MK-20 Series Standard Gas Walk Behind Concrete Saws Owner’s Manual

MK-20 Series Standard Gas Walk Behind Concrete Saws

Product Information

MK-20 Concrete Saw Series

The MK-20 Concrete Saw Series is a powerful cutting tool designed for cutting through concrete and other hard materials. It is available in two models: MK- 2013HE GX390 and MK-2013HSP GX390. The part numbers for these models are 155714 and 156499 respectively. The saw is manufactured by MK Diamond, a reputable company in the construction equipment industry.

The MK-20 Concrete Saw Series offers reliable performance and durability, making it suitable for both professional contractors and DIY enthusiasts. It is equipped with a high-quality engine and features a robust construction to withstand tough job site conditions.

This owner’s manual provides comprehensive instructions on the safe operation, maintenance, and assembly of the MK-20 Concrete Saw. It is essential to read and understand this manual before using the equipment to ensure personal safety and maximize the lifespan of the product.

Product Usage Instructions

1. Unpacking, Transport, and Assembly

Before using the MK-20 Concrete Saw, follow these steps:

1. Unpack the contents of the package, ensuring that all parts and accessories are included.
2. Transport the saw to the desired location, taking care to handle it safely.
3. Assemble the saw according to the assembly instructions provided in the manual. Ensure all components are securely attached.

2. Set-Up

Prior to operating the MK-20 Concrete Saw, perform the following set-up tasks:

1. Ensure you are wearing proper protective clothing, including shatterproof glasses, steel-toed boots, and other recommended protective devices.
2. Inspect the saw for any damage or loose parts. Do not operate if any issues are found; contact an authorized service center.

3. Operation

When using the MK-20 Concrete Saw, adhere to the following guidelines:

1. Read and understand all safety precautions mentioned in the manual.
2. Avoid touching engine components while the saw is running or immediately after it is turned off, as they can become extremely hot.
3. Do not remove heat shields from the engine while operating.
4. Never tamper with the governor components or settings to increase the maximum speed. Operating the saw above the recommended speed can result in personal injury and damage to the engine or equipment.

4. Shutdown

After completing your cutting tasks, follow these steps to shut
down the MK-20 Concrete Saw:

1. Allow the engine to cool down before performing any maintenance or storage procedures.
2. Turn off the engine using the designated shut-off switch.

5. Cleanup and Maintenance

Proper maintenance is crucial for the longevity and performance of the MK-20 Concrete Saw. Follow these recommendations:

1. Regularly clean the saw, removing any debris or dust that may accumulate during operation.
2. Refer to the maintenance section in the manual for detailed instructions on lubrication, filter cleaning, and other maintenance tasks.

For further information on accessories, ordering, warranty, and authorized service centers, refer to the corresponding sections in the owner’s manual.

Always prioritize safety and exercise caution while operating the MK-20 Concrete Saw. Failure to follow the instructions and safety precautions may result in injury, equipment damage, or reduced equipment life.

Caution: Read all safety and operating instructions before using this equipment. This owner’s manual MUST accompany the equipment at all times.

INTRODUCTION

Congratulations on your purchase of a MK-20 Series. We are certain that you will be pleased with your purchase. MK Diamond takes pride in producing the finest construction power tools and diamond blades in the industry.
Operated correctly, your MK-20 Series should provide you with years of service. In order to help you, we have included this manual. This owners manual contains information necessary to operate and maintain your MK-20 Series safely and correctly. Please take the time to familiarize yourself with the MK-20 Series by reading and reviewing this manual.
Read and follow all safety, operating and maintenance instructions.
If you should have questions concerning your MK-20 Series, please feel free to call our friendly customer service department at: 800 421-5830
Regards,
MK Diamond

NOTE THIS INFORMATION FOR FUTURE USE:

MODEL NUMBER:|
---|---
SERIAL NUMBER:|
PURCHASE PLACE:|
PURCHASE DATE:|

WARRANTY: For your (1) one year warranty to be effective, complete the online Product Registration as soon as possible. Visit www.mkdiamond.com/registration/

SAFETY

Read and follow all safety, operating and maintenance instructions. Failure to read and follow these instructions could result in injury or death to you or others. Failure to read and follow these instructions could also result in damage and/or reduced equipment life. Safety warnings and guidelines do not by themselves eliminate danger. They are not substitutes for proper accident prevention procedures and good judgement.

SAFETY MESSAGES

A safety message alerts you to potential hazards that could hurt you or others. Each safety message is preceded by a safety alert symbol ( ) and one of three words: DANGER, WARNING, or Caution

• DANGER You WILL be KILLED or SERIOUSLY INJURED if you DO NOT follow directions.
• WARNING You CAN be KILLED or SERIOUSLY INJURED if you DO NOT follow directions.
• CAUTION You CAN be INJURED if you DO NOT follow directions. It may also be used to alert against unsafe practices.

