………………………………………………………….. 11
DR PRO MAX450TM LEAF and LAWN VACUUM Controls and Features ……………………………………………………………. 11 Specifications ……………………………………………………………………………………………………………………………………………… 11 Assembly Parts Identification ……………………………………………………………………………………………………………………….. 13 Installing the Wheels……………………………………………………………………………………………………………………………………. 15 Installing the Collector Base …………………………………………………………………………………………………………………………. 16 Assembling and Installing the Power Unit ……………………………………………………………………………………………………… 16 Assembling the Collector ……………………………………………………………………………………………………………………………… 17 Installing the Inlet Hose……………………………………………………………………………………………………………………………….. 23 Setting up your Lawn Mower ………………………………………………………………………………………………………………………… 25 Hitch Plate Kit Installation (optional) …………………………………………………………………………………………………………….. 25 Deck Adapter Installation……………………………………………………………………………………………………………………………… 25 Connecting the DR PRO MAX450TM LEAF and LAWN VACUUM to your Mower ……………………………………………….. 25 Connecting the Inlet Hose to the Deck Adapter ……………………………………………………………………………………………… 26 Adding the Engine Oil and Gasoline ……………………………………………………………………………………………………………… 27 Adding Oil ………………………………………………………………………………………………………………………………………………….. 27 Adding Gasoline ………………………………………………………………………………………………………………………………………….. 27 Tire Pressure Check……………………………………………………………………………………………………………………………………… 28
Chapter 3: Operating the DR PRO MAX450TM LEAF AND LAWN VACUUM………………………………………………………………………. 29
Before Starting the Engine ……………………………………………………………………………………………………………………………. 29 Starting and Stopping the Engine………………………………………………………………………………………………………………….. 29 Operating Safety ………………………………………………………………………………………………………………………………………….. 30 Towing the DR PRO MAX450TM LEAF and LAWN VACUUM ……………………………………………………………………………. 30 Towing Safety ……………………………………………………………………………………………………………………………………………… 31 Slopes and Uneven Terrain…………………………………………………………………………………………………………………………… 31 LEAF and LAWN VACUUM Tips……………………………………………………………………………………………………………………. 31 Dumping…………………………………………………………………………………………………………………………………………………….. 32 Converting to Flatbed Trailer Mode……………………………………………………………………………………………………………….. 34 Using the Flatbed Trailer………………………………………………………………………………………………………………………………. 35 Collapsing the Collector for Compact Storage ………………………………………………………………………………………………… 36
Chapter 4: Maintaining the DR PRO MAX450TM LEAF and LAWN VACUUM …………………………………………………………………….. 37
Regular Maintenance Checklist …………………………………………………………………………………………………………………….. 37 Lubrication………………………………………………………………………………………………………………………………………………….. 37 LUBRICATE WHEEL BEARINGS:…………………………………………………………………………………………………………………… 37 REMOVING AND REPLACING THE ENGINE OIL………………………………………………………………………………………….. 38 Replacing the Wheels …………………………………………………………………………………………………………………………………… 38 Impeller Maintenance ………………………………………………………………………………………………………………………………….. 38 Battery Care ………………………………………………………………………………………………………………………………………………… 39 Charging the Battery…………………………………………………………………………………………………………………………………….. 39 Replacing the Battery …………………………………………………………………………………………………………………………………… 40 Disposing of the Battery Responsibly (Electric-Start Models)…………………………………………………………………………… 40 Recycling a Used Battery ………………………………………………………………………………………………………………………………. 40
Chapter 5: Troubleshooting……………………………………………………………………………………………………………………………………….. 41
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Troubleshooting Table …………………………………………………………………………………………………………………………………. 41 Troubleshooting Table (Continued) ………………………………………………………………………………………………………………. 42
Chapter 6: Parts Lists and Schematic Diagrams ……………………………………………………………………………………………………………. 43
Parts List ­ FRAME AND BED ASSEMBLY …………………………………………………………………………………………………….. 43 Schematic ­ FRAME AND BED ASSEMBLYParts List ­ POWER UNIT ASSEMBLY ……………………………………………. 44 Schematic ­ POWER UNIT ASSEMBLYParts List ­ COLLECTOR ASSEMBLY ……………………………………………………. 46 Schematic ­ COLLECTOR ASSEMBLY Parts List and Schematic ­ HOSE ASSEMBLY ……………………………………….. 48 Daily Checklist for the DR PRO MAX450TM LEAF and LAWN VACUUM…………………………………………………………….. 50 End of Season and Storage …………………………………………………………………………………………………………………………… 51

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DR® LEAF & LAWN VACUUM

Conventions used in this manual
This indicates a hazardous situation, which, if not avoided, could result in death or serious injury.
This indicates a hazardous situation, which, if not avoided, could result in minor or moderate injury.
This information is important in the proper use of your machine. Failure to follow this instruction could result in damage to your machine or property.
Serial Number and Order Number
A Serial Number is used to identify your machine and is located on the Serial Number Label on your machine. An Order Number is used to check and maintain your order history and is located on your packing slip. For your convenience and ready reference, enter the Serial Number and Order Number in the space provided on the front cover of this manual.
Additional Information and Potential Changes
DR Power Equipment reserves the right to discontinue, change, and improve its products at any time without notice or obligation to the purchaser. The descriptions and specifications contained in this manual were in effect at printing. Equipment described within this manual may be optional. Some illustrations may not be applicable to your machine.
California Proposition 65
CONTACT US AT www.DRpower.com 5

Chapter 1: General Safety Rules

Read this Safety & Operating Instructions manual before you use the DR LEAF and LAWN VACUUM. Become familiar with the operation and service recommendations to ensure the best performance from your machine. If you have any questions or need assistance, please contact us at www.DRpower.com or call toll-free 1-800-DR-OWNER (376-9637) and one of our Technical Support Representatives will be happy to help you.
Labels
Your DR PRO MAX450TM LEAF and LAWN VACUUM carries prominent labels as reminders for its proper and safe use. Shown below are copies of all the Safety and Information labels that appear on the equipment. Take a moment to study them and make a note of their location on your machine as you set up and before you operate the unit. Replace damaged or missing safety and information labels immediately.

372291

188871

137581

342781

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DR® LEAF & LAWN VACUUM

388491 #A0002163843

388501

Protecting Yourself and Those around You
This is a high-powered machine, with moving parts operating with high energy at high speeds. You must use proper clothing and safety gear when operating this machine to prevent or minimize the risk of severe injury. This machine can cut and sever parts of your body if they come in contact with the moving impeller blades. Always take the following precautions when operating this machine:
· Always wear protective goggles, or safety glasses with side shields, while operating either your tractor lawn deck, the vacuum
system, or when performing adjustments to your DR Leaf and Lawn Vacuum, to protect your eyes from possible foreign objects thrown from the machine.
· Avoid wearing loose clothing or jewelry, which can catch on the machine’s moving parts. · We recommend wearing gloves while using your DR Leaf and Lawn Vacuum. Be sure your gloves fit properly and do not have
loose cuffs or drawstrings.
· Wear shoes with non-slip treads when using your DR Leaf and Lawn Vacuum. If you have safety shoes, we recommend
wearing them. Do not use the machine while barefoot or wearing open sandals.
· Wear long pants while operating your DR Leaf and Lawn Vacuum. · Use ear protectors or earplugs rated for at least 20 dba to protect your hearing.
Safety for Children and Pets
Tragic accidents can occur if the operator is not alert to the presence of children and pets. Children and pets are often attracted to the machine and the vacuuming activity. Never assume that children or pets will remain where you last saw them. Always follow these precautions:
· Keep children and pets at least 100 feet from the working area and ensure they are under the watchful care of a responsible
adult.
· Be alert and always turn off the lawn tractor engine and the DR Leaf and Lawn Vacuum engine if children or pets enter the
work area.
· Before and while moving backwards, look behind and down for small children and pets. You cannot see directly behind the
collector box.
· Never allow children to operate your Lawn Tractor or Vacuum. · Never allow children or pets to play in the collector. If they become trapped in the enclosure, they may be exposed to
temperatures similar to leaving a child or pet in a car with the windows closed on a sunny day.
· Use extra care when approaching blind corners, shrubs, trees, or other objects that may obscure your vision.
Safety with Gasoline-Powered Machines
Gasoline is a highly flammable liquid. Gasoline also gives off flammable vapor that can easily ignite and cause a fire or explosion. Never overlook the hazards of gasoline. Always follow these precautions:
· Never run the engine in an enclosed area or without proper ventilation as the exhaust from the engine contains carbon
monoxide, which is an odorless, tasteless and deadly poisonous gas.
· Store all fuel and oil in containers specifically designed and approved for this purpose, and keep away from heat and open
flame, and out of the reach of children.
· Replace rubber fuel lines and grommets when worn or damaged, and after 5 years of use. · Fill the gasoline tank outdoors with the engine off and completely cooled. Don’t handle gasoline if you or anyone nearby is
smoking, or if you’re near anything that could cause it to ignite or explode. Reinstall the fuel tank cap and fuel container cap securely.
CONTACT US AT www.DRpower.com 7

Safety with Gasoline-Powered Machines (continued)

· If you spill gasoline, do not attempt to start the engine. Move the machine away from the area of the spill and avoid creating
any source of ignition until the gas vapors have dissipated. Wipe up any spilled fuel to prevent a fire hazard and properly dispose of the waste.
· Empty the collector box and allow the engine to cool completely before storing your DR Leaf and Lawn Vacuum in any
enclosure. Remember, decomposing material can generate heat and start a fire. Never store the machine with gas in the tank or a fuel container, near an open flame or spark such as a water heater, space heater, clothes dryer, or furnace.
· Never make adjustments or repairs with the engine running. Shut down the engine and disconnect the spark plug wire,
keeping it away from the spark plug to prevent accidental starting. Wait 5 minutes before making adjustments or repairs.
· Never tamper with the engine’s governor setting. The governor controls the maximum safe operation speed and protects the
engine. Over-speeding the engine is dangerous and will cause damage to the engine and to the other moving parts of the machine. If required, see your authorized dealer for engine governor adjustments.
· Keep your hands and combustible substances away from the engine when it is hot. Clean the engine area after each use. · To reduce fire hazard, keep the engine cooling fins and muffler area free of debris build-up such as leaves, grass, oil, grease,
or any other combustible material.
· Never cover the machine while the muffler is still hot. · Do not operate the engine with the air cleaner or the carburetor air intake cover removed, except for adjustment. Removal of
such parts could create a fire hazard.
· Do not use flammable solutions to clean the air filter. · The muffler and engine become very hot and can cause a severe burn; do not touch. · The exhaust area on the engine becomes very hot with use. Allow the engine to cool before doing maintenance or making
adjustments.
Slope Operation

