MK Diamond MK-20 User Manual

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Page 1

www.mkdiamond.com

Gas Powered

Concrete Saw

MK-20 SERIES

OWNER’S MANUAL,

OPERATING INSTRUCTIONS

& PARTS LIST

Revision 304

Manual Part# 156777

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

05.2013

Page 2

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 nest 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:

NOTE: For your (1) one year warranty to be effective, complete the warranty card

(including the Serial Number) and mail it in as soon as possible.

Page 3

TABLE OF CONTENTS

SAFETY

Safety Messages 4 Damage Prevention Message 4 General Safety Precautions and Hazard Symbols 5 California Proposition 65 Message 8 Prestart Safety 9 Safety Label Locations 10 Product Specications 11

UNPACKING, TRANSPORT and ASSEMBLY

Unpacking 12 Contents 12 Transport 13 Assembly 14-15

SET-UP, OPERATION and SHUTDOWN

Set-Up 16-18 Operation 19-22 Shutdown 23 Cleanup 23

MAINTENANCE

Maintenance 24-30

EXPLODED VIEW & PARTS LIST

Figure 1 Assy, Saw 2020HSP Part # 156498 32-36 Figure 2 Assy, Saw 2024HSP Part # 158777 37-41 Figure 3 Frame, Less Engine Part # 169713 42-45 Figure 4 Assy, Blade Shaft Part # 156654 46 Figure 5 Engine, Honda GX630 Part # 169713 47 Figure 6 Engine Honda GX690 Part # 170048 48 Figure 7 Assy, Pointer Part # 166465 49

ORDERING and RETURN INSTRUCTIONS

Ordering Information 50 Return Material Policy 50 Packaging Instructions 50 Authorized Service Centers 50 Contact Information 51 Warranty 51

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MK-20 SERIES SAFETY

Safety precautions should be followed at all times when operating this equipment. Failure to read and understand the Safety Precaution and Operating Instructions could result in injury to yourself and others.

This Operation Manual has been developed to provide complete instructions for the safe and efcient operation of the MK-20 Series. For additional instruction concerning engine operations and care refer to the engine manufacturers instructions.

Before using this saw, ensure that the person operating the equipment has read and understands all instructions in this manual.

Descriptions, illustrations, and photos are as accurate as possible at the time of publication. Photos may include optional equipment or accessories and may not show all models covered by this manual.

SAFETY MESSAGE / ALERT SYMBOLS

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.

Each message tells you what the hazard is, what can happen, and what you can do to avoid or reduce injury. Other important messages are preceded by the word NOTICE.

NOTICE

You can cause PROPERTY DAMAGE to your machine if you don’t follow directions.

The safety labels should be periodically inspected and cleaned by the user to maintain good legibility at a safe viewing distance. If the label is worn, damaged or illegible, it should be replaced. Contact MK Diamond or your dealer for replacement.

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.

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MK-20 SERIES SAFETY

(

)

GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS

SAFETY PRECAUTIONS

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

GENERAL SAFETY

DO NOT operate or service this equipment before reading this entire manual.

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

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

medicine.

NEVER operate this equipment under the inuence of drugs or alcohol.

Whenever necessary, replace nameplate, operation and safety decals when they become difcult 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.

KEEP GUARDS IN PLACE

In order to prevent injury, keep guards in place and in working order at all times.

EXPLOSIVE FUEL!

Gasoline is extremely ammable, its vapors can explode if ignited; store only in approved containers, in well-ventilated, unoccupied buildings and away from sparks or ames. Do not ll the fuel tank while the engine is running or hot. Spilled fuel could ignite if it contacts hot parts or sparks from ignition. Do not start the engine near spilled fuel. Never use gasoline as a cleaning agent. Never operate the machine in an explosive atmosphere.

LETHAL EXHAUST GASES

Engine exhaust gasses contain poisonous carbon monoxide, an odorless colorless gas that can cause death if inhaled. Avoid inhaling exhaust fumes, and never run the engine in a closed building or conned area.

ENGINE OVER-SPEED

Never tamper with the governor components or settings to increase the maximum speed of the machine. Severe personal injury and/or equipment damage could result if the equipment is operated speeds above design maximum.

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MK-20 SERIES SAFETY

ACCIDENTAL STARTS

Before starting the engine, be sure the ON/OFF switch is in the “OFF” position to prevent accidental starting. Place the ON/OFF switch in the OFF position before performing any service operation.

ROTATING OR MOVING PARTS

Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never operate a power tool with 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.

ALWAYS USE SAFETY GLASSES

Safety glasses should always be worn when working around power tools. Everyday eyeglasses only have impact resistant lenses and may not prevent eye injury; they are NOT safety glasses.

ALWAYS USE RESPIRATORY PROTECTION

Exhaust gases may be harmful if inhaled. Do not operate gas-powered equipment in enclosed spaces. Respiratory protection should be worn when operating gas powered equipment.

ALWAYS USE HEARING PROTECTION

To reduce the possibility of hearing loss, always use hearing protection when operating equipment.

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.

DO NOT USE IN DANGEROUS ENVIRONMENTS

Do not operate equipment in dangerous environments. Always keep the work area well lighted.

KEEP CHILDREN AWAY

All visitors and children should be kept a safe distance from work area.

MAKE WORKSHOP KID PROOF

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

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MK-20 SERIES SAFETY

DO NOT FORCE THE TOOL

A power tool will do a job better and safer operating at the rate for which it was designed.

USE THE RIGHT TOOL

Do not force a tool or an attachment, to do a job that it was not designed to do.

WEAR PROPER APPAREL

Do not wear loose clothing, gloves, neckties, rings, bracelets, or other jewelry that may be caught in moving parts. Nonslip footwear is recommended. Wear protective hair covering 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.

MAINTAIN TOOLS WITH CARE

Keep tools sharp and clean for the best and safest performance. Always follow maintenance instructions for lubricating and when changing accessories.

SHUTDOWN TOOL

The saw should always be shutdown before servicing or when changing accessories such as blades, bits, cutters, etc...

USE RECOMMENDED ACCESSORIES

Consult the owner’s manual for recommended accessories. Using improper accessories may increase the risk of personal or by-stander injury.