DAMAGE PREVENTION AND INFORMATION MESSAGES

A Damage Prevention Message is to inform the user of important information and/or instructions that could lead to equipment or other property damage if not followed. Information Messages convey information that pertains to the equipment being used. Each message will be preceded by the word NOTE, as in the example below.
NOTE: Equipment and/or property damage may result if these instructions are not followed.

GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS

In order to prevent injury, the following safety precautions and symbols should be followed at all times!

ALWAYS read this Owner’s Manual before operating the machine. DO NOT operate or service this equipment before reading this entire manual. Read and understand all warnings, instructions and controls on the machine. Know how to stop the equipment quickly in case of emergency. It is the operators responsibility to use this machine under safe working conditions and conform with federal, state and local codes or regulations pertaining to safety, air, pollution, noise etc…
ALWAYS keep the Blade and Belt Guards in place. DO NOT operate this machine with any guard or safety device removed. A Guard, or any damaged part should be repaired or replaced immediately.
NEVER operate this equipment without proper protective clothing, shatterproof glasses, steel-toed boots and other protective devices required by the job. Non-slip foot wear is recommended. PERSONAL PROTECTIVE EQUIPMENT
ALWAYS wear approved respiratory, head, ear and eye protection when operating this machine.

• ACCIDENTAL STARTS!
  Before starting the engine/motor, be sure the ON/OFF switch is in the OFF position to pre-vent accidental starting. Place the ON/OFF switch in the OFF position before performing any service operation. ALWAYS place the power ON/OFF switch in the OFF position when the machine is not in use.

• ROTATING PARTS
  Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never oper-ate the motor with covers, shrouds, or guards, removed.

• HOT PARTS!
  Engine components can become extremely hot from operation. To prevent severe burns, do not touch these areas while the engine is running, or immediately after it is turned off. Never operate the engine with heat shields removed.

• OVER SPEED
  NEVER tamper with the governor components or settings to increase the maximum speed. Severe personal injury and damage to the engine or equipment can result if operated at speeds above maximum.

• ELECTRICAL SHOCK
  NEVER touch electrical wires or components while the engine is running. Exposed, frayed or worn electrical wiring and plugs can be sources of electrical shock which could cause severe injury or burns. Do not touch the plug with wet hands.

• ALWAYS avoid inhalation of and skin contact with silica dust and/or mist. Provide proper dust removal. Use dust-collection system when applicable.

• NEVER operate the machine in an explosive atmosphere or near combustible materials. Sparks from the cutting-action of this machine can ignite flammable materials, liquids, gases or dust.

• This equipment should not be operated by persons under 18 years of age.

• KEEP CHILDREN AWAY

• All visitors and children should be kept a safe distance from work area. Maintain a safe operating distance to other personnel.

• MAKE THE WORKSHOP KID PROOF

• Make the workshops kid proof by using padlocks, master switches or by removing starter keys.

• DO NOT FORCE THE TOOL
  A power tool will do a job better and safer operating at the rate for which it was designed.

• DO NOT force a tool or an attachment to do a job that it was not designed to do.

• USE PROPER APPAREL
  DO NOT wear loose clothing, gloves, neckties, rings, bracelets, or other jewelry that may be caught in moving parts. Non-slip footwear is recommended. Wear protective hair cover-ing to contain long hair.

• SECURE WORK
  Clamps or a vise should be used to hold work whenever practical. Keeping your hands free to operate a power tool is safer.

• DO NOT OVERREACH
  Keep proper footing and balance at all times by not overreaching.

• DISCONNECT TOOLS
  Power tools should always be disconnected before servicing, adjusting or when changing accessories, such as blades, bits, cutters, and the like.

• MAINTAIN TOOLS WITH CARE
  Keep tools clean and maintained for the best and safest performance. Always follow maintenance instructions and examine the machine before use. If any abnormal vibrations or noises occurs, turn off machine immediately and have the problem corrected before further use.

• REMOVE ADJUSTING KEYS AND WRENCHES
  Form a habit of checking to see that keys and adjusting wrenches are removed from
  the power tool before it is turned on.

• KEEP WORK AREA CLEAN
  Cluttered work areas and benches invite accidents. Keep area around machine clear of obstructions which could cause persons to fall.

• DO NOT USE IN DANGEROUS PLACES

• DO NOT operate equipment in dangerous or hazardous environments. DO NOT use power tools in damp or wet locations nor expose them to rain. Always keep the work area well lighted.

• USE RECOMMENDED ACCESSORIES
  Consult the owner’s manual for recommended accessories. Using improper accessories may increase the risk of personal or by-stander injury. Unauthorized equipment modifications will void all warranties. Manufacturer does not assume responsibility for any accident due to equipment modifications.

• ALWAYS ensure that the machine is on level ground before using.

• NEVER STAND ON THE TOOL
  Serious injury could occur if a power tool is tipped, or if a cutting tool is unintentionally contacted.