Slopes are a major factor related to tip over accidents, which can result in severe injury. All slopes require caution. If you feel uneasy on a slope, do not vacuum it. Always take the following precautions when using this machine on slopes: ALWAYS:
· Vacuum up and down the face of slopes, never across. Exercise extreme caution when changing direction on slopes. · Remove objects such as stones, glass, and metal objects such as cans. · Watch out for holes, ruts, or bumps. Tall grass can hide obstacles.
NEVER:
· Never vacuum near drop-offs, ditches, or embankments. Your tractor and the vacuum may tip over. · Never vacuum on slopes greater than 15 degrees or any excessively steep slopes. · Never vacuum on wet slopes. Reduced traction could result in slipping and a possible roll over.
General Safety

This is a high-powered machine, with moving parts operating with high energy at high speeds. You must operate the machine safely. Unsafe operation can create a number of hazards for you, as well as anyone else in the nearby area. Always take the following precautions when using this machine:
· Never allow people who are unfamiliar with these instructions to use the DR Leaf and Lawn Vacuum. · To be safe, do not operate the machine near small children or pets, and never allow children to operate the vacuum. Stop the
vacuum and tractor engine when another person or pet approaches.
· Never allow people or pets to ride in the collector box or on the frame.

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DR® LEAF & LAWN VACUUM

· Never run the vacuum engine unless the chute, fabric collector sleeve, and hose are each securely in place and the engine
frame is secured to the main frame.
· Check behind your DR Leaf and Lawn Vacuum before backing up. You cannot see directly behind the collector box. · Never attempt to open or empty the collector while the lawn tractor deck is engaged or the DR Leaf and Lawn Vacuum engine
is running. Debris may exit at high velocity as you begin to open the collector.
· Do not operate in sandy areas where you will vacuum large quantities of sand. Sand will erode the vacuum housing. Check
for holes after each use and replace the housing and liner when holes develop.
· Never operate the machine on slopes greater than 15 degrees. · Never tow the DR Leaf and Lawn Vacuum faster than 8 mph. · Always shut off the lawn tractor engine and the DR Leaf and Lawn Vacuum engine and disconnect the spark plug wire before
attempting to clear any obstructions from the hose.
· Use the DR Leaf and Lawn Vacuum only in daylight. · Never straddle or reach over the engine area at any time. · Use only your hands to operate the DR Leaf and Lawn Vacuum engine controls. · Do not, under any conditions, remove, bend, cut, fit, weld, or otherwise alter standard parts on the DR Leaf and Lawn
Vacuum. Modifications to your machine could cause personal injuries and will void your warranty.
· Do not alter or tamper with safety devices or shields. Make sure they are in their proper position. · While using the DR Leaf and Lawn Vacuum, do not hurry or take things for granted. · Never leave the DR Leaf and Lawn Vacuum unattended with its engine running. · Do not operate the machine when under the influence of alcohol, drugs, or medication.
The DR Leaf and Lawn Vacuum must be operated safely to prevent or minimize the risk of minor or moderate injury. Unsafe operation can create a number of hazards for you. Always take the following precautions when operating this machine:
· Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people, their property, and
themselves.
· Never use the DR Leaf and Lawn Vacuum to vacuum anything but yard waste, such as leaves, grass, small twigs and pine
cones.
· If the machine starts to make an unusual noise or vibration, immediately shut off the engine, disconnect the spark plug wire,
and allow all moving parts to come to a complete stop and cool. Inspect for clogging or damage. Clean and repair and/or replace damaged parts.
· See manufacturer’s instructions for proper operation and installation of accessories. Only use accessories approved by DR
Power Equipment.
· Always keep the equipment in good, safe operating condition. Always make certain nuts and bolts are tight and always use
the supplied self-locking hardware; do not substitute.
· For best performance we recommended that you operate your Leaf and Lawn Vacuum in temperatures 40°F and above.
A Note to All Users
Under California law, and the laws of some other states, you are not permitted to operate an internal combustion engine using hydrocarbon fuels without an engine spark arrester. This also applies to operation on US Forest Lands. All DR® PRO MAX450TM LEAF and LAWN VACUUMS shipped to California, New Mexico and Washington State are provided with spark arresters. Failure of the owner or operator to maintain this equipment in compliance with state regulations is a misdemeanor under California law and may be in violation of other state and/or federal regulations. Contact your State Park Association or the appropriate state organization for specific information in your area.
CONTACT US AT www.DRpower.com 9

No list of warnings and cautions can be all-inclusive. If situations occur that are not covered by this manual, the operator must apply common sense and operate this DR® PRO MAX450TM LEAF and LAWN VACUUM in a safe manner. Contact us at
www.DRpower.com or call 1-800-DR-OWNER (376-9637) for assistance.

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DR® LEAF & LAWN VACUUM

Chapter 2: Setting Up the DR PRO MAX450TM LEAF and LAWN VACUUM
It may be helpful to familiarize yourself with the controls and features of your DR PRO MAX450TM LEAF and LAWN VACUUM as shown in Figure 1 before beginning these procedures. If you have any questions at all, please feel free to contact us at www.DRpower.com.

DR PRO MAX450TM LEAF and LAWN VACUUM Controls and Features

Collector

Collector Sleeve

Controls Hose Support

Outlet Chute

Tow Hitch Inlet Hose with Cuff

Power Unit Wheels
Jack

Air Filter

Dump Actuator
Muffler

Collector Base
Pneumatic Tires
Gas Fill

Throttle Choke

Gas Shut-Off Starter Recoil Handle

On/Off Switch

Figure 1

CONTACT US AT www.DRpower.com 11

Specifications

Engine Displacement Cylinders HP Ft-lbs Torque Starting RPM Cooling Fuel Tank Capacity Oil Capacity Oil Type
Impeller Vanes Weight Mount
Vacuum Hose
Collector Volume Capacity Weight Capacity Fabric Enclosure Dump Tilt Base
Frame
Impeller Housing
Wheels Quantity Tire Size Battery
Jack Lawn Mower Recommendations Lawn Mower Hitch Dimensions Tongue Weight Machine Weight

DR Power Equipment R390 389 cc 1 (w/cast iron sleeve) 11.7 16.90 Electric w/ Recoil Backup 3800 Air 6.9 qt 37.2 oz SAE 30W HD Welded Steel 5 Curved 3.5″ High x .16″ Thick Steel 13.2 Lbs Keyless Tapered Direct Engine Mount Impeller Driven 8″ ID x .035″ Wall PVC, 72″ L Over-center Tilt Design w/ Flatbed Base 60 Cu ft, 450 Gallons 1100 Lbs 1800 Denier Polyester, Solution Dyed, Bonded PVC 60° Flatbed, Steel
Welded Steel, 2 Piece Modular Design
Steel Scroll (.12″ Thick), Sideplate (.12″ Thick)
Pneumatic 5.30/4.50-8 4 Ply w/Tube 4 (2 Per Side) 14″ Diameter x 4.5″ Wide 12 Volt 9 Amp, Spade Terminals Standard Equipment 12 HP Min Flat Terrain otherwise 14 HP (right discharge
Pin Hitch 8″ to 15″ from the Ground 92.5″ (long) x 46.5″ (wide) x 66″ (tall) 127 Lbs. (empty) 325 Lbs (empty)

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DR® LEAF & LAWN VACUUM

Assembly Parts Identification
Compare the contents of the Shipping Box with the Parts Supplied lists and Figures 2 thru 7 below. If there are any questions contact us at www.DRpower.com or call 1-800-DR-OWNER (376-9637).

Hose

11

Assembly 11

13

14

4

15

12

3 11

2

10

8

9
7 1

5 6

Rear Frame and Collector Base Assembly

Power Unit

17 16

Figure 2

Parts Box

Parts supplied (Figure 2 and list below), Parts box contents listed on following page:

Item #Part #

Description

Qty

1 ……..A0001234651 2 ……..A0001234667 3 ……..342561 4 ……..A0001234650 5 ……..337941 6 ……..342441 7 ……..A0002325649 8 ……..A0001725342

Tube Frame, Top Front ……………… 1 Tube Frame, Top Rear ………………. 1 Axle …………………………………………. 1 Tube, Collector, Side Frame ………. 2 Wheel & Tire, 14X 5.3/4.50-8, 4 Ply 4 Rod, Support Hose …………………… 1 Chute w/Label, Impeller Outlet ….. 1 Insert, Metal, Enclosure…………….. 1

9 …….. 342481 …………..Cuff, Hose, 8″ ……………………………1

10 …… 337971

Clamp, Hose, 8″, Thumbscrew ……1

11 …… 337961

Clamp, Hose, 8″, LH Bridge………..4

12 …… 351981

Coupling …………………………………… 1

13 …… 337951

Hose, 8″ID x 72″ Long, PVC………..1

14 …… A0001721719 Enclosure, Fabric ……………………….1

15 …… A0001234669 Base, Collector …………………………..1

16 …… 361201

Batten, FRP, 0.58″ X 0.12″ X 40″ ….2

17 …… A0001234675 Batten, FRP, 0.58″ X 0.12″ X 47″ ….4

CONTACT US AT www.DRpower.com 13

1
7
6 Figure 3
2 1 10
9 8

2

Parts Box (Figure 3):

Item # Part #

Description

Qty

1 ……….. A0000926593……..Bracket, Tube, Rear………………………………. 2 3 2 ……….. A0001055802……..Bracket, Tube, Front …………………………….. 2
3 ……….. 342471………………Strap, Rubber………………………………………. 1 …………. 350421………………Hook, Strap…………………………………………. 2 4 ……….. 388601………………Knob Set……………………………………………… 1 5 ……….. 350211………………Wheels Hardware Set …………………………… 1 6 ……….. 388671………………Power Unit Hardware Set……………………… 1 7 ……….. 370361………………Funnel, Oil Flexible (snap together) ………. 1