NEVER STAND ON THE TOOL

Serious injury could occur if a power tool is tipped, or if a cutting tool is unintentionally contacted.

NEVER LEAVE TOOL RUNNING 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 nished.

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 safety. Always check moving parts for proper alignment or binding. Check for broken parts, 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.

DIRECTION OF FEED

Always feed work into a blade or cutter against the direction of rotation. A blade or cutter should always be installed such that rotation is in the direction of the arrow imprinted on the side of the blade or cutter.

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MK-20 SERIES SAFETY

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)

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 addition, 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 contain 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, 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

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 lter out microscopic particles. Where use of a dust extraction device is possible, it should be used. To achieve a high level of dust collection, use an industrial vacuum cleaner.

WARNING

Sawing and drilling generate dust. Excessive airborne particles may cause irritation to eyes, skin and respiratory tract. To avoid breathing impairment, always employ dust controls and protection suitable to the material being sawed or drilled; See OSHA (29 CFR Part 1910.1200).

Page 9

MK-20 SERIES SAFETY

OPERATION & SAFETY DECALS

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

DANGER

WARNING

(A)

(B)

(C)

(D)

The exhaust from this product

(E)

contains chemicals known to the State of California to cause cancer, birth defects or other

reproductive harm.

DO NOT operate this equipment before reading the owners’ manual!

CAUTION

WARNING

In the event of blade failure, replace blade guard immediately.

WARNING

DO NOT operate without guards in place.

(3 of them)

DANGER

Accidental start hazard. Disconnect spark plug prior to servicing.

Lethal exhaust gases. Use only in well ventilated areas. DO NOT use indoors.

WARNING

When refueling stop engine and allow to cool.

DO NOT overﬁll

tank.

CAUTION

DO NOT touch hot surface.

CAUTION

FOR INFORMATION ON

SERVICE OR WARRANTY

PLEASE CALL

1-800-474-5594

CAUTION

Keep hands and feet clear.

(F)

(G)

(H)

(I)

(J)

(K)

WARNING

Handle bar NOT a lifting point.

NOTICE

Overtensioning of belts will result in premature crank and/or bearing failure.

(L)

(M)

Concrete Saw Warning Label Sheet Part# 166009

(N)

Location Description

Frame Read Manual

Frame Proposition 65, Dust Warning

Shaft Cover & Belt Guard Guards in Place

Blade Guard Replace Blade Guard

Gas Tank/Top Exhaust/Cancer

Gas Tank/Top Lethal Exhaust

Gas Tank/Top Refueling

Gas Tank Hot Surface

Blade Guard Accidental Start

Frame/Back Service (Not Shown)

Frame/Front Hand & Feet Clear

Handle Lifting Point

Belt Guard Overtensioning Belts

Console Machinery Hazard

Page 10

MK-20 SERIES

PRODUCT SPECIFICATION

PRODUCT SPECIFICATIONS

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, Kohler, Subaru or Vanguard gas engine. The saw is capable of 6-5/8” depth of cut with an 18” blade and 7-5/8” depth of cut with a 20” blade.

Motor and Weight Specications

Motor and Weight specications for the MK-20 Series are listed below.

Model

Engine Honda (Gas) Subaru (Gas) Subaru (Gas) Vanguard (Gas)

Power GX390 EH41 EH41 V-Twin

Starter Pull Electric Pull Pull

Fuel Capacity 1.6 Gallons 1.6 Gallons 1.6 Gallons 1.6 Gallons

Blade Capacity 18” 18” 18” 18”

Blade RPM 3,400 3,400 3,400 3,400

Depth of Cut 6-5/8” (167 mm) 6-5/8” (167 mm) 6-5/8” (167 mm) 6-5/8” (167 mm)

Weight 310 lbs. (141 kg) 290 lbs. (132 kgs) 310 lbs. (141 kg) 310 lbs. (141 kg)

Part # 156499 155714-S 156499-S 169949

Model

Engine Kohler (Gas) Honda (Gas) Honda (Gas) Subaru (Gas)

Power CH440 GX630 GX360 EH65

Starter Pull Electric Electric Electric

Fuel Capacity 1.6 Gallons 1.6 Gallons 1.6 Gallons 1.6 Gallons

Blade Capacity 18” 20” 20” 20”

Blade RPM 3,400 2,863 2,863 2,850

Depth of Cut 6-5/8” (167 mm) 7-5/8” (194 mm) 7-5/8” (194 mm) 7-5/8” (194 mm)

Weight 310 lbs. (141 kg) 392 lbs. (178 kgs) 398 lbs. (181 kg) 398 lbs. (181 kg)

Part # 168798 156498 158777 168952

MK2013HSP MK-2013SE MK-2013SSP MK-2013VSP

MK2014K MK-2020HSP MK-2024HSP MK-2022SSP

Blade

The MK-20 Series uses a 18” to 20” diameter diamond blade.

Concrete Saw Usage

The MK-20 Series is designed to cut various grades of concrete surfaces.

Page 11

MK-20 SERIES UNPACKING

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 at surface. Two people are required to lift saw.

CONTENTS

In the containers, you will nd one (1) MK-20 Series Saw, one (1) Blade Nut Wrench, one (1) Handlebar, two (2) Handlebar Bolts and Washers, one (1) Pointer, one (1) MK-20 Series Owner’s Manual, one (1) Engine Owners Manual, one (1) Warranty Card.

MK-20 Series

Saw

www.mkdiamond.com

Gas Powered Concrete Saw

MK-20 SERIES

OWNER’S MANUAL &

OPERATING INSTRUCTIONS

1 Blade Nut

Wrench

Handlebar

Bolts and Washers

Pointer

03.2012

Revision 201

Manual Part# 156777

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

MK-20 Series

Owner’s Manual

Engine Manual Warranty

Card

Page 12

MK-20 SERIES TRANSPORT

TRANSPORT

CAUTION

1. The MK-20 Series weighs approximately two hundred and thirty-ve (235 pounds), use care when transporting.

2. Two people are required to lift and transport the MK-20 Series.

DESCRIPTION OF CONTROLS

1. The Depth Control Wheel raises the blade when rotated clockwise, and lowers the blade when rotated counterclockwise.

2. 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.