• TRANSPORT
  When loading or unloading the machine, use caution. Remove the blade prior to hoisting, loading and transporting the machine.

• CHECK FOR DAMAGED PARTS
  Before using a power tool, check for damaged parts. A guard or any other part that is damaged should be carefully checked to determine if it would operate properly and perform its intended function. Always check moving parts for proper alignment or binding. Check for broken parts and mountings and all other conditions that may affect the operation of the power tool. A guard, or any damaged part, should be properly repaired or replaced. Always check the machine for loose bolts before starting.

• DIRECTION OF ROTATION
  A blade or cutter should always be installed so that rotation is in the direction of the arrow imprinted on the side of the blade or cutter. It should correspond with the rotational direction of the motor. Always feed work into a blade against the direction of rotation.

• NEVER LEAVE A TOOL UNATTENDED
  TURN POWER OFF – Do not leave a tool until it comes to a complete stop. ALWAYS turn a power tool OFF when leaving the work area, or, when a cut is finished.

• NEVER disconnect any “emergency or safety devices”. These devices are intended for operator safety. Disconnection of these devices can cause severe injury, bodily harm, or even death! Disconnection of any of these devices will void all warranties. Unauthorized equipment modifications will void all warranties. Manufacturer does not assume responsibility for any accident due to equipment modifications.

• NEVER use this machine with any cutter designed for woodworking.

• NEVER operate this equipment when not feeling well due to fatigue, illness or taking medicine.

• NEVER operate this equipment under the influence of drugs or alcohol.

• On belt driven equipment, overtensioning of belts will result in premature crank and/or bearing failure.

• Whenever necessary, replace nameplate, operation and safety decals when they become difficult to read.

• ALWAYS store equipment properly when it is not being used. Equipment should be stored in a clean, dry location out of the reach of children

• DO NOT lend or rent this equipment without including the Owner’s Manual and the Engine/Motor Manufacturer’s Manual.

• Check the chemical properties of the material to be cut/grinded and follow all EPA/OSHA Regulations. (cut/ground)

SILICA DUST WARNING

Grinding/cutting/drilling of masonry, concrete, metal and other materials with silica in their composition may give off dust or mists containing crystalline silica. Silica is a basic component of sand, quartz, brick clay, granite and numerous other minerals and rocks. Repeated and/or substantial inhalation of airborne crystalline silica can cause serious or fatal respiratory diseases, including silicosis. In ad-dition, California and some other authorities have listed respirable crystalline silica as a substance known to cause cancer. When cutting such materials, always follow respiratory precautions.
Use appropriate NIOSH-approved respiratory protection where dust hazard may occur. Paper masks or surgical masks without a NIOSH approval number are not recommended because they do little to protect the worker. For more information about respirator programs, including what respirators have received NIOSH approval as safe and effective, please visit the NIOSH website at:
http://www.cdc.gov/niosh/topics/respirators
Observe OSHA regulations for respirator use (29 C.F.R.§1910.134).
Visit http://www.osha.gov for more information.

CALIFORNIA PROPOSITION 65 MESSAGE
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities con-tain chemicals known (to the State of California) to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:

• Lead, from lead-based paints
• Crystalline silica, from bricks and cement and other masonry products
• Arsenic and chromium, from chemically treated lumber

For further information, consult the following sources:
http://www.osha.gov/dsg/topics/silicacrystalline/index.html
http://www.cdc.gov/niosh/docs/96-112/
http://oehha.ca.gov/prop65/law/P65law72003.html
http://www.dir.ca.gov/Title8/sub4.html
http://www.P65warnings.ca.gov
Your risk from these exposures varies depending on how often you do this type of work. To reduce your exposure to these chemicals, work in a well-ventilated area, and work with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles. Where use of a dust extraction device is possible, it should be used. To achieve a high level of dust collec-tion, use an industrial HEPA vacuum cleaner. Observe OSHA 29 CFR part 1926.57 and 1926.103.

GAS ENGINE SAFETY

Gasoline models are shipped from the factory dry, meaning without fuel or oil. Both must be added before equipment can be used. Check the engine Manufacturer Owner’s Manual for instructions on fueling, break-in, servicing and proper engine care and use.

GAS SAFETY PRECAUTIONS

EXPLOSIVE FUEL!
Gasoline is extremely flammable, its vapors can explode if ignited; store only in approved containers, in well-ventilated, unoccupied buildings and away from sparks or flames. DO NOT fill the fuel tank while the engine is running or hot. Spilled fuel could ignite if it con-tacts hot parts or sparks from ignition. DO NOT overfill tank. DO NOT start the engine near spilled fuel. Never use gasoline as a cleaning agent.
Refer to engine manufacturer manual for specific operating procedures and safety warnings. ALWAYS check the fuel lines and fuel tanks for leaks and cracks before starting the engine. DO NOT run the machine if fuel leaks are present or the fuel lines are loose.
Accidental start hazard. Disconnect spark plug prior to servicing.

