MK Diamond Products MK-20 SERIES User manual

05.2013
MK-20 SERIES
OWNER’S MANUAL,
OPERATING INSTRUCTIONS
& PARTS LIST
www.mkdiamond.com
Caution: Read all safety and operating instructions
before using this equipment. This owner’s manual
MUST accompany the equipment at all times.
Revision 304
Manual Part# 156777
Gas Powered
Concrete Saw

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.

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

4
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.
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.
NOTICE
You can cause PROPERTY DAMAGE to your machine if you don’t follow directions.
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.
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.
Before using this saw, ensure that the person operating the equipment has read and understands all
instructions in this manual.
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.

5
MK-20 SERIES SAFETY
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.
In order to prevent injury, keep guards in place and in working order at all times.
KEEP GUARDS IN PLACE
SAFETY PRECAUTIONS
GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS
(
(
)
)
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 equip-
ment is operated speeds above design maximum.
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.
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.

6
MK-20 SERIES SAFETY
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.
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.
ALWAYS USE SAFETY GLASSES
Safety glasses should always be worn when working around power tools. Everyday eye-
glasses 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.
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.
on
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.

7
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 instruc-
tions 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 in-
crease 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.
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 oper-
ate a power tool is safer.
MK-20 SERIES SAFETY
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, mount-
ings 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.

8
MK-20 SERIES SAFETY
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).
WARNING
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, 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 collec-
tion, use an industrial vacuum cleaner.
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.
ON
(
(
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9
OPERATION & SAFETY DECALS
DO NOT operate
this equipment
before reading
the owners’
manual!
WARNING
!
(A)
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.
!
(B)
CAUTION
DO NOT
operate without
guards in place.
!
(C)
(3 of them)
WARNING
In the event of
blade failure,
replace blade
guard
immediately.
!
(D)
DANGER
The exhaust from this product
contains chemicals known to
the State of California to cause
cancer, birth defects or other
reproductive harm.
!
(E)
DANGER
Lethal exhaust
gases. Use only
in well ventilated
areas. DO NOT
use indoors.
(F)
WARNING
When refueling
stop engine and
allow to cool.
DO NOT overfill
tank.
!
(G)
CAUTION
DO NOT
touch hot
surface.
!
(H)
CAUTION
Accidental start hazard.
Disconnect spark plug
prior to servicing.
!
(I)
SERVICE OR
WARRANTY
FORINFORMATIONON
PLEASE CALL
1-800-474-5594
(J)
(K)
CAUTION
Keep
hands and
feet clear.
!
(L)
(M)
WARNING
Handle bar NOT a lifting point.
!
NOTICE
Overtensioning of belts
will result in premature
crank and/or bearing failure.
!
Concrete Saw Warning Label
Sheet Part# 166009
Location Description
AFrame Read Manual
BFrame Proposition 65, Dust Warning
CShaft Cover & Belt Guard Guards in Place
DBlade Guard Replace Blade Guard
EGas Tank/Top Exhaust/Cancer
FGas Tank/Top Lethal Exhaust
GGas Tank/Top Refueling
HGas Tank Hot Surface
I Blade Guard Accidental Start
JFrame/Back Service (Not Shown)
KFrame/Front Hand & Feet Clear
LHandle Lifting Point
MBelt Guard Overtensioning Belts
NConsole Machinery Hazard
MK-20 SERIES SAFETY
H
GFA
L
N
E
I
MC
C
B
D
C
K
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 [phone].
(N)

10
MK-20 SERIES PRODUCT SPECIFICATION
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.
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.
Model MK2013HSP MK-2013SE MK-2013SSP MK-2013VSP
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 MK2014K MK-2020HSP MK-2024HSP MK-2022SSP
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
Motor and Weight Specications
Motor and Weight specications for the MK-20 Series are listed below.