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 rst 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 bibb for wetting cutting. After connecting hose, turn on the water at the source and use Water Control Lever to control ow of water to the blade. Be sure that both sides of the blade are getting adequate ow 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 ow.

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.

Page 13

MK-20 SERIES ASSEMBLY

Follow the assembly instructions to prepare your saw for operation.

HANDLEBAR ASSEMBLY

(A)

Locate the threaded holes on

both sides of the handlebar.

FILLING OIL RESERVOIR

NOTE:

The engine is shipped with no oil in the crankcase. Refer to the engine manual for details on the type and amount of oil required.

To ll 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).

(B)

Align the handlebar with the

holes on both sides of the frame at

the desired height.

NOTE:

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

(C)

Install one Washer onto each bolt.

Install bolt through the Handlebar

and into the holes and tighten.

(A) Verify the Oil Drain Cap is installed onto the Oil Drain Line and is tight. Refer to Engine Manual for details.

Page 14

MK-20 SERIES ASSEMBLY

HYDRO-STATIC TRANSMISSION

The Hydro-Static Transmission is factory lled with uid having a viscosity equivalent to SAE 20 W

20.

Do not overll the expansion tank. Notice that the full level line is near the

NOTICE

(A)

Check the oil level on the expansion

tank to ensure that the transmission

has adequate uid.

bottom of the expansion tank. Over lling 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.

(A)

Remove the front tower panel to ob-

tain access to the battery terminals.

Connect the positive (+) battery

cable to the positive battery terminal.

Connect the negative battery cable

to the negative terminal. Tighten

the cap screws and nuts securely

to assure proper electrical contact.

(B)

Replace panel.

When tightening the positive (+) battery cable end, do not contact the nega-

WARNING

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 damaged, and also possibly resulting in an explosion of the battery.

Page 15

MK-20 SERIES ASSEMBLY

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 anges 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.

(A)

Open the Blade Guard Cover.

Locate the Blade Shaft Nut and the

Outer Flange.

(B)

Loosen the Blade Shaft Nut while

holding the Shaft Wrench steady.

(C)

Remove the Blade Nut and Outer

Flange.

(D)

Install the Diamond Blade onto the

Blade Shaft and Drive Pin. Ensure

directional arrow on the blade indi-

cates proper rotational direction.

(G)

Tighten Blade Shaft Nut holding

the Blade Shaft steady. Lower and

close Blade Guard.

(E)

Install the Outer Flange. Verify the

drive pin is seated; it must project

through the hole in the blade and into

the ange.

WARNING

Do not operate the saw without the proper Blade Guard covering. Ensure that the blade exposure does not exceed 180 degrees during operation.

DO NOT use woodcutting, or carbide blades on this machine! Use ONLY Diamond blades on machine.

NOTE:

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

(F)

Install the Blade Shaft Nut.

Page 16

MK-20 SERIES SET-UP

FILLING FUEL TANK

WARNING

NOTE:

1. Gasoline is highly ammable 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, barbeques, electric appliances, power tools, etc.

5. Wipe up spills immediately. Do not start engine until spill is dry.

6. When lling the fuel tank do not overll. Always leave enough area for expansion due to environmental heating.

1. Fuel can damage paint and plastic. Be careful not to spill fuel when lling 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.

1 inch (25mm)

from throat

Maximum Fuel

Level

(A)

Remove the Fuel Cap.

Ensure fuel level is 1” below the

throat of the Fuel Tank.

(B)

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.

(A)

Using a straight edge, care-

fully mark a line 12 feet long on

a smooth level concrete surface.

Place Saw parallel to line; lower

Blade and center it over the line.

With the Blade centered over the

line and the Saw Frame parallel

to the line, lower the front Pointer

assembly and position the pointer

(B)

over the line.

(C)

Adjust the Pointer in or out if the

orange wheel is off the line by loosening the thumbscrew on the end of pointer. Align orange wheel with line

and tighten thumbscrew. Roll saw

along the entire length of the line to

ensure proper alignment.

Page 17

MK-20 SERIES SET-UP

PRE-START INSPECTION

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

(A)

Inspect Blade for damage for

cracks and wear, replace if nec-

essary. Verify the Blade is cor-

rect for the material being cut.

Proper Oil Level

Low Level

(D)

Check for proper oil level.

Refer to Engine Manual for details.

(B)

Inspect Engine for leaks.

Make sure surfaces are clean

and unobstructed.

1 inch (25mm)

from throat

Maximum Fuel

Level

(E)

Ensure fuel level is 1” below the

throat of the Fuel Tank.

(C)

Inspect the saw for general dam-

age and/or loose hardware. Check

that the equipment covers and

guards are in place and securely

fastened.

(F)

Check the Air Filter for

cleanliness. Refer to Engine Manual

for details.

WARNING

• 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 modications will void all warranties. Manufacturer does not assume responsibility for any accident due to equipment modications.

• NEVER use accessories or attachments, which are not recommended by MK Diamond for this equipment. Damage to the equipment and/or injury to user may result.

Page 18

MK-20 SERIES SET-UP

(

)

ADJUSTING DEPTH OF CUT GAUGE

(A)

Turn Crank Wheel until Blade

touches the ground.

Turn the Depth Gauge Indicator

dial clockwise until it reads zero.

BLADE SPEED AND THROTTLE SETTING

Since diamond blades cut best at specic rim-speeds, blades of different diameters must be turned at different blade shaft rpm’s. The MK-2013/14 will run either a 16” or 18” blade and the MK-2020/24/22 HSP will run a 16” through 20” blade. Safe, efcient, economical cutting performance will occur at the engine rpm (as read on the tachometer) stipulated on the following chart.

Blade Diameter set engine rpm to*

14” full throttle (3500) 16” 3200-full throttle 18” 2850-3300 20” 2550-3000

(B)

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 personal 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!

Page 19

MK-20 SERIES 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 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...

CAUTION

WARNING

NOTICE

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...)

Be sure blade is unobstructed and not resting on ground. Be sure hands and feet are clear of blade.

Carbon monoxide gas is toxic, breathing it can cause unconsciousness and/or death. Ensure that the space is adequately ventilated.

Avoid any areas or actions that expose you to carbon monoxide.