LETHAL EXHAUST GASES!
Engine exhaust gasses contain poisonous carbon monoxide (an odorless, colorless gas). Avoid inhaling exhaust fumes Breathing it can cause unconsciousness and even kill you. Always operate gasoline engine machines in a well-ventilated area. DO NOT operate in ar-eas where exhaust fumes could accumulate without wearing appropriate respiratory protec-tion. Never run the engine in a closed building or confined area.

NOTE: Prior to operation of this machine the operator must determine the existence and location of any subsurface features that may be hazardous or could damage the equipment, (i.e. electric cable, natural gas line etc.).

FUELING SAFETY

ALWAYS use caution when handling fuel. Shut off the engine and allow to cool before refueling.

ALWAYS refill fuel tank in a well-ventilated area.
ALWAYS replace the fuel tank cap after refueling.
ALWAYS close fuel value on engines when machine is not being operated.
Move the machine at least 10 feet (3 meters) from the fueling point before starting the engine, and make sure the gas cap is on the machine and the fuel can is properly tightened.

OPERATION & SAFETY DECALS

The MK-20 Series Concrete Saw is equipped with a number of safety decals. These decals are pro-vided for operator safety and maintenance information. Should any of these operation or safety de-cals become unreadable, replacements can be obtained by calling 800-262-1575.

Location of Safety Decals for models: MK-2013HE, MK-2013HSP

Decal/Label Location Description
A Gas Tank – Top Warning – Dust Control
B Console Warning – Silica Prop 65
C Shaft Cover/Belt Guard/Blade Guard Caution – Guards in Place
D Frame – Side Warning – Read Owner’s Manual
E Console QR Codes for Manuals and Safety

PRODUCT SPECIFICATION

The MK-20 Series is a versatile gas powered Concrete Saw. Operated and used according to this manual, the MK-20 Series will provide years of dependable service.

General Description
The MK-20 Series is engineered as a portable concrete saw powered by a Honda gas engine. The saw is capable of 5-5/8″ depth of cut with a 16″ blade and 6-5/8″ depth of cut with an 18″ blade.

Motor and Weight Specifications
Motor and Weight specifications for the MK-20 Series are listed below.

Blade
The MK-20 Series uses a 16″ to 18″ diameter diamond blade.
Concrete Saw Usage
The MK-20 Series is designed to cut various grades of concrete surfaces.

MK-20 Series Series Features

• One-piece box construction chassis made from 3/16″ hot-rolled steel
• Powder-coated chassis resists peeling and corrosion
• Cast-aluminum hinged blade guard
• Stainless steel water distribution system supplies water to both sides of blade
• Blade guard mounts on both left- or right-hand side of saw and cuts within 2″ of wall or curb
• Heavy-duty blade shaft supported by two 1-3/16″, self-aligning pillow blockbearings
• Depth control assembly engineered for smooth, controlled blade insertion
• Built-in tach/hour meter
• Depth feed gauge indicator
• Heavy-duty hydro static transmission with variable speed drive
• Durable 8″ x 2-1/4″ non-slip rubber wheels with maintenance-free hubs & roller bearings
• Forward travel speed: 0-80’ minute

UNPACKING

Your saw has been shipped from the factory thoroughly inspected. Only minimal assembly and service is required. Check each item, making certain all items are accounted for and in good visual condition before discarding any packing materials. If there are any missing or damaged parts call MK Diamond Customer Service at 800-421-5830.

WARNING Never start engine until all initial servicing and set up steps are completed according to this operations manual and engine manual. Read and familiarize yourself with all controls and features of the saw before beginning operations.

Remove the saw from the pallet and place it on a flat surface. Two people are required to lift saw.
CONTENTS
In the containers, you will find one (1) MK-20 Series Saw, one (1) Blade Nut Wrench, one (1) Handle-bar, two (2) Handlebar Bolts and Washers, one (1) Pointer, one (1) MK-20 Series Owner’s Manual, one (1) Engine Owners Manual.

TRANSPORT

CAUTION

1. The MK-20 Series weighs approximately two hundred and thirty-five (235 pounds), use care when transporting.
2. Two people are required to lift and transport the MK-20 Series.