5

4

Product Package

3 5

Hardware in Product Package (Figure 4):

Item # Part #

Description

Qty

1 …………. 211541 …………….Pin, Clevis, 1/2″ X 3.5″L, ZP………………………2 2 …………. 350371 …………….Bolt, Hex, 7/16-20, Impeller Tool……………….1 4 3 …………. A0000253563……Pin, Clevis, 1/2 x 4.5″L, ZP ………………………..1

4 …………. A0001681944……Bolt, Carriage, 5/16-18 X 2-3/4, GR5, ZP……6 5 …………. 189671 …………….Washer, Rubber, 1/2″ ID, 1″ OD ……………….1 6 …………. 350271 …………….Bolt, C-Head, 5/16-18 X 1.75″, ZP ……………..4 7 …………. 333321 …………….Nut- Nylon Lock Flanged 5/16-18……………….6 8 …………. 110761 …………….Nut, Nylon Lock, 5/16-18 ………………………….8 9 …………. 134431 …………….Bolt, HCS, 5/16-18 X 1.5″, GR5, ZP ……………8 6 10 ……….. 160031 …………….Clip, Pin Hitch, 1/2″-9/16″ ………………………..3

7 Figure 4
1

2

Knob Set (Figure 5):

Item # Part #

Description

Qty

1 …………. 388611 ………… Knob, 3 Prong, 5/16-18 Stud ……………………. 6

2 …………. 350301 ………… Knob, 5/16-18 W/Lock, 1.16 DIA………………. 4

Figure 5

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DR® LEAF & LAWN VACUUM

Wheels Hardware Set (Figure 6):

1

Item # Part #

Description

Qty

1 …………. A0001216052 ….. Washer, 1.00″ID X 1.58″OD X .134″ Thick ……. 4 2 …………. 123341 …………… Bolt, HCS, 3/8-16 X 1.75″, GR5, ZP ……………… 4 3 …………. 333331 …………… Nut, Nylon Lock, Flange, 3/8-16 ………………….. 4 4 …………. 126851 …………… Pin, Cotter, 3/16″ X 1.5″ ……………………………… 2

• This hardware will not be used (with or on) your PRO MAX450 machine.

Power Unit Hardware Set (Figure 7):

Item # Part #

Description

Qty

1 …………. 265561 …………Bolt, HCS, 1/2-13 X 2.75″, GR5, ZP…………… 2

2 …………. 350231 …………Bolt, Hex, Flange, 5/16-18 X .75″………………. 4

3 …………. 112431 ………… Washer, Lock, 5/16″, Split, ZP ………………….. 4

4 …………. 112411 ………… Washer, Flat, 5/16″ USS, ZP …………………….. 4

5 …………. 333351 …………Nut, Nylon Lock, Flange, 1/2-13……………….. 2

Figure 6 1

Installing the Wheels
(Use Wheels Hardware Set, see Figure 6)
Tools Needed:
· Pliers
1. Position the Rear Frame/Collector Base Assembly upside down (Figure 8). 2. Install the Axle into the Axle Actuator Mount. 3. Slide a Wheel onto each end of the Axle with the Valve Stems facing in
(Figure 9). 4. Slide a Washer onto the Axle against each Wheel. 5. Slide a second Wheel onto each end of the Axles with the Valve Stem facing
out (Figure 10). 6. Install a 1.00″ ID X 1.58″ OD X .134″ Washer against each Wheel and insert
Cotter Pins into the Axle holes. Use Pliers to bend the ends of the Cotter Pins to secure the Wheels.

5 Figure 7 Frame Assembly
Figure 8

2 3
4 2 3
4 Axle

Wheel
Air Valve Cotter Pin
Figure 10

Washer

Wheel

Air Valve

Washer
Figure 9 CONTACT US AT www.DRpower.com 15

Collector Base
Carriage Bolt and Locknut Figure 11
Bolts, Lock Washers, and Flat Washers
Impeller Housing Figure 12

Tow Hitch

Frame Assembly

Figure 13

Outlet Chute

Installing the Collector Base
Tool Needed:
· 1/2″ Wrench
1. Tip the Rear Frame/Collector Base Assembly over onto the Wheels (Figure 11).
2. Position the Collector Base onto the Frame and secure with six Carriage Bolts and Locknuts using a 1/2 Wrench from the Product Pack (Figure 4).
Assembling and Installing the Power Unit
(Use Power Unit Hardware Set, see Figure 7)
Tools Needed:
· 1/2″ Wrench · Two 3/4″ Wrenches · Floor Jack
1. Place the Outlet Chute on top of the Impeller Housing (make sure to orient as shown) and secure with four Bolts, Lock Washers, and Flat Washers using a 1/2″ Wrench (Figure 12).
2. Position the Power Unit at the front of the Rear Frame with the Tow Hitch facing forward (Figure 13).
Note: Clevis Pins and Hitch Clips needed for the next steps are provided in the Product Package. 3. Lift the Rear Frame Assembly Tube to align the rear holes and insert a 1/2″ X
3.5″ Clevis Pin through the holes (Figure 13).

We recommend having a helper to attach the Frames together. There is a chance for injury if you attempt it alone because the Power Unit is heavy.

Clevis Pin and Hitch Clip

4. Use a Floor Jack to raise the Rear Frame Assembly into the Tow Hitch Tube to align the front holes and insert a 1/2″ X 3.5″ Clevis Pin (Figure 14).
5. Secure each Clevis Pin with a Hitch Clip.
6. Place the two 1/2-13 X 2.75″ Bolts (from underneath) up through the two vertical Holes and secure with 1/2-13 Locknuts using two 3/4″ Wrenches (Figure 15).
7. Plug in the Actuator Connectors (Figure 15).

Actuator Connectors

Clevis Pin and Hitch Clip

Figure 14

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DR® LEAF & LAWN VACUUM

1/2-13 Bolts and Locknuts
Figure 15

Assembling the Collector

Fabric Enclosure

Top Flap DR Logo Velcro

Front Right Side Corner

(Use Product Package Hardware, see Figure 4 and Knob Set, see Figure 5)

Tools Needed:
· Two 1/2″ Wrenches

1. Stand at the right hand side of the machine (Figure 16).

2. Unfold the fabric Enclosure partially as shown and place it onto the Collector Collector Base base.

3. Position the Enclosure with the left side facing up and Enclosure Sleeve located under front fabric at the front right corner (See Note below).
Note: Standing at the right side of the machine as shown, the DR Logo will be upside down and the top flap of the Enclosure is towards you.
4. Position a Collector Tube with the Shorter Leg facing the front of the machine and insert the ends into the corner loop openings (Figure 17).

Figure 16
Loop Opening

Enclosure Sleeve
Loop Opening

5. Push the Tubes all the way through the other end of the loops, exposing the mounting holes at the Tube ends (Figure 18).
6. Flip the Enclosure over (side to side) so the other side is facing up.
7. Stand at the left hand side of the machine (Figure 19).
8. Position the other Collector Tube with the Shorter Leg facing the front of the machine and insert the ends into the corner loop openings.
9. Push the Tubes through the other end of the loops, exposing the mounting holes at the Tube ends (Figure 20).
10. Go to the right side of the machine where the Tube ends are located.

Figure 17
Tube End

Right Side of Machine
Shorter Leg
Collector Tube

Tube Ends
Both Tubes Installed Figure 20

Figure 18

Loop Opening

Loop Opening

Left Side of Machine

Shorter Leg

Collector Tube Figure 19
CONTACT US AT www.DRpower.com 17

Front Tube Bracket
Figure 21

Bolts and Locknuts
Tube End

11. Start at the front corner of the Enclosure. Position a Front Tube Bracket on the bottom Tube (Figure 21). Secure the Bracket with two 5/16-18 Bolts and Locknuts (found in product pack, Figure 4) using two 1/2″ Wrenches but do not fully tighten. Make sure the fabric doesn’t get pinched under the Bracket.
12. Position the other Front Tube Bracket on the top Tube and secure with two 5/16-18 Bolts and Locknuts (found in product pack, Figure 4) using two 1/2″ Wrenches but do not fully tighten (Figure 22). Make sure the fabric doesn’t get pinched under the Bracket.
13. At the rear corner of the Enclosure, position a Rear Tube Bracket on the bottom Tube and secure with two Bolts and Locknuts using two 1/2″ Wrenches (Figure 23). Do not fully tighten until entire frame is secured onto bed platform. Ensure fabric doesn’t get pinched under the Bracket.
14. Position the other Rear Tube Bracket on the top Tube and secure with two Bolts and Locknuts using two 1/2″ Wrenches (Figure 24). Do not fully tighten until entire frame is secured onto bed platform. Ensure fabric doesn’t get pinched under the Bracket.
15. Stand up the Enclosure so the Brackets are resting on the Bed. Insert the two ends of the right side Collector Tube into the holes at the corners of the Collector Base (Figure 25).

Front Tube Bracket Figure 22
Bolts and Locknuts
Rear Tube Bracket Figure 23

Bolts and Locknuts
Tube End

Collector Tubes
Right Side Corners

Bolts and Locknuts

Figure 25

Tube Fully in Corner Hole

Figure 24

Rear Tube Bracket

18

DR® LEAF & LAWN VACUUM

16. Insert the two ends of the left side Collector Tube into the holes at the corners of the Collector Base (Figure 26).
17. Secure the rear Tube Brackets to the Collector Base with one Hand Knob for each Bracket (Figure 27). Do not fully tighten.
18. Secure the front Tube Brackets to the Collector Base with two Hand Knobs for each Bracket (Figure 28). Do not fully tighten.
19. Install the top front Tube Frame to the side Tube Frames and secure with two C-Head Bolts and Threaded Hand Knobs (Figure 29).
20. Slide the top rear Tube Frame through the Enclosure Loop and secure to the Side Tube Frames with two C-Head Bolts and Threaded Hand Knobs (Figure 30).
Note: The Top Rear Tube Frame is crimped on both ends. The ends that are crimped create a flat that is offset from the round tube. Install with the offset facing out towards the back so the Top Rear Tube Frame and the tube at the rear of the Collector Tube are aligned and relatively flush with each other.