If the saw should stall for any reason, raise the blade out of the cut before restarting the engine.

Read the engine instructions manual before starting saw.

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.

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 precautions should be taken during the break-in period as specied by the Engine Manual.

(A)

Use the Depth Control Wheel to

raise the blade clear of the oor.

(B)

Attach the cooling supply hose

to the Cooling Inlet, if wet cut-

ting.

(C)

Layout and mark the area to be

cut using a chalk-line. Align Pointer

and Blade to chalk-line.

Page 20

MK-20 SERIES OPERATION

(D)

Place Transmission Speed

Lever in Neutral.

(G)

Start engine by rotating Ignition

Switch to the right.

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.

(E)

Verify Neutral Engagement Handle

is down, in Neutral. Choke engine

as required for cold starting.

(H)

For Wet Cutting, open Cooling

Supply Valve. Verify proper cooling

ow and adjust the water ow on

the Blade to a desired amount.

(F)

Push Engine Throttle Handle up

half-way.

(I)

Move the throttle all the way for-

ward to “Fast” position.

(J)

Slowly lower the Blade until the

desired level is reached and begin

the cut.

(K)

When the cut is complete, raise

the Blade completely out of the cut

by turning Depth Control Wheel

counter-clockwise.

(L)

Close Cooling Supply Valve.

Page 21

MK-20 SERIES OPERATION

NOTE:

Do not turn off engine while at full throttle.

NOTICE

If the engine has been running hard and is hot do not shut en-

(M)

Move the Throttle Lever to lower

blade speed.

Turn off engine by rotating

Ignition Switch to off position.

(N)

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 nal 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 nal 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.

gine off abruptly. Cool engine by removing load and allowing engine to run idle for 3 to 5 minutes.

DRY CUTTING

NOTE:

1. Ensure the blade you are using is clearly marked for dry cutting.

2. Check the condition of the air lter at least every four hours of operation. Refer to Engine Manual for details.

Airow helps to cool the blade during dry cutting. Cutting too deep with one pass, or exerting excessive 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.

Page 22

MK-20 SERIES OPERATION

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.

(A)

Remove Diamond Blade.

(B)

Remove the Cooling Transfer

Hose from the Blade Guard by

pressing the quick release.

(C)

Locate the four Blade Guard Re-

taining Bolts.

(D)

Remove the Blade Guard

Retaining Bolts and remove the

Blade Guard.

(G)

Install the Blade Guard on the

opposite side of the saw.

(E)

Locate the Blade Shaft Cover

Retaining Bolts.

(H)

Install Diamond Blade

(F)

Remove the Blade Shaft Cover

Retaining Bolts and the Blade

Shaft Cover.

(I)

Install the Cooling Transfer Hose

to the Blade Guard.

Page 23

MK-20 SERIES CLEANUP

(J)

Install the Blade Shaft Cover.

EMERGENCY ENGINE SHUTDOWN

(A)

Place Engine Master Switch in the

OFF position.

CLEANUP

(K)

Remove the Pointer.

(B)

Move the Throttle Lever to lower

blade speed. Place Fuel Valve in

the OFF position.

(L)

Install the Pointer on the opposite

side, next to Blade Guard.

(See Front Pointer alignment Page

16)

CAUTION

NOTE:

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

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 mufer opening. Steam cleaning is the preferred method of cleaning.

3. Use care when cleaning around electrical components.

Page 24

MK-20 SERIES MAINTENANCE

(A)

Verify the engine is off and cool be-

fore beginning to clean. Clean the

saw with soap and water.

MAINTENANCE SCHEDULE

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

Maintenance Schedule Maintenance

Operation

Check

Air Filter

Change Air Filter

Hydrostatic Transmission/Reservoir

Mainframe

Check Oil

Blade Shaft Bearings

Clean water system outlets,

including water tubes in blade

(B)

Clean the remainder of the exterior

surface (except the engine).

guard.

Daily 25 Hours

or Weekly

Every 4 Hours When Dry Cutting

Every 8 Hours When Wet Cutting

•

Lube Blade Shaft Bearings at end of Operations

(C)

100 Hours or Seasonal

•

Pivot Bearings

Chain Drive

Transmission Control Assemblies

Battery

V-Belts

Battery Check Water Level

Engine

Denitive information on engine maintenance is contained in the Engine Manual provided separately. Perform all maintenance procedures as recommended by the engine manual.

•

Adjust Tension

•

Replace

•

Page 25

MK-20 SERIES MAINTENANCE

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.

(A)

Change engine oil after

rst month or rst 20 operating

hours (See Engine Manual).

Check and adjust tension on

all belts following rst

48 hours of operation.

(B)

Maintenance Following Use

The following maintenance should be performed following each use.

(A)

Shut down the Engine. Let saw cool

before proceeding.

(See Engine Manual).

(B)

Check Air Filter

(C)

Lubricate the Grease Fitting on the

Blade Shaft.

Page 26

MK-20 SERIES MAINTENANCE

(D)

Lubricate the zerk tting on each

wheel.

Lubricate the Cooling

(E)

Supply Valve.

(F) Verify the tightness of all bolts and screws. Clean the saw (except the

engine) with soap and water.

Weekly (50 hours) and Monthly (200 hours)

The following should be performed monthly. Items should be lubricated using waterproof grease.

(A)

Change engine oil every 100 hours.

Refer to Engine Manual for details.

Lubricate the Blade Shaft Bearings

(B)

(Monthly).

(C)

Clean engine Air Filter weekly and

replace monthly. Refer to Engine

Manual for details.

(D)

Clean Spark Plug Weekly and re-

adjust Spark Plug monthly. Refer to

Engine Manual for details.

NOTE:

Denitive information on engine maintenance is contained in the engine manual provided separately. Perform all maintenance procedures as recommended by the Engine Manual.

(E)

Clean and lubricate the Blade Shaft.

(F)

Clean and lubricate the Blade Re-

taining Bolt.

Page 27

MK-20 SERIES MAINTENANCE

500 Hours and 1000 Hour Maintenance

Perform the following maintenance every 500 hours.

(A)

Replace Spark Plug. Refer to En-

gine Manual for details.

