MK Diamond Products 160028 User manual

12.2021
MK-377EXP TILE SAW
OWNER'S MANUAL
& PARTS LIST
www.mkdiamond.com
Caution: Read all safety and operating instructions
before using this equipment. This parts list MUST
accompany the equipment at all times.
Revision 208
Manual Part No. 160030
Part# 160028

2
INTRODUCTION
Congratulations on your purchase of a MK-377EXP Saw. 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-377EXP Saw 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-377EXP Saw safely and correctly. Please take the time to famil-
iarize yourself with the MK-377EXP Saw by reading and reviewing this manual.
Read and follow all safety, operating and maintenance instructions.
If you should have questions concerning your MK-377EXP Saw, please feel free to call our
friendly customer service department at: 800 421-5830
Regards,
MK Diamond
NOTE THIS INFORMATION FOR FUTURE USE:
MODEL NUMBER:
SERIAL NUMBER:
PURCHASE PLACE:
PURCHASE DATE:
WARRANTY: For your (1) one year warranty to be effective, complete the online Product
Registration as soon as possible. Visit www.mkdiamond.com/registration/

3
TABLE OF CONTENTS
SAFETY
Safety Messages 4
Damage Prevention Message 4
General Safety Precautions 4-7
California Proposition 65 Message 8
Electrical Requirements and Grounding Instructions 9
Electric Motor Safety 10-12
Safety Label Locations 13
Product Specications 14
UNPACKING, TRANSPORT
Unpacking 15
Contents 15
Transport 15
STARTUP, ADJUSTMENT, OPERATION and SHUTDOWN
Cutting Head Installation 16
Diamond Blade Installation 16-17
Adjustable Cutting Guide Installation 18
Splash Guard Installation 18
Pre-Start Inspection 18
Water Pump Preparation 19
Setup for Operation 20
Adjustment & Operation 21
Cleanup 22-23
Lockout 23
MAINTENANCE AND TROUBLESHOOTING
Maintenance 23-24
Blade Dressing 24
Motor Brush Change Out 25
Troubleshooting 26-28
EXPLODED VIEW AND PARTS LIST
Exploded View & Parts List 30-33
ACCESSORIES ORDERING and RETURN INSTRUCTIONS
Accessories 34
Ordering Information 36
Return Material Policy 36
Packaging Instructions 36
Authorized Service Centers 36
Contact & Warranty 37

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MK-377EXP SAW SAFETY
Read and follow all safety, operating and maintenance instructions. Failure to read and follow
these instructions could result in injury or death to you or others. Failure to read and follow these
instructions could also result in damage and/or reduced equipment life. Safety warnings and
guidelines do not by themselves eliminate danger. They are not substitutes for proper accident
prevention procedures and good judgement.
SAFETY MESSAGES
A 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.
GENERAL SAFETY PRECAUTIONS AND HAZARD 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.
ALWAYS read this Owner’s Manual before operating the machine. DO NOT operate or
service this equipment before reading this entire manual. Read and understand all warn-
ings, instructions and controls on the machine. Know how to stop the equipment quickly in
case of emergency. It is the operators responsibility to use this machine under safe work-
ing conditions and conform with federal, state and local codes or regulations pertaining to
safety, air, pollution, noise etc...
ALWAYS keep the Blade and Belt Guards in place. DO NOT operate this machine with any
guard or safety device removed. A Guard, or any damaged part should be repaired or
replaced immediately.
NEVER operate this equipment without proper protective clothing, shatterproof
glasses, steel-toed boots and other protective devices required by the job. Non-slip
foot wear is recommended.
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In order to prevent injury, the following safety precautions and symbols should be followed at all times!

