MK Diamond Products MK-370 EXP System manual

11.2008
MK-370 EXP TILE SAW
OWNERS MANUAL &
OPERATING INSTRUCTIONS
www.mkdiamond.com
MK Diamond Products, Inc.
Caution: Read all safety and operating instructions before
using this equipment.This parts list MUST accompany the
equipment at all times.
Revision 201

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SAFETY INSTRUCTIONS FOR THE MK-370 EXP TILE SAW
Congratulations on your purchase of a MK-370 EXP Tile Saw. 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-370 EXP 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-370
EXP safely and correctly. Please take a few minutes to familiarize yourself with the MK-370 EXP by reading and
reviewing this manual.
If you should have questions concerning your MK-370 EXP, please feel free to call our friendly customer service
department at: 800 421-5830
Regards,
MK Diamond

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TABLE OF CONTENTS
SAFETY
DAMAGE PREVENTION AND INFORMATION MESSAGES:_______________ 4
SAFETY MESSAGES _____________________________________________ 4
GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS ____________ 4
CALIFORNIA PROPOSITION 65 MESSAGE ___________________________ 6
ELECTRICAL REQUIREMENTS AND GROUNDING INSTRUCTIONS _______ 8
TILE SAW SPECIFIC WARNINGS:__________________________________ 10
SAFETY LABEL LOCATIONS ______________________________________ 10
PRODUCT SPECIFICATIONS _____________________________________ 11
UNPACKING, TRANSPORT, STAND and ASSEMBLY
UNPACKING ___________________________________________________ 12
CONTENTS ____________________________________________________ 12
TRANSPORT___________________________________________________ 12
TILE SAW STAND _______________________________________________ 13
ASSEMBLY ____________________________________________________ 14
SETUP, ADJUSTMENT & OPERATION
SETUP________________________________________________________ 17
ADJUSTMENT & OPERATION _____________________________________ 20
CLEANUP _____________________________________________________ 25
MAINTENANCE AND TROUBLESHOOTING
MAINTENANCE_________________________________________________ 27
ALIGNMENT ___________________________________________________ 32
TROUBLESHOOTING____________________________________________ 37
EXPLODED VIEW AND PARTS LIST
EXPLODED VIEW _______________________________________________ 40
PARTS LIST ___________________________________________________ 41
THEORY
THEORY OF DIAMOND BLADES___________________________________ 43
ACCESSORIES
ACCESSORIES_________________________________________________ 44
ORDERING & RETURN INSTRUCTIONS
ORDERING INFORMATION _______________________________________ 45
RETURN MATERIALS POLICY ____________________________________ 45
PACKAGING INSTRUCTIONS _____________________________________ 45
AUTHORIZED SERVICE CENTERS_________________________________ 45

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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 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.
DAMAGE PREVENTION AND INFORMATION MESSAGES:
NOTE: Equipment and/or property damage may result if these instructions are not followed.
In order to prevent injury, the following safety precautions and symbols should be followed at all times!
GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS:
Safety Precautions:
Form a habit of checking to see that keys and adjusting wrenches are removed from the power tool
before it is turned on.
Cluttered work areas and benches invite accidents.
DO NOT use power tools in damp or wet locations nor expose them to rain. Always keep the work area
well lighted.
All visitors and children should be kept a safe distance from work area.
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.
ALWAYS read this Owner’s Manual before operating the machine.
ALWAYS keep the Blade Guards in place.
REMOVE ADJUSTING KEYS AND WRENCHES
KEEP WORK AREA CLEAN
KEEP CHILDREN AWAY
DO NOT USE IN DANGEROUS PLACES