Left Side Tubes Figure 26
Rear Tube Bracket

Hand Knob with Threads

C-Head Bolts
Bracket

Figure 29
Top Rear Loop

Rear Door Flap

Top Rear Tube Frame

Figure 30

Top Front Tube Frame

Hand Knob with Stud Figure 27
Front Tube Bracket

Collector Base

Tube Offset Facing out
C-Head Bolt

Hand Knob with Threads

Collector Base
Figure 28

Hand Knob with Stud

CONTACT US AT www.DRpower.com 19

Front Corner Flap

Figure 31

Side Flaps

21. Open up the front corner flaps to relieve tension on the Enclosure for the following steps (Figure 31).
22. SIDE FLAPS: Open the inner and outer Side Flaps by pulling at the Velcro closures to separate them (Figure 32).
23. Fold the Inner Flap over the Side Tube and hold it in position (Figure 33).
24. Fold the Outer Flap up and secure it to the Velcro on the Inner Flap. Repeat for the other side (Figure 34).
25. FRONT FLAPS: Open the Front Flaps by pulling at the Velcro closures to separate them (Figure 35).
26. Fold the Outer Flap over the Front Tube and hold it in position (Figure 36).
27. Fold the Inner Flap over onto the Outer Flap to secure the first Velcro Strip (Figure 37).

Figure 32 Inner Flap

Front Corner Flap

Velcro

Outer Flap

Outer Flap

Figure 35 Velcro

Inner Flap

Figure 33 Velcro

Outer Flap

Figure 34

20

DR® LEAF & LAWN VACUUM

Figure 36

Outer Flap

Velcro

Figure 37

Velcro
Figure 38
Front Corner Flap Figure 39

Outer Flap

28. Continue folding the edge of the Inner Flap to secure the Velcro at the front of the Enclosure (Figure 38).
29. Fold the Front Corner Flaps in and attach the Velcro to tighten the enclosure (Figure 39).
Notice: Ensure both front corner Flaps in the previous step are pulled in as tight as possible so the side walls do not have any slack. Adjust as needed. This will ensure debris will exit the Collector efficiently. 30. Install the Enclosure Sleeve onto the Outlet Chute and over the rib to secure
it (Figure 40).
31. Tighten all Enclosure hardware installed in steps 11 thru 18.
32. Open the four Buckles securing the Left and Right Side Door Flaps (Figure 41).
33. Swing the doors open and secure the each Side Door Flap to the sides of the Enclosure using the top Buckle (Figure 42).
34. Disconnect the one middle Buckle and pull the Lower Door Flap down to open up the back (Figure 43).

Buckle

Rear Side Flaps

Enclosure Sleeve
Outlet Chute

Figure 40

Left Side
Figure 41

Right Side
Buckles

Figure 42
Buckle Lower Door Flap

Upper Door Flap

Figure 43

CONTACT US AT www.DRpower.com 21

35. Insert the end of a 40 Batten into the opening in the side of the top flap corner in each side doors (Figure 44).
36. Rotate the Batten up and push it down into the large pocket that runs the length of the edge until it stops at the other end (Figure 45). Ensure the upper end is fully inside the pocket. Do this on both side doors.
37. Insert a 47 Batten end into the inside Pocket (inside canvas) and push it fully into the Pocket (Figure 46). Close the Button Snap to secure the Batten.
38. Repeat the last step for the other Batten Pocket on this side and for the two Pockets on the opposite side of the Enclosure.
39. Install the Metal Insert into the Insert Pocket of the rear Top Door Flap (Figure 47).
40. Secure the top Door Flap to the bottom Door Flap with the Single Buckle (Figure 48).
41. Secure the Magnets of the bottom Door Flap with the Magnets of the Upper Door Flap.
42. Secure the side Doors together with the four Buckles (Figure 49).

Batten Access Opening
Batten Pocket Figure 44

Batten Batten

Buckle
Magnet (5 Places)
Figure 48

Left Side
Figure 49

Right Side
Buckles

22

DR® LEAF & LAWN VACUUM

Figure 45

Batten

Inside Batten Pockets Figure 46
Metal Insert
Figure 47

Button Snap Rear Top Flap
Insert Pocket

Bridge Hose Clamps Figure 50
Knife Cut Line (clear plastic)

Wire Cutter Cut Point (black Rib)
Figure 51

Rivet

Bridge Clamp

Installing the Inlet Hose

Tools Needed:
· Wire Cutters · Black Marker · Utility Knife · Flat Head Screwdriver or 7mm Wrench

Coupling

1. Observe the location of the two Bridge Hose Clamps near the Coupling end of the Hose Assembly (Figure 50).
2. Cut the black Spiral Rib of the Hose between the two clamps using Wire Cutters (Figure 51). Do not cut the clear area of the Hose yet.
3. Mark the path where you will cut the clear Hose using the black Marker to ensure that the cut will meet at the opposite side.
4. Cut the clear area Hose where you marked using the Utility Knife to separate the short Hose/Coupling section from the longer Hose/Cuff section.
5. Flip the Hose/Coupling section around so the Coupling is facing the longer section of Hose (Figure 52). Loosen the Hose Bridge Clamp at the end of the longer Hose using a Flat Head Screwdriver or 7mm Wrench. Slide the Coupling into the Hose until the Clamp is just past the Rivet.
6. Tighten the Bridge Hose Clamp onto the coupling using a Flat Head Screwdrive or 7mm Wrench.
7. Using a Flat Head Screwdriver or 7mm Wrench, loosen the Hose Bridge Clamp on the end of the Hose. Slide the Hose onto the Housing neck and tighten the Hose Bridge Clamp (Figure 53).

Retaining Bump

Clamp Area

Hose Bridge Clamp

Inlet Hose

Figure 52

Coupling

Bridge Over Hose Rib

Figure53

CONTACT US AT www.DRpower.com 23

8. Slide the Hose Support into the holes of the Hose Support Bracket (Figure 54).
9. Support the Hose with the Rubber Strap by hooking one end into the Support Loop, going under the Coupling and securing the other end onto the Support Loop (Figure 55).

Hose Support
Hose Support Bracket

Hose Support Coupling

Figure 54

Figure 55

Rubber Strap

24

DR® LEAF & LAWN VACUUM

Hitch Plate
Optional Hitch Plate Configurations Figure 56

Setting up your Lawn Mower Hitch Plate Kit Installation (optional)
The DR PRO MAX450TM LEAF and LAWN VACUUM requires a Pin Hitch hole on your Lawn Mower. DR Power Equipment offers several different Hitch Plate Kits if one is not provided on your Mower (Figure 56). Contact us at www.DRpower.com or call one of our representatives at 1-800-DR-OWNER (3769637) and they will be happy to assist you.
Deck Adapter Installation

Figure 57

Deck Adapter

Rubber Washer

The DR PRO MAX450TM LEAF and LAWN VACUUM requires a Deck Adapter on your Lawn Mower to route material to its 8″ diameter hose.
DR Power Equipment “Standard” or “Angled” Deck Adapters (for right hand discharge mowers) are available for you to fit to your machine if the Mower manufacturer’s Deck Adapter is not available.
A DR Power Equipment Hose Adapter Kit is available to attach to your non DR Power Equipment Deck Adapter to our 8″ diameter Hose if needed.
Contact us at www.DRpower.com or call one of our representatives at 1-800-DROWNER (376-9637) to order a Universal Deck Adapter Kit or Hose Adapter Kit.
1. Install the Deck Adapter onto your Lawn Mower (Figure 57).
2. If you do not have a DR Deck Adapter and the 8″ Hose will not fit your Adapter, order a Kit from us using the contact info above. Install the Hose Adapter Kit onto the end of your Deck Adapter as described in the Kit instructions.
Connecting the DR PRO MAX450TM LEAF and LAWN VACUUM to your Mower

Hitch Pin

Always raise the Jack (if equipped) prior to towing this equipment. An extended Jack can damage or deform the Jack or Frame if the Jack hits the ground or an obstacle.

Tow Hitch Figure 58

Hitch Clip

1. Position the back Hitch Plate of your Mower near the Hitch of the PRO MAX450TM LEAF and LAWN VACUUM on level ground (Figure 58).
2. Operate the Jack to move the Frame up or down until the Tow Hitch is aligned with the Mower Hitch Plate.
3. Move the Leaf System into position on the Hitch Plate and install the Hitch Pin with Rubber Washer and Hitch Clip to secure the Tow Hitch to the Mower.
4. Raise the Jack Wheel and install the Jack Safety Pin.

CONTACT US AT www.DRpower.com 25

Connecting the Inlet Hose to the Deck Adapter
Tools Needed:
· Wire Cutters · Knife · Flat Head Screwdriver or 7mm Wrench

Deck Adapter

Thumb Screw Clamp

1. Slide the Hose Cuff over the Deck Adapter (Figure 56).

Hose Cuff

Tip: Position the Thumb Screw Clamp toward the Mower so it will not make contact with objects when mowing.

2. Tighten the Thumb (screw ) Clamp tightly to secure the Hose to the Hose Cuff.
3. Turn the Tractor as far as it will go to the left ensuring that the Tractor is not touching any portion of the Leaf Vacuum (Figure 57).

Figure 56

Inlet Hose
Mower Turned Fully to the Left

· If the Hose does not appear overly stretched and is not touching the ground, continue to “Adding Engine Oil and Gasoline” on the next page.

· If the Hose is overly stretched, you may need a hose extension. Contact us at www.DRpower.com for a Extra Hose Kit.
· If the hose is sagging to the ground, shorten it as follows.

Inlet Hose

Shorten the Hose: Make sure you do not shorten the Hose too much while following these procedures. Follow the steps closely to ensure parts are not damaged.

Figure 57

Support and Strap

Note: The Tractor must be turned fully to the left (Figure 57).

a. Remove the Hose Cuff from the Deck Adapter, position it next to the Deck Adapter flange and pull carefully until the Hose is no longer touching the ground (Figure 58).

b. Make a mark where the Hose aligns with the end of the flange.

c. Loosen the Bridge Hose Clamp that secures the Hose to the Hose Cuff
with Flat Screwdriver or a 7mm Wrench and pull the Cuff from the Hose. Cut Hose
d. Trace the area to cut around the Hose first to ensure your path meets at Here the opposite side (Figure 59).

e. Cut the black Rib with Wire Cutters and then cut the clear Hose with the Deck Adapter

Utility Knife.

Flange

f. Reinstall the Cuff onto the Hose and tighten the Hose Clamp. Install

Figure 58

the Cuff to the Deck Adapter (Figure 56).