Have Authorized Repair Shop per-

form 500-hour maintenance.

Yearly and Two-Year Maintenance

Perform the following maintenance every year.

(A)

Inspect belts for proper tension

and wear.

(B)

(C)

Have Authorized Repair Shop per-

form 1000-hour maintenance.

Page 28

MK-20 SERIES MAINTENANCE

Check Fuel Level

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

WARNING

NOTE:

1. Gasoline is highly ammable 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.

1. Fuel can damage paint and plastic. Be careful not to spill fuel when lling 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.

1 inch (25mm)

from throat

Maximum

Fuel Level

(A)

Remove the Fuel Cap. Refer to

Engine Manual for details.

Ensure fuel level is 1” below the

throat of the Fuel Tank.

(B)

Engine Maintenance

Engine maintenance and adjustment is necessary to keep the saw in good operation condition. Maintenance operations include oil changes, lter changes, air cleaner, spark plug, fuel lter etc...Perform all maintenance procedures as recommended by the Honda, Vanguard, Kohler or Subaru engine manual provided separately.

(A)

Remove the Diamond Blade.

Lower the MK-20 Series to

its lowest position.

(B)

(C)

Free the Oil Drain Line.

Place a catch basin below the

Oil Drain Line. Remove the Drain Cap to drain oil completely. Refer

to Engine Manual for details.

Page 29

MK-20 SERIES MAINTENANCE

Engine Air Filter Inspection, Cleaning and Replacement

(A)

Clean the Air Filter. Refer to

Engine Manual for details.

Spark Plug Adjustments and Replacement

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

CAUTION

(A)

When installing the Spark Plug,

ensure the threads are aligned with

the threads in the engine so as not to

“cross-thread” the plug.

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.

Page 30

MK-20 SERIES MAINTENANCE

Battery

Check water level weekly. Add distilled water if necessary. Check terminal cables and remove any deposits. 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.

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.

(A)

(B)

NOTE:

Gap between steel straight edge and sheave.

Page 31

NOTES

Page 32

MK-20 SERIES EXPLODED VIEW

FIGURE 1 - PARTS LIST: MK-2020HSP CONCRETE SAW - P/N 156498

Page 33

MK-20 SERIES PARTS LIST

FIGURE 1 - PARTS LIST: MK-2020HSP CONCRETE SAW - P/N 156498

ITEM

NO.

1 NUT, HEX, 5/16 - 18 101196 2

2 BELT, BX34 150764 2

3 SCREW, 3/8 - 16 X 1 -1/4 HEX HEAD CAP 150774 2

4 WASHER, FLAT, SAE 3/8 150923 17

5 WASHER, 1/2 SAE FLAT 150924 8

6 WASHER, LOCK, SPLIT, 3/8 150925 11

7 CLAMP, HOSE, 5.8 151198 4

8 NUT, 1/2 - 13 HEX 151282 4

9 SCREW, HEX HD, CAP, 5/16 - 18 X 3/4 151369 2

10 WASHER, 1/4 SAE FLAT 151915 12

11 NUT, 3/8 - 16 NYLOK HEX 152505 4

12 SCREW, HEX HD CAP, 3.8 -16 X 1 152507 10

13 WASHER, 1/2 SPLIT LOCK 153524 4

14 SCREW, HEX, 3/8 - 16 X 3.4 153527 1

15 SCREW, 1/2 - 13 X 1 -1/4 HEX HEAD CAP 153532 4

16 SCREW, 1/4 - 20 X 1/2 TRUSS HEAD 153880 10

17 NUT, HEX, TW, 1/4 - 20 153941 2

18 HOSE, 1/4 FUEL, 12” 154163 1

19 HOSE, 1/4 FUEL, 24” 154163 1

20 ELBOW, 1/4 MNPT STREET 154615 1

21 ELBOW, 1/8 MNPT X 1/4 BARB 90DEG 154652 1

22 BELT, AX-42 156110 1

23 GUARD, SHAFT (COMP) 156307 1

24 LIFTING BAIL 156543 1

25 BLADE, MK-799D 16 X 125 X 1 157769 1

26 NUT, HEX, NYLK, 5/16 - 18 158289 1

27 ASSY, BLD GRD 20” 158818 1

28 BELTGUARD (COMP) 159888 1

29 FITTING, PUSH ON HOSE 1/4 X 1/4 MALE 165183 1

30 ASSY, POINTER, CONC SAW 166465 1

31 CAP, 2” FUEL FILLER 167220 1

32 TANK, FUEL, 2.5 GAL 169353 1

33 ASSY, FRAME, LESS ENGINE 169719 1

34 VALVE, BALL, 1/4”M TO 1/4”F 231248 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 34

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 1 - PARTS LIST: MK-2020HSP CONCRETE SAW - P/N 156498

ITEM

NO.

1 WRENCH, BOX END, 1-1/2 X 9/16 137976 1

2 GRIP, HANDLE, 1/0 ID 150842 2

3 WASHER, FLAT, SAE, 3/8 150923 3

4 WASHER, LOCK, SPLIT, 3.8 150925 1

5 SCREW, HEX HD CAP, 3/8 - 16 X 1 152507 8

6 PULLEY, 1A30 X 1/2 BORE IDLER 153797 1

7 SPRING, 9.16 X 2.5 EXTENSION 153807 1

8 BRACKET, IDLER PULLEY 154244 1

9 WELDMENT, HANDLEBAR 156516 1

10 SCREW, HEX HEAD 3.8 - 16 X 1 - 1/2 LG. 156656 2

11 COVER, 8 - 4 AWG TERMINAL, RED 169355 1

12 ASSY, ENGINE, HONDA GX630 169713 1

13 ASSY, FRAME, LESS ENGINE 169719 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 35

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 1 - PARTS LIST: MK-2020HSP CONCRETE SAW - P/N 156498

ITEM

NO.