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If using an extension cord make sure it is in good condition first. When using an extension cord, be
sure to use one heavy enough to carry the current your product will draw. An undersized cord will cause
a drop in line voltage that will result in a loss of power and overheating. TABLE 1, Page 9 shows the
correct AWG size to use depending on cord length and nameplate ampere rating. If in doubt, use the
next heavier gage. The smaller the gage number, the heavier the cord.
SAFETY
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 covering to contain long hair.
Keep proper footing and balance at all times by not overreaching.
Clamps or a vise should be used to hold work whenever practical. Keeping your hands free to operate
a power tool is safer.
Keep tools clean for the best and safest performance. Always follow maintenance instructions for
lubricating, and when changing accessories.
Power tools should always be disconnected before servicing or when changing accessories, such as
blades, bits, cutters, and the like.
Make the workshops kid proof by using padlocks, master switches or by removing starter keys.
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.
MAKE THE WORKSHOP KID PROOF
DO NOT FORCE THE TOOL
USE THE RIGHT TOOL
USE THE PROPER EXTENTION CORD
USE PROPER APPAREL
ALWAYS wear approved eye protection.
ALWAYS wear approved respiratory protection.
ALWAYS place the power ON/OFF switch in the OFF position when the saw is not in use.
ON / OFF
SECURE WORK
DO NOT OVERREACH
MAINTAIN TOOLS WITH CARE
DISCONNECT TOOLS

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SAFETY
Consult the owner’s manual for recommended accessories. Using improper accessories may increase
the risk of personal or by-stander injury.
Serious injury could occur if a power tool is tipped, or if a cutting tool is unintentionally contacted.
Before using a power tool, check for damaged parts. A guard or any other part that is damaged should
be carefully checked to determine 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 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.
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.
CALIFORNIA PROPOSITION 65 MESSAGE:
USE RECOMMENDED ACCESSORIES
NEVER LEAVE A TOOL UNATTENDED
NEVER STAND ON THE TOOL
CHECK FOR DAMAGED PARTS
DIRECTION OF FEED
WARNING
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 and cement and other masonry products and
• Arsenic and chromium, from chemically treated lumber
For further information, consult the following sources:
http://www.osha.gov/SLTC/silicacrystalline/index.html
http://www.oehha.org/prop65/out_of_date/6022kLstA.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
those dust masks that are specially designed to filter out microscopic particles.

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Sawing and drilling generates 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). 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
Hazard Symbols:
NEVER touch electrical wires or components while the engine is running. They can be sources of
electrical shock which could cause severe injury or burns.
Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never operate the
engine with covers, shrouds, or guards removed.
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.
(
(
)
)
on
SAFETY
DO NOT expose to rain or use in damp locations.
WARNING
ROTATING PARTS
ELECTRICAL SHOCK
OVER SPEED
DO NOT EXPOSE TO RAIN

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ELECTRICAL REQUIREMENTS AND GROUNDING INSTRUCTIONS:
In order to prevent potential electrical shock and injury, the following electrical safety
precautions and symbols should be followed at all times!
In case of a malfunction or breakdown, grounding provides a path of least resistance for electric current
to reduce the risk of electric shock. This tool is equipped with an electric cord having an equipment-
grounding conductor and a grounding plug. The plug must be plugged into a matching outlet that is
properly installed and grounded in accordance with all local codes and ordinances.
• Do not modify the plug provided – if it will not fit the outlet; have the proper outlet installed by a
qualified electrician
• Improper connections of the equipment-grounding conductor can result in a risk of electric shock.
The equipment-grounding conductor is the insulated conductor that has an outer surface that
is green, with or without yellow stripes. If repair or replacement of the electric cord or plug is
necessary, do not connect the equipment-grounding conductor to a live terminal
• Check with a qualified electrician or service personnel if the grounding instructions are not
completely understood, or if in doubt as to whether the tool is properly grounded
• Use only 3-wire extension cords that have 3-prong grounding plugs and 3-pole receptacles that
accept the tool’s plug
• Repair or replace a damaged or worn cord immediately
This tool is intended for use on a circuit that has an outlet that looks like the one shown in Sketch A of
Figure 1. The tool has a grounding plug that looks like the plug illustrated in Sketch A of FIGURE 1. A
temporary adapter, which looks like the adapter illustrated in sketches B and C, may be used to connect
this plug to a 2-pole receptacle as shown in Sketch B, if a
properly grounded outlet is not available. The temporary adapter
should be used only until a properly grounded outlet can be
installed by a qualified electrician. The green-colored rigid ear,
lug, and the like, extending from the adapter, must be connected
to a permanent ground such as a properly grounded outlet box.
NOTE: Use of a temporary adapter is not permitted in Canada
FIGURE 1
To reduce the risk of electrocution, keep all connections dry and off the ground.
A Ground Fault Circuit Interrupter (GFCI) should be provided on the circuit(s) or outlet(s) to be used for
the Saw. Receptacles are available having built-in GFCI protections and may be used for this measure
of safety.
When using an extension cord, the GFCI should be installed closest to the power source, followed by the
extension cord and lastly, the saw.
SAFETY
WARNING
WARNING
WARNING