ASSEMBLY

DESCRIPTION OF CONTROLS

1. The Depth Control Wheel raises the blade when rotated clockwise, and lowers the blade when rotated counterclockwise.
2. On the 2013HE the keyed ignition switch turns clockwise to the on and start positions. The engine turns over with the switch in the start position. Release the key after the engine starts. On the 2013HSP, the kill switch turns to the start position. The engine turns on when the pull-cord is pulled.
3. When the engine is running, the Tach/Hour Meter display will indicate the engines RPM. When the engine is shut off, the display will switch to run time, initially in minutes, and then switching to hours after the first hour of operation.
4. The Transmission Speed Lever moves the saw forward by pushing the lever away from the operator and moves the saw in reverse by pulling the lever toward the operator. Always place this control in central neutral position before using the engage/disengage lever or starting or stopping the engine.
5. The Throttle control increases engine rpm from slow (idle) at the bottom, to fast (full rpm) at the top.
6. Depth Gauge should be adjusted to zero when setting up the saw.
7. Use water hose bib for wetting cutting. After connecting hose, turn on the water at the source and use Water Control Lever to control flow of water to the blade. Be sure that both sides of the blade are getting adequate flow of water.
8. Water Control Lever is off in the vertical position and fully on in the horizontal position. It may be placed at in between settings to regulate the water flow.
9. The Transmission Engage/Disengage Lever is engaged in the full down position.
10. The Choke is located on the back panel for convenient cold starting.

HANDLEBAR ASSEMBLY

Follow the assembly instructions to prepare your saw for operation. FILLING OIL RESERVOIR

NOTE:
The engine is shipped with no oil in the crankcase. Refer to the engine manual for de-tails on the type and amount of oil required.
To fill the crankcase with oil, place the engine level. In order for this to be accomplished the blade must not be installed, and the depth adjustment must be down (until the engine is level).

NOTE:
The engine and oil must be warm and your saw must be on level ground to get an accurate oil level reading.

HYDRO-STATIC TRANSMISSION
The Hydro-Static Transmission is factory filled with fluid having a viscosity equivalent to SAE 20 W 20.

NOTICE
Do not overfill the expansion tank. Notice that the full level line is near the bottom of the expansion tank. Over filling will result in rupturing the seals on the hydromatic transmission and subsequent mechanical damage. BATTERY PREPARATION
The 12 volt battery is shipped wet and charged. Connect the battery leads according to the following steps to ensure that power is provided to the engines electric starter.

WARNING
When tightening the positive (+) battery cable end, do not contact the nega- tive (-) battery terminal with the wrench or other metallic objects. This could cause an electrical short and electrical sparking or an explosion of the battery. Be careful not to connect the battery in reverse polarity, as this will short circuit the battery charging system causing the fuse on the engine to become dam-aged, and also possibly resulting in an explosion of the battery.

DIAMOND BLADE INSTALLATION

NOTE:

1. When installing the blade retaining-bolt, ensure the threads of the bolt are aligned with the threads of the drive shaft so as not to “cross-thread” the bolt.
2. When installing the blade ensure that the blade shaft and flanges are free from dirt and all foreign material before mounting blade on the blade shaft. Tightening a blade against an uneven surface can cause fracture or cause the blade to run out of alignment.
3. Blade shaft threads are left-handed on the right side of the saw and right-hand on the left of the saw.

CAUTION
Diamond Blades improperly used are dangerous. Comply with American National Standards Institute Safety Code, B7.1 and, Occupational Safety and Health Act covering Speed, Safety Guards, Flanges, Mounting Procedures, General Operating Rules, Handling, Storage and General Machine Conditions.

NOTE:
Raise the blade as high as possible when maneuvering so that the blade will not strike the pavement. The blade is spinning when-ever the saw is running.

FILLING FUEL TANK

Refer to Engine Manual for detailed instructions.
WARNING

1. Gasoline is highly flammable and explosive. You can be burned or seriously injured when handling fuel.
2. To fuel, stop engine if running, and allow it to cool.
3. Fuel in a well-ventilated area.
4. Keep gasoline away from appliance pilot lights, barbecues, electric appliances, power tools, etc.
5. Wipe up spills immediately. Do not start engine until spill is dry.
6. When filling the fuel tank do not overfill. Always leave enough area for expansion due to environmental heating.

NOTE:

1. Fuel can damage paint and plastic. Be careful not to spill fuel when filling the fuel tank. Damage caused by spilled fuel IS NOT covered under the warranty.
2. DO NOT use stale or contaminated gasoline, or an oil/gasoline mixture.

SET-UP

FRONT POINTER ALIGNMENT
The Front Pointer is set in line at the factory. However, the pointer should be checked for proper alignment with the blade after every use.

PRE-START INSPECTION
The pre-start inspection should be performed before beginning any job.

ADJUSTING DEPTH OF CUT GAUGE

BLADE SPEED AND THROTTLE SETTING

Since diamond blades cut best at specific rim-speeds, blades of different diameters must be turned at different blade shaft rpm’s.
The MK-2013 will run a 16″ through 18″ blade.
Safe, efficient, economical cutting performance will occur at the engine rpm (as read on the tachometer) stipulated on the following chart.

The MK-20 Series engine shaft to blade shaft ratio is 1:895.

WARNING

Operating saw blades at rotational speeds greater than those recommended by the manufacturer can cause blade damage and possibly subsequent per-sonal injury.
Never exceed 3600 rpm blade shaft speed.