Knife Cut Line

(clear plastic)

Bridge Clamp

Hose Cuff

26

DR® LEAF & LAWN VACUUM

Wire Cutter Cut Point (black Rib)
Figure 59

Wire Cutters

Adding the Engine Oil and Gasoline
Tools and Supplies Needed:
· Flexible Oil Fill Funnel (provided) · Gas and Oil as recommended below
Tip: To avoid confusion, we recommend leaving the caps on the Fuel and Engine oil Fills and only removing one cap each time when you are ready to pour gasoline or oil into the correct Fill.
Adding Oil
Note: Use only the recommended high detergent oil. Other types of oil could cause problems operating your machine. Please refer to your Engine Owner’s Manual for detailed oil information.

· You must add oil before starting the engine. This machine is shipped without oil. Traces of oil may be in the reservoir from
factory testing, but you must add oil before starting the engine. Fill the reservoir slowly checking the dipstick frequently to avoid overfilling.
· The engine needs to be on a level surface or overfilling could occur which could damage the engine during use. · To check the oil level, insert the dipstick all the way in, but do not screw it down.

Funnel
Oil Figure 60

1. Level the DR PRO MAX450TM LEAF and LAWN VACUUM frame by adjusting the Jack height (if equipped) or by propping up the front frame.
2. Lift the collector and bed to gain access to the engine oil dipstick by actuating the dump switch, holding the switch to the “DUMP” setting until the area is open enough to work in.
Note: A flexible oil fill funnel is provided with your Leaf and Lawn Vac.
3. Remove the dipstick and add about half the quantity of the oil recommended by the Engine Manufacturer (refer to your Engine Owner’s Manual for recommended quantities), and wait one minute for the oil to settle (Figure 60).
4. Insert the Dipstick, but do not screw it down to check the oil level. Continue adding a few ounces of oil at a time, rechecking the Dipstick until the oil reaches the fill mark. Be careful not to overfill.

Adding Gasoline
1. Fill the gas tank (Figure 61) to within 1-1/2 inches below top of fill neck (to allow for fuel expansion) with fresh, unleaded gas. See your Engine Owner’s Manual for more information.

Gas Fill

Figure 61

CONTACT US AT www.DRpower.com 27

Tire Pressure Check
Tools Needed:
· Tire Pressure Gauge · Air Compressor

Do not over inflate the tires. Inflate to the manufacturers recommended pressure found on the tires.

1. Remove the Valve Stem Protective Cap (Figure 62) and check the tire pressure with a Tire Pressure Gauge.

Valve Stem with Cap
Figure 62

2. Check what the manufacturers recommended pressure is that is stamped on the side of the Tire.

3. If the pressure is too low, add air through the Valve Stem with an air hose.

4. Replace the Valve Stem Protective Cap when finished.

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DR® LEAF & LAWN VACUUM

Chapter 3: Operating the DR PRO MAX450TM LEAF AND LAWN VACUUM

It may be helpful to better familiarize yourself with the features of your DR PRO MAX450TM LEAF and LAWN VACUUM by reviewing Figure 1 in Chapter 2 before beginning the steps outlined in this chapter.

Throttle Lever

Before Starting the Engine

For best performance we recommended that you operate your Leaf and Lawn Vacuum in temperatures 40°F and above.

Choke Lever

Fuel Shutoff

Figure 63

· Inspect the area where you will be working. The site must be free of

potentially hazardous obstacles such as stones, metal, or glass. Also,

Recoil

Engine Switch

make sure there won’t be people or animals in the area around the DR Leaf and Lawn Vacuum.

Starter Grip

· Always refer to the Engine “Operator’s Manual” that came with your

machine for more detailed Engine operation procedures.

1. Connect the DR PRO MAX450TM LEAF and LAWN VACUUM to your Lawn Tractor (see previous chapter), remove the Safety Hitch Pin from the Jack (if equipped), raise the Jack up and out of the way and replace the Safety Hitch Pin.
2. Check the Engine oil level every time you use the machine (refer to your Engine Operator’s Manual).
3. Check the Fuel level and make sure the Fuel Shut-Off Valve is in the OPEN position (refer to your Engine Operator’s Manual).

Starting and Stopping the Engine
1. When starting a cold Engine; push the Choke Control lever to the left (CHOKE) position and the Throttle Control lever to the far left (rabbit) position (Figure 63). If re-starting a warm Engine, leave the Choke in the (RUN) position.
2. Turn the Engine Switch to the “ON” position.
3. Manual Start – Grasp the Recoil Starter Handle and slowly pull until you feel resistance, then pull the cord with a smooth accelerating motion to start the engine. One or two pulls usually starts the DR LEAF and LAWN VACUUM.
Electric Start – Turn the Key to START until the Engine starts and then release. The Key will snap back when released and the Engine will continue to run.
4. After the Engine starts when the Choke is on, the Engine will soon begin to run rough. Adjust the Choke Lever until the engine runs smoother. Continue this process until the engine runs well with the Choke fully in the run position. When vacuuming you must operate the Engine with the Throttle in the Fast (Rabbit) position.
5. To stop the Engine, move the Throttle to the Slow (Turtle) position allowing the Engine to idle, shut off the gas, and then turn the Engine Switch to “OFF” position.

CONTACT US AT www.DRpower.com 29

Operating Safety
· Never put your hands inside the vacuum hose while the engine is running. Always stop the engine and disconnect the spark
plug wire before clearing the vacuum hose.
· Do not refuel the engine while it is hot or running.

Use common sense when using the machine. Learn to recognize the change in sounds when overloaded. Stop the engine immediately if the machine becomes jammed to prevent damage to the machine.

Towing the DR PRO MAX450TM LEAF and LAWN VACUUM
1. Make sure you firmly attach the DR PRO MAX450TM LEAF and LAWN VACUUM Hitch to your Lawn Tractor using the Hitch Pin and Hitch Clip (Figure 64).
2. If equipped with a Jack, make sure the wheel is in the fully raised position and the Jack Safety Pin is installed to lock it in place (Figure 65).
3. Make sure the Collector Base is on the Frame, the Enclosure Sleeve is over the Outlet Chute (Figure 66), and the Inlet Hose Cuff is securely attached to the Deck Adapter on your Tractor (Figure 67).

Rubber Washer

Tow Hitch

Hitch Clip

Hitch Pin

· Raise the Jack caster wheel as far as it will go and install the locking pin
prior to towing this equipment. An extended Jack caster wheel can be damaged or deformed if it hits the ground or an object.
· The DR Leaf and Lawn Vacuum is not equipped for highway use.

Figure 64

Deck Adapter
Figure 67

Thumb Screw Clamp
Hose Cuff
Inlet Hose

30

DR® LEAF & LAWN VACUUM

Jack Raised Figure 65 Enclosure Sleeve Outlet Chute
Figure 66

Towing Safety

· Watch out for low branches, overhangs, and guy wires that may catch on top of the collector. · Never allow anyone to ride in or on the DR Leaf and Lawn Vacuum. · Obey local, state, and federal regulations when you tow the DR Leaf and Lawn vacuum across public roads and highways. · Use caution when backing up your lawn tractor or trying to make tight turns going forward with the DR Leaf and Lawn
Vacuum attached. Trying to turn too sharply can cause damage to the hitch and/or the lawn tractor if you hit an obstacle. Go slowly in areas where tight turns are necessary. Straighten out the system before attempting to back up.
Slopes and Uneven Terrain

Figure 68

15º Max.

· Do not use the DR Leaf and Lawn Vacuum on slopes greater than 15
degrees (Figure 68). Doing so could result in serious injury to yourself or damage to your machine.
· When operating the DR Leaf and Lawn Vacuum over uneven terrain and
slopes, use extreme caution to not tip over the machine. Move slowly, especially with a full load, if the ground has ruts, bumps, and other depressions.
· On a slope, a heavy load will tend to shift. When using your DR Leaf and
Lawn Vacuum, keep in mind that loads tend to shift to the downhill side of the collector enclosure. The higher and heavier the load, the greater the chance you may tip over the machine.
· Travel up and down slopes and avoid going across slopes. This is the
same recommendation for mowing with your lawn tractor alone.

LEAF and LAWN VACUUM Tips
Note: Make sure the Engine is at full throttle when mowing and vacuuming leaves.

Always pick up stones, metal objects, glass, and sticks before vacuuming.
Be careful in corners. Practice in first gear to understand the effects of the machine on your ability to turn sharply. Drive your DR PRO MAX450TM LEAF and LAWN VACUUM into the corner of your property and back out straight to mow as close to the corner as possible. Do not go through ditches.
· The Lawn Deck of your mower may tend to scatter some leaves in front and to the right of the Lawn Deck. Keeping the
discharge side toward the remaining leaves will simplify cleanup by avoiding blowing leaves back onto the areas that you already finished. When you need to vacuum with the discharge side toward the completed area of the lawn, overlap the discharge side of the Lawn Deck at least a foot over the already completed section of the lawn.
· To prevent clogging the Deck Adapter, mow grass that is dry and not more 2″ at a time. To keep your grass healthy, we
recommend cutting less than 1/3 the grass height.
· Run your Lawn Deck with your Tractor at full throttle all the time to maximize the lift from your Lawn Deck and assist
your DR PRO MAX450TM LEAF and LAWN VACUUM system.
· Avoid dragging the Hose over curbs, stonewalls, or piles of cut branches. The Hose is tough, but can puncture on
sharp objects. This could also crack the Mower Deck Adapter.
· Cut wet grass can be very heavy. Fill the Collector only 3/4 full if the material is very wet. This will make the Leaf
System easier to pull and to dump.

CONTACT US AT www.DRpower.com 31

Dumping

Enclosure Sleeve
Outlet Chute

· Always shut off the tractor and engine vacuum and use caution when
dumping the collector load.
· Never back up with the Collector in the dump position.

1. Shut down the Mower and Vacuum Engines and set the Mower Parking Brake when you are at the Dump area.

Figure 69

2. Remove the Enclosure Sleeve from the Outlet Chute (Figure 69).

3. Separate the left and right side Door Flaps by disconnecting the four Buckles (Figure 70).

4. Attach the top Buckles of the side Door Flaps to the Buckles at both sides of the Enclosure (Figure 71).

5. Separate the top and bottom Door Flaps by disconnecting the Buckle and then pulling the bottom Door Flap down to release the Magnets (Figure 72). Fold the bottom Door Flap under the Bed to attach the Magnets underneath. The top Door Flap can be left hanging down.