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To avoid the possibility of the appliance plug or receptacle getting wet, position the saw to one side of a
wall mounted receptacle. This will prevent water from dripping onto the receptacle or plug. A “drip loop,”
shown in FIGURE 2, should be arranged by the user to properly position the power cord relative to the
power source.
The “drip loop” is that part of the cord below the level of the receptacle, or the
connector, if an extension cord is used. This method of positioning the cord prevents
the travel of water along the power cord and coming in contact with the receptacle.
If the plug or receptacle gets wet, DO NOT unplug the cord. Disconnect the fuse or
circuit breaker that supplies power to the tool. Then unplug and examine for presence
of water in the receptacle.
Use of under size extension cords result in low voltage to the motor that can result in motor burnout
and premature failure. MK Diamond warns that equipment returned to us showing signs of being run
in a low voltage condition, through the use of undersized extension cords will be repaired or replaced
totally at the customers expense. There will be no warranty claim.
To choose the proper extension cord,
• Locate the length of extension cord needed in TABLE 1 below.
• Once the proper length is found, move down the column to obtain the correct AWG size required
for that length of extension cord.
To reduce the risk of electrocution, keep all connections dry and off the ground. Do not touch the
plug with wet hands.
Use only extensions cords that are intended for outdoor use. These extension cords are identified
by a marking “Acceptable for use with outdoor appliances; store indoors while not in use.” Use
only extension cords having an electrical rating not less than the rating of the product. Do not use
damaged extension cords. Examine extension cords before using and replace if damaged. Do not
abuse extension cords and do not yank on any cord to disconnect. Keep cords away from heat and
sharp edges. Always disconnect the extension cord from the receptacle before disconnection the
product form the extension cord.
FIGURE 2
Extension Cord Minimum Gage for Length
Volts Total Length of Cord in Feet
120 V 25 ft. 50 ft. 100 ft. 150 ft.
AWG AWG AWG AWG
14 12 Not Recommended
TABLE 1
SAFETY
Drip Loop
WARNING
WARNING
WARNING

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SAFETY LABEL LOCATIONS
Safety labels are located according to Figures 1 through 4 below. The labels contain important safety
information. Please read the information contained on each safety label. These labels are considered a
permanent part of your saw. If a label comes off or becomes hard to read, contact MK Diamond or your dealer
for a replacement
Item Location Description Part No.
1A Motor – Right Side Caution – Receptacle is for Water Pump Only 154822
1B Motor – Right Side Motor Specifications N/A
2 Motor – Left Side Caution – Use with Ground Fault Circuit Interrupter 155678
3A Cutting Head – Top MK-370 EXP Serial Number 157500
3B Cutting Head – Top Warning – Read Owners Manual 155806
4A Pump – Left Side Warning – Connect to Grounded Receptacle N/A
4B Pump – Right Side Pump Specifications N/A
SAFETY
TILE SAW SPECIFIC WARNINGS:
Wear eye protection.
Use splash hood for every operation for which it can be used.
Disconnect saw before servicing, when changing cutting blades, and cleaning.
Replace damaged cutting blade before operating.
1
A B
2
3
A B
4
A B
WARNING