• The MK-20 Series, it is possible to cause overspeeding of the blade at throttle settings above those stipulated on the above chart; DO NOT EXCEED THESE ENGINE RPM SETTINGS!

OPERATION

STANDARD OPERATION
The MK-20 Series is intended for industrial applications and operated by experienced professionals. The operator must be aware of the machine’s capabilities and limitations. It is the operators respon-sibility to use this machine under safe working conditions and conform with federal, state and local codes or regulations pertaining to safety, air, pollution, noise etc…

CAUTION

1. Prior to operation of this machine the operator must determine the existence and location of any subsurface features that may be hazardous or could damage the equipment, (i.e. electric cable, natural gas line etc…)
2. If the saw should stall for any reason, raise the blade out of the cut before restarting the engine.
3. DO NOT crank engine for more than 30 seconds at a time. If engine fails to start, wait about 2 minutes between cranking periods to prevent starter from overheating.
4. Allow engine to warm up at least 3 minutes before applying load. When engine is warm, throttle may be used out to maximum position. Special pre cautions should be taken during the break-in period as specified by the Engine Manual.

NOTE: Read the engine instructions manual before starting saw. NOTE:
Perform the cut using only enough pressure to follow the original marked line. The saw has a natural tendency to pull towards the side on which the blade is mounted. To assure straight line cutting, apply pressure to the appropriate handle. If excessive pressure is required reduce the forward speed of the saw. Driving the saw too fast while cutting may cause the front wheels to lift causing the blade to cut at uneven depths. Do not attempt to steer the saw. Sudden and severe corrections can cause the blade to be damaged or broken. NOTE:
Do not turn off engine while at full throttle.
If the engine has been run-ning hard and is hot do not shut engine off abruptly. Cool engine by removing load and allowing engine to run idle for 3 to 5 minutes. STEP CUTTING

1. Follow general instructions outlined in the section Standard Operation on page 19.

2. When deep sawing (more than 4″) or concrete with hard aggregate, sawing to full depth in several cuts should be made in incremental steps of 1-1/2 to 2 inches until the desired depth of cut is reached. In softer aggregates or asphalt, it may be possible to saw full depth in two passes.

3. Gradually move the speed control lever forward to increase the cutting speed. If the blade stalls in the cut (which can happen when deep sawing) immediately raise blade from cut. If not done
   at once, the belts will spin freely and burn. Check belts for proper tension and continue sawing at a slower rate of speed.

4. On final pass, lower the blade until it hits the sub-base (sandy color will appear in the water being discharged from the cut). Raise blade approximately 1/2″ from bottom. The sand and gravel particles of the sub-base may cause premature wear or damage to the saw blade.

5. It is common, on the final pass of the cut, for pavement to wedge blade, particularly on a hot day. When this happens, immediately stop engine. If the blade is wedged, remove the Blade Shaft Bolt and Outside Collar and move the saw away from the blade. To remove a wedged blade from the concrete, use a jack hammer and carefully chip out concrete around the blade. (Pounding or twisting the blade may cause severe damage).

6. Go slowly with a new blade until it “opens up” that is, until you can see and feel the diamonds.

7. Small corrections can be made by leaning on handles.
   Deep sawing is very hard on saws and blades. Experienced operators soon get a “feel” for the saw and are constantly on guard to slow down when they hit excessive steel or hard aggregate.

DRY CUTTING

NOTE:

1. Ensure the blade you are using is clearly marked for dry cutting.
2. Check the condition of the air filter at least every four hours of operation. Refer to Engine Manual for details.

Airflow helps to cool the blade during dry cutting. Cutting too deep with one pass, or exerting exces-sive forward or side pressure can be dangerous and cause damage. Step cut in increments of 2 inches or less, for best results. Thinner blades are especially advantageous when cutting dry.

WARNING
Dry cutting has the potential to expose you to high levels of crystalline silica. Repeated and/or substantial inhalation can cause serious or fatal respiratory diseases including silicosis. For more information go to www.P65Warnings. ca.gov. Employ dust controls and protection per OSHA/NIOSH/MSHA.

BLADE GUARD REPOSITIONING

WARNING
Do not operate saw with any guards removed. Turn master engine switch to off position to avoid accidental starts when removing guards.

EMERGENCY ENGINE SHUTDOWN

CLEANUP

CAUTION
Engine parts are extremely hot following use, allow engine to cool 1/2-hour before cleaning. Use care during cleanup to avoid injury.

NOTE:

1. To extend operating life, the Concrete Saw should be cleaned following every use.
2. Using a garden hose or pressure washer is not advised as it can force water into the air cleaner or muffler opening. Steam cleaning is the preferred method of cleaning.
3. Use care when cleaning around electrical components.

MAINTENANCE

MAINTENANCE SCHEDULE
Item should be performed at every indicated hour(s) or interval period whichever goes first.