6. Push and hold the Dump Switch towards “DUMP” to tip the Collector back (Figure 73) until it reaches full travel or the bed hits the ground.

Figure 70

7. Drive the Mower forward with the collector open to move the Leaf System away from the pile of debris and allow all debris to slide from the Bed.

8. Shake the Collector if necessary to loosen any debris that remains in the bottom.

Right Side Left Side
Buckle
Rear Side Flaps

Buckles

Never drive in reverse with the Collector in the dump position.
9. Push and hold the Dump Switch on “FLAT” to tip the Collector back to its flat bed position.
10. Close the Top and Bottom Door Flaps with the magnetic seal and buckle. 11. Undo the Buckles at the sides, close the Left and Right Doors and secure with
all four Buckles.
Figure 71

Figure 73

32

DR® LEAF & LAWN VACUUM

Controls

Buckle

Magnet (5 Places)
Figure 72

12. Pull the Enclosure Sleeve around the Outlet Chute (Figure 69).
Empty the Collector after each use. Do not store the Leaf System with debris in the Collector.

Enclosure Sleeve
Outlet Chute

Figure 69

CONTACT US AT www.DRpower.com 33

Converting to Flatbed Trailer Mode

Hose Support

Before performing this procedure, you must first shut off the mower and leaf and lawn vacuum engines, wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.

Coupling

Tools Needed:
· Flat Head Screwdriver or 7mm Wrench · Two 3/4″ Wrenches

1. Remove the Rubber Strap from the Hose Support (Figure 74). 2. Remove the Hose Support from the Bracket.

Figure 74

3. Disconnect the Hose from the Impeller Housing using a Flat Head Screwdriver or 7mm Wrench (Figure 75).
4. Turn the Thumb Screw Clamp to disconnect the Hose from the Deck Adapter (Figure 76).
5. Pull the Enclosure Sleeve from the Outlet Chute (Figure 77).
6. Remove the six Knob Bolts from under the Collector Base corners (Figure 78).
7. Loosen the Knobs at the top corners (you do not need to remove them).
8. With help from another person, lift the Enclosure from the Flatbed and set it aside.

Figure 75

Rubber Strap

Hose Clamp
Impeller Housing Hose Adapter

Inlet Hose

Deck Adapter

Thumb Screw Clamp

Front Tube Bracket

Figure 76 Enclosure Sleeve
Outlet Chute

Hose Cuff
Inlet Hose

Collector Base

Hand Knob with Stud

Figure 78

34

DR® LEAF & LAWN VACUUM

Figure 77

Rubber Washer

Tow Hitch Figure 79

Hitch Clip

Hitch Pin

9. Disconnect the Tow Hitch from the Tow Vehicle and keep the Hitch Pin, Rubber Washer and Hitch Clip for securing the Flatbed Trailer in the next section (Figure 79).

10. Remove the two sets of Bolts and Locknuts from the Frame using two 3/4″ Wrenches (Figure 80).

11. Disconnect the Actuator Connectors

12. Block the Wheels and have a helper support the Engine to take pressure off the Pins when you perform the next step.

13. Remove the front (closest to the Hitch) Hitch Clip and Clevis Pin from the Power Unit Frame.

14. Remove the rear Hitch Clip and Clevis Pin from the Power Unit Frame.

Actuator 15. Pull the Power Unit away from the Flatbed Trailer and store Power Unit,

Connectors

Hose, Hose Support and Hardware.

1/2-13 Bolts and Locknuts Figure 80
Hitch Clip

Rubber Washer
Tow Bar Hitch Pin

· Never allow anyone to ride on the Flatbed. · Do not tow on slopes greater than 15 degrees. · Travel up and down slopes and avoid going across slopes. This is the
same recommendation for using your lawn tractor alone.
Using the Flatbed Trailer
1. Hitch the Tow Bar to your Mower using the Hitch Pin with Rubber Washer and secure using the Hitch Clip (Figure 81).
Tips:
· Be careful in corners. Practice in first gear to understand the effects of the
machine on your ability to turn sharply. Do not tow through ditches.
· Distribute material as evenly as possible on the Flatbed. · Never tow more than 1100 lbs of material at one time. · Take extra care whenever you are towing long material that hangs over the
Flatbed.
· Use bungee cords or straps to hold awkward material down when necessary. · Don’t throw small heavy items (like a bulky rock) onto the Flatbed. Place
them on and then strap them down.

Figure 81

CONTACT US AT www.DRpower.com 35

Collapsing the Collector for Compact Storage

The Collector can be stored fully assembled but can also be collapsed for more compact storage.

1. Unlatch the Buckles that secure the left and right side Doors (Figure 82).

2. Unlatch the Buckle that secures the top and bottom Doors (Figure 83).

3. Locate the metal insert in the top door flap and remove it from its sleeve (Figure 84).
4. Unhook the Velcro Flaps that secure the Enclosure to the Top Front Tube (Figure 85).

Figure 82

5. Remove the Hand Knobs and the C-Head Bolts that secure the Top Front Tube Frame and remove the Tube Frame.

6. Remove the Hand Knobs and the C-Head Bolts that secure the Top Rear Tube Frame and remove the Tube Frame from the Enclosure Loop.

7. Tuck in the Enclosure ends as you bring the two Collector Tubes together for Buckle storage (Figure 86).

Lower Door Flap

Right Side Left Side
Upper Door Flap

Buckles

Bolts and Locknuts

Figure 86

Rear Tube Bracket

36

DR® LEAF & LAWN VACUUM

Figure 83
Metal Insert
Figure 84

Rear Top Flap
Insert Pocket

Outer Flap

Figure 85

Chapter 4: Maintaining the DR PRO MAX450TM LEAF and LAWN VACUUM
Regular maintenance ensures the best performance and long life of your machine. Please refer to this manual and the engine manufacturer’s owner’s manual for maintenance procedures. Service intervals listed in the checklist below supersede those listed in the engine manufacturer’s owner’s manual.

Before performing any maintenance, repairs or inspection, you must first shut off the mower and leaf and lawn vacuum engines, wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.

Regular Maintenance Checklist

PROCEDURE
Check Engine Oil Level
Check General Equipment Condition, e.g. tight nuts, bolts, welds, etc.
Check Tire Pressure Check Hose for wear, holes, or abraded areas Clean Engine Exterior & Cooling Fins Clean Engine Air Filters, replace as needed* Empty the Collector Change Engine Oil Check Exterior of Impeller Housing for Wear Lubricate Wheel Bearings Replace Spark Plug Replace Engine Air Filters

BEFORE EACH USE

AFTER EACH USE

1st time 5 hours

EVERY 25 HOURS

EVERY 100 HOURS

*Replace the filter if excess oil is found on the foam element or any oil is found in the paper element.

Lubrication
Your DR PRO MAX450TM LEAF and LAWN VACUUM was lubricated at the Factory. The operator needs to provide Engine lubrication and lubricate the Wheels periodically.

Before performing any maintenance, repairs or inspection, you must first shut off the mower and leaf and lawn vacuum engines, wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.

Tools and Supplies Needed:
· Grease gun with Multipurpose Automotive Grease · Clean Rags

Figure 87

Grease Fitting

LUBRICATE WHEEL BEARINGS:
1. Clean the Grease Fitting with a clean Rag (Figure 87). 2. Lubricate each Wheel with Multipurpose Automotive Grease using a grease
gun on the Grease Fitting.

CONTACT US AT www.DRpower.com 37

REMOVING AND REPLACING THE ENGINE OIL
Refer to page 28 as well as the Engine Operator Manual for Engine Procedures for removing and replacing the oil.
Note: Be sure to use environmentally safe disposal procedures in disposing of the used oil.
Replacing the Wheels

Before performing any maintenance, repairs or inspection, you must first shut off the mower and leaf and lawn vacuum engines, wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.

Tools Needed:
· Locking Pliers or Needle Nose Pliers. · Jack and Stand

1. Jack up the Frame and support it with Blocks or a Jack Stand so the Wheel is off the ground.

2. Remove the Cotter Pin with Locking Pliers or Needle Nose Pliers (Figure 88).

3. Remove the Large Washer and Wheel.

4. Install the new Wheel.
5. Install the Large Washer and secure with the Cotter Pin (bend the ends of the Cotter Pin to lock it onto the Axle).

Figure 88

Washer Cotter Pin

Impeller Maintenance
An Impeller Tool is provided in case you ever need to remove the Impeller for service. Simply remove the Bolt and Washer holding the Impeller onto the Engine Shaft and thread the Impeller Tool into the Impeller until it releases from the Engine (Figure 89).

Impeller
Impeller Tool

Figure 89

38

DR® LEAF & LAWN VACUUM

Battery Care
Proper care can extend the life of a Battery. Follow these recommendations to ensure your Battery’s best performance and long life:
· Do not allow the Battery charge to get too low. If the machine is not used, charge the Battery every 4 ­ 6 weeks. Operate the
engine for at least 45 minutes to maintain proper Battery charge.
· Store an unused Battery in a dry area that does not freeze. · Do not charge an already charged Battery. In theory, you cannot overcharge our Battery with a trickle charger; however, when a
Battery is fully charged and the charger is still on, it generates heat that could be harmful to the Battery. A fully charged Battery will read 12V-13.2V with a voltmeter.
· Do not continue to crank your Engine when the Battery charge is low.
Charging the Battery
Before performing any maintenance, repairs or inspection, you must first shut off the mower and leaf and lawn vacuum engines, wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.
When you are finished charging the battery, disconnect the charger from the outlet first, then disconnect the battery charger wires from the battery. If you leave the battery charger wires connected to the battery, the battery will discharge itself back into the charger.
Operate the Vacuum Engine for at least 45 minutes to maintain proper Battery charge. If the Battery loses its charge, you will need to use a trickle charger (like the DR Battery Charger) to recharge it. The Charger should have an output of 12 volts at no more than 2 amps.
· At 1 amp the Battery may need to be charged for as long as 48 hours. · At 2 amps, the Battery may need to be charged for as long as 24 hours.
NOTE: Using the Recoil Starter and then running the Engine will not recharge a dead or significantly discharged Battery. To connect a Battery Charger to your DR LEAF and LAWN VACUUM, follow the steps listed below. 1. Attach the Black (-) alligator clipped wire from the Charger Adapter to the Negative (-) terminal of the Battery, then attach the
Red (+) alligator clipped wire to the Positive (+) Battery terminal. 2. Plug the Charger into a standard wall outlet.
· Typically, the Battery takes between 6 and 8 hours to fully charge. The Battery does not have a “memory”; so don’t
worry about overcharging the Battery or charging it too often.
· You can charge the Battery many times. The Battery lasts longer if you charge it before it is fully drained. Keep it fully
charged and at room temperature when not using your DR LEAF and LAWN VACUUM.
· If the Battery does not hold its charge for very long under normal conditions, or it simply won’t hold a charge, then
replace it. You can purchase replacement Batteries directly from us. To install your new Battery, follow the directions below.
CONTACT US AT www.DRpower.com 39

Replacing the Battery

Tools Needed:
· Two 7/16″ Wrenches · Wire Cutters

1. Disconnect the Battery Terminals (Figure 94).

2. Cut the Cable Tie that securing the Wires to the Clamp using Wire Cutters. (Be careful not to cut the Battery Cables).

