MK Diamond Products MK-370EXP TILE SAW User manual

04.2009
MK-370EXP 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 owners manual MUST accompany
the equipment at all times.
Revision 301
Manual Part No. 160084

2
Congratulations on your purchase of a MK-370EXP 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-370EXP 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-370EXP safely and correctly. Please take a few minutes to familiarize yourself with
the MK-370EXP by reading and reviewing this manual.
If you should have questions concerning your MK-370EXP, please feel free to call our friendly customer
service department at: 800 421-5830
Regards,
MK Diamond
MK-370EXP NOTES
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.

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MK-370EXP TABLE OF CONTENTS
MK-370EXP PAGE
NO.
SAFETY
Safety Message/Alert Symbols,Warnings 4-6
Hazard Symbols 7
Electric Motor Safety 8-10
Operation & Safety Decals 11
PRODUCT SPECIFICATIONS
Specications 12
SET-UP
Unpacking,Transport, Stand, & Assembly 13-20
Adjustment & Operation 21-25
Cleanup 26-27
Maintenance & Troubleshooting 28-40
EXPLODED VIEW AND PART LIST
Exploded View Saw 42
Parts List 43
Exploded View Table 44
Parts List 45
THEORY
Theory of Diamond Blades 46
ACCESSORIES
Accessories List 47
ORDERING & RETURN INSTRUCTIONS
Ordering & Return Information 48

4
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
MK-370EXP SAFETY

5
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.
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 EXTENSION 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
MK-370EXP SAFETY

6
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.
MK-370EXP SAFETY

7
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
DO NOT expose to rain or use in damp locations.
WARNING
ROTATING PARTS
ELECTRICAL SHOCK
OVER SPEED
DO NOT EXPOSE TO RAIN
MK-370EXP SAFETY

8
ELECTRICAL REQUIREMENTS AND GROUNDING INSTRUCTIONS
MK-370EXP SAFETY
In order to prevent potential electrical shock and injury, the following electrical safety precautions and sym-
bols 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.
WARNING
• Do not modify the plug provided – if it will not t the outlet; have the proper outlet installed by a
qualied 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 qualied 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
WARNING
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 tempo-
rary 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 qualied 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.
'ROUNDING
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Fig. 1 Circuit and Adapter Information

9
Supporting
Surface
Power
Tool
Drip Loop
Power
Cord
Fig. 2 Drip Loop Information
To avoid the possibility of the appliance plug or receptacle getting wet, position the machine 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.
WARNING
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.
WARNING

10
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.
Table 1
WARNING
WARNING
MK-370EXP SAFETY
EXTENSION CORD MINIMUM GAGE FOR LENGTH
VOLTS TOTAL LENGTH OF CORD IN FEET
25 ft.
AWG
50 ft.
AWG
100 ft.
AWG
150 ft.
AWG
115v 14 12 Not Recommended Not Recommended
230v N/A 14 12 N/A