1 NUT, HEX, 1/4 -20 151893 4

2 WASHER, 1/4 SAE FLAT 151915 12

3 NUT, 3/8 -16 NYLOK HEX 152505 4

4 SCREW, HEX HD CAP, 1/4 - 20 X 1 152676 2

5 CABLE, 4GA X 48 RED BATTERY 153848 1

6 CABLE, 4GA X 24 BLACK BATTERY 153849 1

7 TACHOMETER/HOURMETER 153877 1

8 SCREW, 1/4 -20 X 1/2 TRUSS HEAD 153880 10

9 ASSY, THROTTLE CONTROL 155406 1

10 NUT, 10 -24 CLIP 155407 2

11 PANEL, TOWER LOWER BACK 156505 1

12 PLUG, HOLE PLASTIC 3/4” 156615 2

13 NUT, 3/8 - 24 HEX JAM 156623 1

14 SCREW, PAN HD SELF TAP 8 - 32 X 1/2 156632 2

15 BOX, BATTERY 156634 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 36

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 1 - PARTS LIST: MK-2020HSP CONCRETE SAW - P/N 156498

ITEM

NO.

16 SCREW, BTN HD 3/8 16 X 3/4 SOCK 156635 2

17 SCREW, PAN HD PHIL MS 10 24 X 3/4 156641 2

18 TAG, SERIAL #, BLANK 157500-RW 1

19 DRIVE SCREW, #7 X 5/16 ROUND HEAD 157849 2

20 STRAP, NYLON, 1” 158094 1

21 CABEL, CHOKE, HONDA (COMP) 158816 1

22 BATTERY, 12V, 35AH 162589 1

23 COVER, 1” BATTERY TERMINAL, RED 163940 1

24 TAPE, VHB, 5952 (3.0”) 166487 1

25 BRACKET, SWITCH 169714 1

26 WIRING HARNESS, GX630/690 169715 1

27 ASSY, FRAME, LESS ENGINE 169719 1

28 TAG, EVAP, 20S, PARENT 169736-205 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 37

MK-20 SERIES EXPLODED VIEW

FIGURE 2 - PARTS LIST: MK-2024HSP CONCRETE SAW - P/N 158777

Page 38

MK-20 SERIES PARTS LIST

FIGURE 2 - PARTS LIST: MK-2024HSP CONCRETE SAW - P/N 158777

ITEM

NO.

1 NUT, HEX, 5/16 - 18 101196 2

2 BELT, BX34 150764 2

3 SCREW, 3/8 - 16 X 1 -1/4 HEX HEAD CAP 150774 2

4 WASHER, FLAT, SAE 3/8 150923 17

5 WASHER, 1/2 SAE FLAT 150924 8

6 WASHER, LOCK, SPLIT, 3/8 150925 11

7 CLAMP, HOSE, 5.8 151198 4

8 NUT, 1/2 - 13 HEX 151282 4

9 SCREW, HEX HD, CAP, 5/16 - 18 X 3.4 151369 2

10 WASHER, 1/4 SAE FLAT 151915 12

11 NUT, 3/8 - 16 NYLOK HEX 152505 4

12 SCREW, HEX HD CAP, 3.8 -16 X 1 152507 10

13 WASHER, 1/2 SPLIT LOCK 153524 4

14 SCREW, HEX, 3/8 - 16 X 3.4 153527 1

15 SCREW, 1/2 - 13 X 1 -1/4 HEX HEAD CAP 153532 4

16 SCREW, 1/4 - 20 X 1/2 TRUSS HEAD 153880 10

17 NUT, HEX, TW, 1/4 - 20 153941 2

18 HOSE, 1/4 FUEL, 12” 154163 1

19 HOSE, 1/4 FUEL, 24” 154163 1

20 ELBOW, 1/4 MNPT STREET 154615 1

21 ELBOW, 1/8 MNPT X 1/4 BARB 90DEG 154652 1

22 BELT, AX-42 156110 1

23 GUARD, SHAFT (COMP) 156307 1

24 LIFTING BAIL 156543 1

25 BLADE, MK-799D 16 X 125 X 1 157769 1

26 NUT, HEX, NYLK, 5/16 - 18 158289 1

27 ASSY, BLD GRD 20” 158818 1

28 BELTGUARD (COMP) 159888 1

29 FITTING, PUSH ON HOSE 1/4 X 1/4 MALE 165183 1

30 ASSY, POINTER, CONC SAW 166465 1

31 CAP, 2” FUEL FILLER 167220 1

32 TANK, FUEL, 2.5 GAL 169353 1

33 ASSY, FRAME, LESS ENGINE 169719 1

34 ASSY, ENGINE, GX690 170048 1

35 VALVE, BALL, 1/4”M TO 1/4”F 231248 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 39

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 2 - PARTS LIST: MK-2024HSP CONCRETE SAW - P/N 158777

ITEM

NO.

1 WRENCH, BOX END, 1-1/2 X 9/16 137976 1

2 GRIP, HANDLE, 1/0 ID 150842 2

3 WASHER, FLAT, SAE, 3/8 150923 3

4 WASHER, LOCK, SPLIT, 3.8 150925 1

5 SCREW, HEX HD CAP, 3.8 - 16 X 1 152507 1

6 PULLEY, 1A30 X 1/2 BORE IDLER 153797 1

7 SPRING, 9.16 X 2.5 EXTENSION 153807 1

8 BRACKET, IDLER PULLEY 154244 1

9 WELDENT, HANDLEBAR 156516 1

10 SCREW, HEX HEAD 3.8 - 16 X 1 - 1/2 LG. 156656 2

11 COVER, 8 - 4 AWG TERMINAL, RED 169355 1

12 ASSY, FRAME, LESS ENGINE 169719 1

13 ASSY, ENGINE, GX690 170048 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 40

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 2 - PARTS LIST: MK-2024HSP CONCRETE SAW - P/N 158777

ITEM

NO.

1 NUT, HEX, 1/4 -20 151893 4

2 WASHER, 1/4 SAE FLAT 151915 12

3 NUT, 3/8 -16 NYLOK HEX 152505 4

4 SCREW, HEX HD CAP, 1/4 - 20 X 1 152676 2

5 CABLE, 4GA X 48 RED BATTERY 153848 1

6 CABLE, 4GA X 24 BLACK BATTERY 153849 1

7 TACHOMETER/HOURMETER 153877 1

8 SCREW, 1/4 -20 X 1/2 TRUSS HEAD 153880 10

9 ASSY, TROTTLE CONTROL 155406 1

10 NUT, 10 -24 CLIP 155407 2

11 PANEL, TOWER LOWER BACK 156505 1

12 PLUG, HOLE PLASTIC 3/4” 156615 2

13 NUT, 3/8 - 24 HEX JAM 156623 1

14 SCREW, PAN HD SELF TAP 8 - 32 X 1/2 156632 2

15 BOX, BATTERY 156634 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 41

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 2 - PARTS LIST: MK-2024HSP CONCRETE SAW - P/N 158777

ITEM

NO.