3. Remove the Bolts and Locknuts that secure the Battery Clamp using two 7/16″ Wrenches.

Terminals

4. Remove the Clamp and the dead Battery.

5. Install the new Battery.
6. Install the Battery Clamp and secure with the Bolts and Locknuts using two 7/16″ Wrenches.

Clamp

7. Attach the Battery Terminals. Green Wire to negative black Terminal and Red Wire to positive red Terminal. Install new cable ties to ensure cables do not catch while in use.

Bolt and Locknut Figure 94

Cable Tie

Disposing of the Battery Responsibly (Electric-Start Models)
The Battery is a sealed lead-acid Battery. Recycle or dispose of it in an environmentally sound way.
· Do not dispose of a lead-acid Battery in a fire; the Battery may explode or leak. · Do not dispose of a lead-acid Battery in your regular, household trash. Law in most areas prohibits incinerating, disposing in a
landfill, or mixing a sealed lead-acid Battery with household trash.
Recycling a Used Battery
Please dispose of your used Batteries responsibly by recycling them. Call your local Solid Waste Management District or your local waste handler to locate the collection site nearest you. Some collection sites recycle Batteries year- round; others collect them periodically.
You can also visit the www.Earth911.org for more information. Once there, in the appropriate box, type in what it is you are recycling and also type your zip code. The site will provide a list of recycling centers located near you.
For a fee, you can recycle your Batteries with the International Metals Reclamation Company. Visit them at www.inmetco.com and click Services; or contact them at:
INMETCO PO Box 720 245 Portersville Road Ellwood City, PA 16117 724-758-2825; fax 724-758-2845
To learn more about hazardous waste recycling, visit the Web site for Battery Council International [www.batterycouncil.org] or for the Environmental Protection Agency [www.epa.gov].

40

DR® LEAF & LAWN VACUUM

Chapter 5: Troubleshooting
Most problems are easy to fix. Consult the Troubleshooting Table below for common problems and their solutions. If you continue to experience problems, contact us at www.DRpower.com or call toll-free 1-800-DR-OWNER (376-9637) for support.

Before performing any maintenance, repairs or inspection, you must first shut off the Mower and Leaf and Lawn Vacuum engines, wait five minutes for all parts to stop and cool, and disconnect the Spark Plug Wire of the Leaf and Lawn Vacuum.

Troubleshooting Table

SYMPTOM
Engine recoil will not pull out or is difficult to pull.
The Engine won’t start (Please refer to the Engine Owner’s Manual for engine- specific procedures.)
Engine smokes.

POSSIBLE CAUSE
Check the Engine oil level, the Engine may be seized. See your engine owner’s manual.
There may be an oil compression lock in the cylinder. Take out the Spark Plug; hold a rag over the Spark Plug hole and pull the Recoil Cord several times to blow out any oil in the cylinder. Wipe off the Spark Plug and reinstall it.
The Recoil may be broken or jammed. Visit us at www.DRpower.com or call 1-800 -DR-OWNER (376-9637) for assistance.
Check that the engine start switch is in the ON position.
Check that your Battery cables/terminals are connected.
Check that your Battery is charged.
Check that the Spark Plug Wire is attached. Check the oil and gas level. See your engine owner’s manual.
You should be using fresh, clean gas. If the gas is old, change it. Use a fuel stabilizer if you keep gas longer than one month.
Check the Throttle adjustment and travel. See your engine owner’s manual. The Spark Plug should be clean. If the Spark Plug is dirty or cracked, change it. If it’s oily, leave
it out, hold a rag over the Plug hole and pull the Recoil Cord several times to blow out any oil in the cylinder, then wipe off the Plug and reinstall it. If the Engine still won’t start, visit us at www.DRpower.com or call 1-800-DR- OWNER (376-9637) for assistance.
Check the oil level and adjust as needed. You may be operating the machine on too great an incline. See “Slopes and Uneven Terrain” on
page 31.
Check the Air Filter and clean or replace if needed. You may be using the wrong oil–too light for the temperature. Refer to your Engine Owner’s
Manual for detailed information.
Clean the Engine cooling fins and the carburetor housing if they are dirty.
If the Engine still smokes, visit us at www.DRpower.com or call 1-800-DR-OWNER (376-9637) for assistance.

CONTACT US AT www.DRpower.com 41

Troubleshooting Table (Continued)

Before performing any maintenance, repairs or inspection, you must first shut off the mower and leaf and lawn vacuum engines, wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.

SYMPTOM
The Engine lacks power or is not running smoothly. (Please refer to the Engine Owner’s Manual for engine-specific procedures.)
Wheels tracking left or right while being towed.

POSSIBLE CAUSE
Check the Throttle travel. See your engine owner’s manual. The Choke should be pushed all the way to the right (RUN). See your engine owner’s manual. Check to see if the Air Filter is clean. If it’s dirty, change it following the procedure in the Engine
Owner’s Manual.
The Spark Plug should be clean. If the Spark Plug is dirty or cracked, change it. If it’s oily, leave it out, hold a rag over the Plug hole and pull the Recoil Cord several times to blow out any oil in the cylinder, then wipe off the Plug and reinsert it.
You should be using fresh, clean gas. If the gas is old, change it. Use a fuel stabilizer if you keep gas longer than one month.
Check and make sure the Engine has the right amount of clean oil. If it’s dirty, change it following the procedure in your engine owner’s manual.
If your Engine still lacks power, visit us at www.DRpower.com or call 1-800 -DR-OWNER (376-
9637) for assistance.
Check the tire pressure. Refer to the Tire manufacturers recommended pressure on the side of the Tire and adjust pressure as needed.

Lawn Deck is not vacuuming well.
Leaves or grass come out of the back of the Enclosure.

Be sure the LEAF and LAWN VACUUM Engine is running at full throttle. Be sure the Lawn Deck Blades are engaged and running at full throttle. Be sure the Deck is set at the proper mowing height. Use 1st or 2nd gear on your Lawn Tractor for best results. Turn off the Lawn Tractor Engine and Vacuum Engine and check the Deck Adapter for clogs. Look for clogs along the Hose. Shake the Hose to loosen and free any clog. Turn off the Lawn Tractor Engine and LEAF and LAWN VACUUM Engine and disconnect the
LEAF and LAWN VACUUM Engine Spark Plug Wire. Check for clogs in the Outlet Chute and Inlet Hose. If your Lawn Deck still is not vacuuming properly, visit us at www.DRpower.com or call 1-800DR-OWNER (376-9637) for assistance.
Check that all Rear Door Flaps are secured with the Buckles. Verify that the Top and Bottom Door Flaps are buckled first, and the Side Door Flaps are buckled last.

Leaves or grass come out where the Outlet Chute and Enclosure meet.

Be sure the Enclosure Sleeve is fully installed around the Outlet Chute.

The linear actuator stops working.

Check to make sure the connectors are plugged in (Page 17, Figure 15) Check to make sure battery wire terminals are connected. Check to make sure your battery is not dead. Check that the 20A fuse has not blown (located in a yellow housing on the switch wire harness).

42

DR® LEAF & LAWN VACUUM

Chapter 6: Parts Lists and Schematic Diagrams Parts List ­ FRAME AND BED ASSEMBLY

NOTE: Part numbers listed are available through DR Power Equipment.

Ref# Part#

Description

Ref# Part#

Description

1 A0002423743 Frame w/Label, Rear

2 A0001501638 Actuator Mount, Axle

3 342561

Axle

4 337941

Wheel and Tire, 14 X 5.3/4.50-8, 4 Ply

5 A0001234669 Base, Collector

6 A0001234670 Rest Plate, Base, Collector

7 A0001234728 Linear Actuator, 12V, 260mm Stroke

8 A0000543342 Frame, Front, W/ Weld Nuts

9 342771

Wheel, 4

10 342691

Jack, Trailer

11 388621

Axle, Power Unit

12 333321

Nut, Nylon Lock, Flanged, 5/16-18

13 111521

Bolt, HCS, 3/8-16 X 1, GR5, ZP

14 333331

Nut, Nylon Lock, Flanged, 3/8-16

15 114681

Bolt, HCS, 1/4-20 X 1-1/4, GR5, ZP

16 110731

Nut, Nylon Lock, 1/4-20

17 234991

Washer, 0.53 ID X 1.06 OD X 0.095, ZP

18 235001

Pin, Cotter, 7/64 X 1, ZP

19 265561

Bolt, 1/2-13 X 2 3/4, GR5, TB

20 333351

Nut, Nylon Lock, Flanged, 1/2-13

21 211541

Pin, Clevis, 1/2 X 3.5 L, ZP

22 160031

Pin, Hitch Clip, 1/2-9/16

23 A0001216052 Washer, 1.00 ID X 1.58 OD X .134 Thick

24 A0001681944 Bolt, Carriage, 5/16-18 X 2-3/4, GR5, ZP

25 350331

Bolt, Carriage, 5/16-18 X 1.75, GR5, Z

26 123371

Bolt, HCS, 3/8-16 X 2-3/4, GR5, ZP

27 A0000253563 Pin, Clevis, 1/2 X 4.5 L, ZP

28 A0001681945 Bolt, HCS, 1/2-13 X 2-1/4, GR5, ZP

29 189671

Washer, Rubber, 1/2ID X 1OD

30 126851

Pin, Cotter, 3/16 X 1-1/2

31 A0001515289 Support, Pivot, Metal Bed

32 385601

Bumper, Bed

33 385941

Bolt, FHCS, 1/4-20 X .75, GR5, ZP

34 372291

Label, Do Not Over Fill Oil

CONTACT US AT www.DRpower.com 43

Schematic ­ FRAME AND BED ASSEMBLY

44

DR® LEAF & LAWN VACUUM

Parts List ­ POWER UNIT ASSEMBLY

NOTE: Part numbers listed are available through DR Power Equipment.