Maintenance Schedule| Maintenance Operation| Daily| 25 Hours or Weekly| 100 Hours or Seasonal
---|---|---|---|---

Air Filter

|

Check

| Every 4 Hours When Dry Cutting

Every 8 Hours When Wet Cutting

| |
Change Air Filter| | | •
Hydrostatic Transmission/Reservoir| Check Oil| •| |
Mainframe| Blade Shaft Bearings| Lube Blade Shaft Bearings at end of Operations| |
Pivot Bearings| | •|

Chain Drive

| •| | Adjust Tension

•

Transmission Control Assemblies| | •|
Battery| | •|

V- Belts

| | •| Replace

•

Battery| Check Water Level| | •|
Engine| Definitive information on engine maintenance is contained in the Engine Manual provided separately. Perform all maintenance procedures as recommended by the engine manual.

MAINTENANCE SAFETY

• Always turn the master engine switch to the off position.
• NEVER lubricate components or attempt service on a running machine.
• Keep the machinery in proper running condition.
• Fix damage to the machine immediately and always replace broken parts, or missing decals.

NEW MAINTENANCE
Perform the following after initial purchase and operation of the saw.

Maintenance Following Use
The following maintenance should be performed following each use.

Weekly (50 hours) and Monthly (200 hours)
The following should be performed monthly. Items should be lubricated using waterproof grease. NOTE:
Definitive information on engine maintenance is contained in the engine manual provided separately. Perform all maintenance procedures as recommended by the Engine Manual.

500 Hours and 1000 Hour Maintenance
Perform the following maintenance every 500 hours.

Yearly and Two-Year Maintenance
Perform the following maintenance every year.

Check Fuel Level
For all Engine related maintenance and troubleshooting refer to the Engine Manual.

WARNING

1. Gasoline is highly flammable and explosive. You can be burned or seriously injured when handling fuel.
2. To fuel, stop engine if running and allow it to cool.
3. Refuel in a well-ventilated area.
4. Keep gasoline away from appliance pilot lights, barbeques, electric appliances, power tools, etc.
5. Wipe up spills immediately.

NOTE:

1. Fuel can damage paint and plastic. Be careful not to spill fuel when filling the fuel tank. Damage caused by spilled fuel IS NOT covered under the warranty.
2. DO NOT use stale or contaminated gasoline or an oil/gasoline mixture.

Engine Maintenance
Engine maintenance and adjustment is necessary to keep the saw in good operation condition. Main-tenance operations include oil changes, filter changes, air cleaner, spark plug, fuel filter etc…Perform all maintenance procedures as recommended by the Honda engine manual provided separately.

Engine Air Filter Inspection, Cleaning and Replacement

Spark Plug Adjustments and Replacement

For all Engine related maintenance and troubleshooting refer to the Engine Manual.
CAUTION DO NOT work around the engine while hot.

Electrical System

A fuse protects the battery charging circuit. The fuse and the battery are the only user serviceable parts of the electrical system, a short circuit or a battery connected in reverse polarity will blow the fuse. Refer to the Engine Manual for the location and type of fuse. The fuse on the Engine is located between the starter solenoid and the engine, and is rated at 30 amps.

CAUTION
If the fuse blows, determine the cause of the problem before resuming operations.

Battery
Check water level weekly. Add distilled water if necessary. Check terminal cables and remove any de-posits. Remove the battery for recharging and follow the instructions for recharging. Damage can result to the battery and electrical system if the battery is charged or installed in reverse polarity. Make sure that the negative terminal is connected to ground.
Remove and install battery as per instructions in Assembly Section of this manual. Be careful not to contact metal while loosening positive terminal with tools.

CAUTION
Observe all battery precautions as outlined in the Assembly Section of this manual.

Belt Adjustment and Replacement

This machine is equipped with two heavy duty V-belts which are tensioned properly at the factory. These must be re-tensioned after the first half day of operation and periodically thereafter. Adjust to the original tension as set at the factory, which is approximately 1/4 inch of defection of the center of the belt halfway between the pulley on the motor and the pulley on the blade shaft.
To adjust belt tension, first remove the belt guard. With the belt guard removed, loosen motor mount bolts. Loosen the lock nut and adjust set bolt on the motor tension adjuster until the required belt tension is achieved.
Retighten the motor mounting bolts.

The two most common causes of misalignment are shown in the drawings. NOTE:
Gap between steel straight edge and sheave.

• A. the engine drive shaft and the blade shaft are not parallel.
• B. the pulleys are not located properly on the shafts.

Never make adjustments to belts or pulleys while engine is running.

CAUTION
DO NOT OVER TENSION as damage to belts and bearings may occur. Belts that are too loose may slip, resulting in short life and loss of power to the blade shaft. If any belts are worn or damaged, replace the complete set.
The motor mounting plate must be maintained parallel to the frame. Make sure all lock nuts are tightened and retighten the bracket bolts.