16 SCREW, BTN HD 3/8 16 X 3/4 SOCK 156635 2

17 SCREW, PAN HD PHIL MS 10 24 X 3/4 156641 2

18 TAG, SERIAL #, BLANK 157500-RW 1

19 DRIVE SCREW, #7 X 5/16 ROUND HEAD 157849 2

20 STRAP, NYLON, 1” 158094 1

21 CABEL, CHOKE, HONDA (COMP) 158816 1

22 BATTERY, 12V, 35AH 162589 1

23 COVER, 1” BATTERY TERMINAL, RED 163940 1

24 TAPE, VHB, 5952 (3.0”) 166487 1

25 BRACKET, SWITCH 169714 1

26 WIRING HARNESS, GX630/690 169715 1

27 ASSY, FRAME, LESS ENGINE 169719 1

28 TAG, EVAP, 20S, PARENT 169736-20S 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 42

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 3 - PARTS LIST: FRAME, LESS ENGINE - P/N 169719

ITEM

NO.

1 WHEEL, REAR CONCRETE SAW 138529 2

2 WASHER, 1/2 SAE FLAT 150924 4

3 WASHER, 7/16 SPLIT LOCK 151051 5

4 SCREW, 5/16 - 18 X 1/2 SOCKET HEAD SET 152607 2

5 WASHER, FLAT, SAE, 3/4 153523 4

6 COLLAR, SET, 3/4” 153814 2

7 AXLE, REAR, Ø 3/4 153873 2

8 SCREW, 7/16 - 14 X 1 - 1/2 HEX HEAD CAP 155155 4

9 ASSY, THROTTLE CONTROL 155406 1

10 ASSY, PIN CLEVIS 3/8 X 1 - /14 156611 1

11 BLADE SHAFT 20HP 156654 1

12 FRAME, WELDMENT 157092 1

13 ASSY, TRUCK 169710 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 43

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 3 - PARTS LIST: FRAME, LESS ENGINE - P/N 169719

ITEM

NO.

1 WASHER, FLAT, SAE, 3/8 150923 13

2 WASHER, 1/2 SAE FLAT 150924 2

3 WASHER, LOCK, SPLIT, 3/8 150925 4

4 SCREW, PAN HD SELF TP10-24 X 3/8 151262 2

5 NUT, HEX, 1/4 - 20 151893 6

6 SCREW, HEX HEAD 1/4 - 20 X 1 - 1/2” 151914 1

7 NUT, 3/8 - 16 NYLOK HEX 152505 6

8 SCREW, HEX HD, 3/8 - 16 X 2 153485 2

9 SCREW, HEX, 3/8 - 16 X 3/4 153527 4

10 SCREW, 1/2 - 13 X 1 - 1/4 HEX HEAD CAP 153532 2

11 SCREW, 1/4 - 20 X 1/2 TRUSS HEAD 153880 10

12 EYEBLT, 1/4 - 20 X 2 153887 1

13 ASSY, WATER VALVE 153888 1

14 SPRING, EXTENSION 153957 1

15 LINKAGE, DPTH FEED 1600/9000 155049 1

16 PANEL, RIGHT, 20 SERIES 156500 1

17 PANEL, LEFT, 20 SERIES 156501 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 44

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 3 - PARTS LIST: FRAME, LESS ENGINE - P/N 169719

ITEM

NO.

18 PANEL, UPPER BACK TOWER 156504 1

19 ASSY, PIN CLEVIS 3/8 X 1 - 1/4 156611 1

20 PLUG, 1/2 FLUSH HEAD BUTTON 156779 1

21 FRAME, WELDMENT 157092 1

22 ASSY, TRANSMISSION 169711 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 45

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 3 - PARTS LIST: FRAME, LESS ENGINE - P/N 169719

ITEM

NO.

1 WASHER, FLAT, SAE, 3/8 150923 9

2 SCREW, HEX HD, 5/16 - 18 X 1 151743 1

3 WASHER, FLAT, SAE, 5/16 151754 1

4 NUT, HEX, 1/4 - 20 151893 1

5 WASHER, 1/4 SAE FLAT 151915 2

6 NUT, 3/8 -16 NYLOK HEX 152505 5

7 SCREW, HEX HD CAP, 3.8 - 16 X 2 153485 2

8 SCREW, RND HD, #8 - 32 X 1/2 152517 1

9 WASHER, 1/4 SPLIT LOCK 152951 2

10 SCREW, HEX HD, 3/8 - 16 X 1 152507 2

11 SCREW, 3/8 -16 X 1-1/2 HEX HEAD 153528 1

12 NUT, HEX, 8 -32 153549 1

13 SCREW, SOC HD, CAP, 3.8 - 16 X2 153643 1

14 SCREW, FLAT HD, SOC, 1/4 -20 X 1” 153894 1

15 ARM, DRIVE ADJUSTMENT 154242 2

16 KNOB, 1/2 - 20 SSFEM BALL 154486 1

17 LINKAGE, DEPTH FEED 1600/9000 1550449 1

18 STUD, 3/4 - 10 X 10” 155062 1

19 NUT, 3/4 - 10 HEX 155063 2

20 ASSY, THROTTLE CONTROL 155406 1

21 NUT, 10 -24 CLIP 155407 2

22 SCREW, PAN HD, CAP, 14 - 20 X 1/2 155452 2

23 WASHER, FLAT, SAE, #8 155454 2

24 ASSY, CRANK WHEEL, 3/4 - 10 155457 1

25 SCREW, SOCKET HEAD CAP 3.8 - 16 X 1 156602 1

26 CLAMP, DEPTH INDICATOR 156603 1

27 ARM, DEPTH INDICATOR 156604 1

28 SPRING, DEPTH GAUGE 156605 1

29 SPOOL, 2.75 DIA DEPTH INDICATOR 156606 1

30 SCREW, HEX HD, CAP, 1/4 - 20 X 2 - 1/4 156607 1

31 BRACKET, DEPTH INDICATOR 156608 1

32 SPRING, DETENT 156609 1

33 HANDLE, ENGAGE 156610 1

34 ASSY, PIN CLEVIS 3.8 X 1 - 1/4 156611 1

35 SCREW, PAN HD PHIL MS 10 - 24 X 3/4 156641 2

36 LABEL, CONTROL PANEL 165136 1

37 BEARING, FLANGE, 3/4 ID, FD204 165971 1

38 CASING, CONTROL PANEL - COMP 169712 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 46

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 4 - PARTS LIST: BLADE SHAFT - P/N 156654

ITEM

NO.