Ref# Part#

Description

Ref# Part#

Description

1 A0000094783 Impeller

2 342391

Spacer, Impeller

3 354381

Engine w/Labels, DR 16.96TQ, E/S 50ST

4 134471

Battery, 9 Ah, 12V

5 242301

Strap, Battery

6 342751

Wire, Battery, Ground

7 342761

Wire, Battery, Positive

8 342441

Rod, Support Hose

9 A0001234672 Sideplate, Housing, Engine

10 A0002325639 Scroll, Housing, w/Labels

11 388591

Adapter, Hose, Impeller Housing

12 A0001469146 Bracket, Rod, Hose

13 A0001234766 Wire Harness, Actuator

14 A0002325649 Chute, Impeller Outlet, w/Label

15 386401

Bolt, HCS, 5/16-18 X 6, GR5, ZP

16 187551

Nut, Nylon Lock, 5/16-18, LP

17 110761

Nut, Nylon Lock, 5/16-18

18 123211

Bolt, HCS, 5/16-18 X 3/4, GR5, ZP

19 333321

Nut, Nylon Lock, Flanged, 5/16-18

20 119831

Bolt, HCS, 1/4-20 X 3/4, GR2, ZP

21 333331

Nut, Nylon Lock, Flanged, 3/8-16

22 A0000072109 Bolt, HCS, 5/16-24 X 2-7/8, GR8 YZP

23 350361

Washer, Flat, 0.344 X 1.25 X 0.25, ZP

24 350321

Washer, Lock, 5/16, GR8, YZP

25 123341

Bolt, HCS, 3/8-16 X 1-3/4, GR5, ZP

26 350401

Washer, Lock, 3/8, Ext Tooth, ZP

27 126831

Nut, Finish, 3/8-16

28 350231

Bolt, Hex, Flange, 5/16-18 X .75

29 293791

Tube, Clamp, 3/4, Vinyl Coated

30 137581

Label, Check Oil, 2.75 X .63

31 188871

Label, Hot Surface, R/C

32 372301

Label, Idle Before Stop

33 10000036023 Decal, Prop 65, Short Form

34 119851

Bolt, HCS, 3/8-16 X 1 1/2, GR5, ZP

35 342781

Label, Warning, Chutes and Hose

36 A0002163842 Label, PRO MAX450

37 A0002163843 Label, Dump Switch

38 388501

Label, Warning Icons

39 388491

Label, Warning, Operating

40 294871

Boot, Rubber, Red

41 A0002325644 Bracket, Switch, w/Label

42 A0002325641 Sideplate, Housing, Hose

Not Shown
370361 350371

Funnel, Oil, Flexible Bolt, Hex, Impeller Tool, 7/16-20

CONTACT US AT www.DRpower.com 45

Schematic ­ POWER UNIT ASSEMBLY

46

DR® LEAF & LAWN VACUUM

Parts List ­ COLLECTOR ASSEMBLY

NOTE: Part numbers listed are available through DR Power Equipment.

Ref# Part#

Description

Ref# Part#

Description

1 A0001234650 Tube, Collector, Side Frame

2 A0001055802 Bracket, Tube, Front

3 A0001234651 Tube, Frame, Top Front

4 A0001234667 Tube, Frame, Top Rear

5 110761

Nut, Nylon Lock, 5/16-18

6 350271

Bolt, C-Head, 5/16-18 X 1.75 ZP

7 350301

Knob, 5/16-18 W/Lock, 1.16 Dia

8 134431

Bolt, HCS, 5/16-18 X 1-1/2, GR5, ZP

9 388611

Knob, 5/16-18 X 1.45 Stud W/Lock

10 A0001721719 Enclosure, Fabric

11 A0001725342 Metal Insert, Enclosure

12 A0001234675 Batten, FRP, 0.58 X .12 X 47

13 361201

Batten, FRP, 0.58 X 0.12 X 40

14 A0000926593 Bracket, Tube, Rear

CONTACT US AT www.DRpower.com 47

Schematic ­ COLLECTOR ASSEMBLY

48

DR® LEAF & LAWN VACUUM

Parts List and Schematic ­ HOSE ASSEMBLY

Note: Part numbers listed are available through DR Power Equipment.

Ref# Part#

Description

1 337951 Hose, 8″ ID X 72″ Long, PVC (cut into two pieces ­ 56″ section and 16″ section) 2 337961 Clamp, Hose, 8″, Bridge 3 354421 Strap & Hook Set 4 351981 Coupling 5 337971 Clamp, Hose, 8″, Thumbscrew 6 342481 Cuff, Hose, 8″ 7 164141 Rivet, Pop, 3/16 X 3/16

CONTACT US AT www.DRpower.com 49

DR® LEAF and LAWN VACUUM
2-Year Limited Warranty
Terms and Conditions
The DR LEAF and LAWN VACUUM is warranted for two (2) years against defects in materials or workmanship when put to ordinary and normal consumer use; ninety (90) days for any other use. For the purposes of all the above warranties, “ordinary and normal consumer use” refers to non-commercial residential use and does not include misuse, accidents or damage due to inadequate maintenance. DR Power Equipment certifies that the DR LEAF and LAWN VACUUM is fit for ordinary purposes for which a product of this type is used. DR Power Equipment however, limits the implied warranties of merchantability and fitness in duration to a period of two (2) years in consumer use, ninety (90) days for any other use. The 2-Year Limited Warranty on the DR LEAF and LAWN VACUUM starts on the date the machine ships from our factory. The 2-Year Limited Warranty is applicable only to the original owner.
The warranty holder is responsible for the performance of the required maintenance as defined by the manufacturer’s owner’s manuals. The warranty holder is responsible for replacement of normally wearing parts such as the Spark Plug, and Air Filters. Accessories to the machine are not covered by this warranty.
During the warranty period, the warranty holder is responsible for the machine transportation charges, if required. During the warranty period, warranty parts will be shipped by standard method at no charge to the warranty holder. Expedited shipping of warranty parts is the responsibility of the warranty holder.
SOME STATES DO NOT ALLOW LIMITATIONS ON THE LENGTH OF IMPLIED WARRANTIES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. DR Power Equipment shall not be liable under any circumstances for any incidental or consequential damages or expenses of any kind, including, but not limited to, cost of equipment rentals, loss of profit, or cost of hiring services to perform tasks normally performed by the DR LEAF and LAWN VACUUM.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU ALSO HAVE OTHER RIGHTS, WHICH VARY FROM STATE TO STATE.

50

DR® LEAF and LAWN VACUUM

Daily Checklist for the DR PRO MAX450TM LEAF and LAWN VACUUM
Before performing any maintenance, repairs, or inspection, you must first shut off the mower and leaf and lawn vacuum engines, wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.
To help maintain your DR PRO MAX450TM LEAF and LAWN VACUUM for optimum performance, we recommend you follow this checklist each time you use your Vacuum. [ ] OIL: With the machine on a level surface, remove the Oil Fill Cap and check the oil level. Fill the reservoir according to
the Dipstick with the recommended motor oil. [ ] GAS: Fill the gas tank with fresh, unleaded gasoline. [ ] ENGINE: It is very important to keep the Engine clean. Remove dirt and other debris from the Engine cooling fins and
debris guard. A dirty Engine retains heat and can cause damage to internal Engine components. [ ] HARDWARE: Check all nuts and bolts to be sure that the components are secure. [ ] FRAME: Check all welds to be sure that the frame is intact and secure. [ ] HOSES: Inspect the Hose for holes, frayed, worn, kinked, or abraded areas. Replace a damaged or worn Hose. [ ] COLLECTOR: Empty the Collector after each use. Do not store the Leaf System with debris in the Collector.
End of Season and Storage
Before performing any maintenance, repairs, or inspection, you must first shut off the mower and leaf and lawn vacuum engines, wait five minutes for all parts to stop and cool, and disconnect the spark plug wire of the leaf and lawn vacuum.
Note: Please refer to the Engine Owner’s Manual for engine-specific procedures.
· Change the oil. Refer to your Engine Owner’s Manual for detailed information. · If your DR PRO MAX450TM LEAF and LAWN VACUUM will be idle for more than 30 days, we recommend using a gas
stabilizer. This will prevent sediment from gumming up the carburetor. If there is dirt or moisture in the gas or tank, remove it by draining the tank. Completely fill the tank with fresh, unleaded gas and add the appropriate amount of stabilizer or gasoline additive. Run the engine for a short time to allow the additive to circulate.
· Remove the spark plug and pour about 1 ounce of motor oil into the cylinder hole. Replace the plug and pull the recoil
starter rope until you feel strong resistance. This will coat the piston and seat the valves to prevent moisture buildup.
· Clean or replace the air filter. Refer to your Engine Owner’s Manual for detailed information. · Clean dirt and debris from the cylinder head cooling fins, Impeller housing, debris screen, and muffler area of the engine. · Clean out residual debris from the Hose and Collector. · If possible, store the DR PRO MAX450TM LEAF and LAWN VACUUM in a dry, protected area. If it is necessary to store the
machine outside, cover it with a protective material (especially the Engine). Contact us at www.DRpower.com or call 1-800DR-OWNER (376-9637) to purchase a cover for your DR PRO MAX450TM LEAF and LAWN VACUUM.
CONTACT US AT www.DRpower.com 51

800 HINESBURG ROAD, SOUTH BURLINGTON, VERMONT 05403

©2022 DR Power Equipment. All rights reserved

A0002325658_A

References

• Battery Council International Home | Battery Council International
• Customer Support | DR Power Equipment
• Homepage | DR Power Equipment
• U.S. Environmental Protection Agency | US EPA
• INMETCO - INMETCO

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