ACCESSORIES

ORDERING & RETURN

You may order MK Diamond products through your local MK Diamond distributor or, you may order direct from MK Diamond.
When ordering direct from MK Diamond, please have the following information ready before calling:

• The Model Number of the saw
• The Serial Number of the saw
• Where the saw was purchased and when
• The Part Number for the part(s) being ordered
• The Part Description for the part(s) being ordered

NOTE: Standard orders are $50.00 or more when ordering direct from MK Diamond. A $6.00 charge will be added to orders having a net billing value under $50.00. A nominal handling fee of $5.00 may apply to some orders.
All parts may be ordered by calling toll free to – 800 421-5830 or 310 539-5221 and asking for Customer Service. For technical questions, call – 800 474-5594.

RETURN MATERIALS POLICY

To expedite the service relative to the return of a product purchased through MK Diamond, please observe the following:
NOTE: When returning all items, they must have been purchased within the previous twelve (12) months.

• Have the Model Number of the saw
• Have the Serial Number of the saw
• Have the location of where the saw was purchased
• Have the date when the saw was purchased
• Contact Customer Service for approval to return the item(s)
• Obtain a Returned Goods Number (RGA) authorizing the return
• Follow the packaging instructions in the following section
• Ensure the RGA number is on the outside of the returned package
• Ensure your item(s) are prepaid to the destination
  For returned items, call toll free to – 800 421-5830 or 310 539-5221 and ask for Customer Service.

PACKAGING INSTRUCTIONS

• Remove the Cutting Head and Support Angle Assembly
• Dry the saw before shipping
• When packing, include the following: Saw, Diamond Blade, Blade Guard and Support Angle Assembly and Adjustable Cutting Guide (Other Accessories are not required)
• Package the unit in its original container or one of comparable size (do not ship the unit partially exposed)
• Ensure all parts are secured in the packaging to prevent moving

AUTHORIZED SERVICE CENTERS

For quicker repair time, you may contact MK Diamond Customer Service, toll free, at 800 421-5830 or 310 539-5221 for the Authorized Service Center closest too you or visit our web site at www.mkdiamond.com. For technical questions, call – 800 474-5594.

WARRANTY

CONTACT
Please contact MK Diamond Products, Inc. Customer Service Department with any questions you might have regarding distributors, parts or service.
Telephone: 800-421-5830
Fax: 310-539-5158
E-mail: Customer_Service@MKDiamond.com
Customer Service Hours: Monday through Friday, 6AM-4PM PST
MK Diamond Products, Inc.
1315 Storm Parkway
Torrance, CA 90501

MK DIAMOND PRODUCTS, INC. LIMITED WARRANTY

MK DIAMOND PRODUCTS, INC. will guarantee every machine they build, to be free from defects in material and workmanship for (1) one year from date of purchase. The obligation of MK DIAMOND PRODUCTS, INC. under this warranty is limited to the repair or replacement of any parts which, under normal use, prove to be defective in material or workmanship. The parts involved or the unit in question should be returned to MK DIAMOND PRODUCTS, INC. or to a point designated by us, transportation prepaid.

This warranty does not obligate us to bear the cost of labor or transportation charges in connection with replacement or repair of defective parts. Likewise, it shall NOT apply to any unit which has been subjected to misuse, neglect or accident. This warranty does NOT apply to any machine which has been repaired or altered outside our factory.
This warranty does NOT obligate MK DIAMOND PRODUCTS, INC., with respect to items not of our manufacture, such as engines, motors, hydraulics, etc., which are subject to their own guarantees and warranties.

We shall in no event be liable for consequential damages or contingent liabilities arising out of failure of any equipment or parts to operate properly.
WARRANTY: For your (1) one year warranty to be effective, complete the online Product Registration as soon as possible. Visit www.mkdiamond.com/registration
© COPYRIGHT 2019, MK DIAMOND PRODUCTS, INC. ALL RIGHTS RESERVED.

The MK Diamond logo is a registered trademark of MK Diamond Products, Inc. and may not be used, reproduced, or altered without written permission. All other trademarks are the property of their re-spective owners and used with permission.
MK Diamond may have patents, patent applications, trade marks, copyrights of other intellectual property right covering this product in this document.
This manual MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and should remain with the unit if resold.
The information and specifications included in this publication were in effect at the time of approval for printing.

MK Diamond Products, Inc. 1315 Storm Parkway Torrance, CA 90501
Toll-Free: 800-421-5830 Phone: 310-539-5221 Fax: 310-539-5158 www.mkdiamond.com

References

• www.ca.gov | California State Portal
• oehha.ca.gov/prop65/law/P65law72003.html
• Preventing Silicosis & Deaths in Construction Workers | NIOSH | CDC
• Respirators | NIOSH | CDC
• California Code of Regulations, Title 8, Construction Safety Orders
• MK Diamond Products
• MK Diamond - Home
• MK Diamond - Home
• Silica, Crystalline - Overview | Occupational Safety and Health Administration
• P65Warnings.ca.gov

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>