1 NUT, 1 - 14 RIGHT HAND 138693 1

2 NUT, 1 - 14 LEFT HAND 138701 1

3 FLANGE, INNER 150731 2

4 KEY, 3/16 X 3/4 WOODRUFF 150794 2

5 KEY, SQUARE, 1/4 X 1 - 3/4 150796 1

6 PULLEY, 2A34B38 X 1610 TB 150010 1

7 BUSHING, TPR-LOCK 1610X1 - 3/16” 155011 1

8 ASSY, OUTER FLANGE, 4” 155451 1

9 BEARING, 1 - 3/16 ID PILLOW BLOCK 155622 2

10 SHAFT, 1 3/16 BLADE 156599 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 47

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 5 - PARTS LIST: ENGINE, HONDA GX630 - P/N 169713

ITEM

NO.

1 KEY, SQUARE, 1/4 X 1 - 3/4 150796 1

2 WASHER, FLAT, SAE, 3/8 150923 8

3 WASHER, 1/2 SAE FLAT 150924 3

4 WASHER, LOCK, SPLIT, 5/16 151747 4

5 WASHER, FLAT, SAE, 5/16 151754 4

6 NUT, 3/8 - 16 NYLOK HEX 152505 4

7 SCREW, HEX HD, 3/8 - 16 X 2 153485 4

8 WASHER, 1/2 SPLIT LOCK 153524 2

9 SCREW, 1/2 - 13 X 1 - 1/4 HEX HEAD CAP 153532 4

10 BOLT, HEX, TAP, 1/2 - 13 X 4 153854 1

11 MOUNT, ENGINE 154237 1

12 BUSHING, TPR - LOCK 1210 X 1 - 1/8” 154430 1

13 ELBOW, 1/8 MNPT X 1/4 BARB 90DEG 154652 1

14 PULLEY, 3A30B34 X 1210TB REV 155009 1

15 ASSY, OIL DRAIN, 14MM 157577-03 1

16 GUARD, INNER BELT 165608 1

17 SCREW, 5/16 - 24 X 3/4 HEX HEAD MACHINE 165617 4

18 ENGINE, HONDA GX630 169592 1

19 ASSY, 7” AIR CLEANER 165593 1

20 MUFFLER, HONDA 20HP 621600 169594 1

21 WASHER, 1/2 SAE FLAT 169958 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 48

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 6 - PARTS LIST: ENGINE, HONDA GX690 - P/N 170048

ITEM

NO.

1 KEY, SQUARE, 1/4 X 1 - 3/4 150796 1

2 WASHER, FLAT, SAE, 3/8 150923 8

3 WASHER, 1/2 SAE FLAT 150924 3

4 WASHER, LOCK, SPLIT, 5/16 151747 4

5 WASHER, FLAT, SAE, 5/16 151754 4

6 NUT, 3/8 - 16 NYLOK HEX 152505 4

7 SCREW, HEX HD, 3/8 - 16 X 2 153485 4

8 WASHER, 1/2 SPLIT LOCK 153524 2

9 SCREW, 1/2 - 13 X 1 - 1/4 HEX HEAD CAP 153532 4

10 BOLT, HEX, TAP, 1/2 - 13 X 4 153854 1

11 MOUNT, ENGINE 154237 1

12 BUSHING, TPR - LOCK 1210 X 1 - 1/8” 154430 1

13 ELBOW, 1/8 MNPT X 1/4 BARB 90DEG 154652 1

14 PULLEY, 3A30B34 X 1210TB REV 155009 1

15 ASSY, OIL DRAIN, 14MM 157577-03 1

16 GUARD, INNER BELT 165608 1

17 SCREW, 5/16 - 24 X 3/4 HEX HEAD MACHINE 165617 4

18 ASSY, 7” AIR CLEANER 169593 1

19 MUFFLER, HONDA 20HP 621600 169594 1

20 ENGINE, HONDA GX690 169716 1

21 WASHER, 1/2 SAE FLAT 169958 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 49

MK-20 SERIES EXPLODED VIEW & PARTS LIST

FIGURE 7 - PARTS LIST: ASSY, POINTER - P/N 166465

ITEM

NO.

1 SCREW, THUMB 1/4 - 20 X 3/4 150991 1

2 WHEEL, POINTER, 3” 155066 1

3 BUSHING, 3/8ID X 1 - 5/8L 155153 1

4 POINTER ARM, CONC SAW 156544 1

5 ASSY, POINTER WHEEL 165238 1

DESCRIPTION

PART OR

IDENTIFYING NO.

QTY.

REQ.

Page 50

MK-20 Series ORDERING & RETURN

ORDERING INFORMATION

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: There is a $25.00 minimum order when ordering direct from MK Diamond. A $6.00 charge will be added to orders having a net billing value under $50.00. All purchases must be made using VISA, MasterCard or American Express.

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 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. For technical questions, call – 800 474-5594 or 310 257-2845.

PACKAGING INSTRUCTIONS

• Remove the Cutting Head and Support Angle Assembly

• Dry the saw before shipping

• When packing, include the following: Saw, Diamond Blade, and Blade Guard 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.

Page 51

MK-20 Series 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.

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 respective 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 specications included in this publication were in effect at the time of approval for printing.

Page 52

MK-20 SERIES CONCRETE SAW

OWNER’S MANUAL, OPERATING INSTRUCTIONS, &

PARTS LIST

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