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MK-377EXP SAW SAFETY
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All visitors and children should be kept a safe distance from work area. Maintain a safe
operating distance to other personnel.
KEEP CHILDREN AWAY
MAKE THE WORKSHOP KID PROOF
Make the workshops kid proof by using padlocks, master switches or by removing starter keys.
ROTATING PARTS
Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never oper-
ate the motor with covers, shrouds, or guards, removed.
OVER SPEED
NEVER tamper with the governor components or settings to increase the maximum speed.
Severe personal injury and damage to the engine or equipment can result if operated at
speeds above maximum.
ELECTRICAL SHOCK
NEVER touch electrical wires or components while the engine is running. Exposed, frayed or
worn electrical wiring and plugs can be sources of electrical shock which could cause severe
injury or burns. Do not touch the plug with wet hands.
ALWAYS avoid inhalation of and skin contact with silica dust and/or mist. Provide proper
dust removal. Use dust-collection system when applicable.
NEVER operate the machine in an explosive atmosphere or near combustible materials.
Sparks from the cutting-action of this machine can ignite flammable materials, liquids, gases
or dust.
This equipment should not be operated by persons under 18 years of age.
ALWAYS wear approved respiratory, head, ear and eye protection
when operating this machine.
Before starting the engine/motor, be sure the ON/OFF switch is in the OFF position to pre-
vent accidental starting. Place the ON/OFF switch in the OFF position before performing any
service operation. ALWAYS place the power ON/OFF switch in the OFF position when the
machine is not in use.
ACCIDENTAL STARTS!
PERSONAL PROTECTIVE EQUIPMENT
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.
HOT PARTS!
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DO NOT FORCE THE TOOL
A power tool will do a job better and safer operating at the rate for which it was designed.
DO NOT force a tool or an attachment to do a job that it was not designed to do.
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6
MK-377EXP SAW SAFETY
Consult the owner’s manual for recommended accessories. Using improper accessories
may increase the risk of personal or by-stander injury. Unauthorized equipment
modifications will void all warranties. Manufacturer does not assume responsibility for any
accident due to equipment modifications.
ALWAYS ensure that the machine is on level ground before using.
Serious injury could occur if a power tool is tipped, or if a cutting tool is unintentionally
contacted.
When loading or unloading the machine, use caution. Remove the blade prior to hoisting,
loading and transporting the machine.
USE RECOMMENDED ACCESSORIES
NEVER STAND ON THE TOOL
TRANSPORT
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. Keep area around machine clear of
obstructions which could cause persons to fall.
DO NOT operate equipment in dangerous or hazardous environments. DO NOT use power
tools in damp or wet locations nor expose them to rain. Always keep the work area well
lighted.
REMOVE ADJUSTING KEYS AND WRENCHES
KEEP WORK AREA CLEAN
DO NOT USE IN DANGEROUS PLACES
MAINTAIN TOOLS WITH CARE
Keep tools clean and maintained for the best and safest performance. Always follow
maintenance instructions and examine the machine before use. If any abnormal vibrations
or noises occurs, turn off machine immediately and have the problem corrected before
further use.
DISCONNECT TOOLS
Power tools should always be disconnected before servicing, adjusting or when changing
accessories, such as blades, bits, cutters, and the like.
DO NOT OVERREACH
Keep proper footing and balance at all times by not overreaching.
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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.
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USE PROPER APPAREL
DO NOT wear loose clothing, gloves, neckties, rings, bracelets, or other jewelry that may
be caught in moving parts. Non-slip footwear is recommended. Wear protective hair cover-
ing to contain long hair.
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MK-377EXP SAW SAFETY
Before using a power tool, check for damaged parts. A guard or any other part that is
damaged should be carefully checked to determine if it would operate properly and
perform its intended function. Always check moving parts for proper alignment or binding.
Check for broken parts and mountings and all other conditions that may affect the
operation of the power tool. A guard, or any damaged part, should be properly repaired or
replaced. Always check the machine for loose bolts before starting.
A blade or cutter should always be installed so that rotation is in the direction of the
arrow imprinted on the side of the blade or cutter. It should correspond with the rotational
direction of the motor. Always feed work into a blade against the direction of rotation.
TURN POWER OFF - Do not leave a tool until it comes to a complete stop. ALWAYS
turn a power tool OFF when leaving the work area, or, when a cut is finished.
NEVER LEAVE A TOOL UNATTENDED
CHECK FOR DAMAGED PARTS
DIRECTION OF ROTATION
NEVER disconnect any "emergency or safety devices". These devices are intended for
operator safety. Disconnection of these devices can cause severe injury, bodily harm, or
even death! Disconnection of any of these devices will void all warranties. Unauthorized
equipment modifications will void all warranties. Manufacturer does not assume
responsibility for any accident due to equipment modifications.
NEVER operate this equipment under the influence of drugs or alcohol.
NEVER operate this equipment when not feeling well due to fatigue, illness or taking medicine.
NEVER use this machine with any cutter designed for woodworking.
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On belt driven equipment, overtensioning of belts will result in premature crank and/or bearing
failure.
Whenever necessary, replace nameplate, operation and safety decals when they become
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
DO NOT lend or rent this equipment without including the Owner's Manual and the Engine/
Motor Manufacturer's Manual.
Check the chemical properties of the material to be cut/grinded and follow all EPA/OSHA
Regulations. (cut/ground)

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MK-377EXP SAW SAFETY
CALIFORNIA PROPOSITION 65 MESSAGE
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.
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities con-
tain chemicals known (to the State of California) to cause cancer, birth defects or other reproductive
harm. Some examples of these chemicals are:
•Lead, from lead-based paints
•Crystalline silica, from bricks and cement and other masonry products
•Arsenic and chromium, from chemically treated lumber
For further information, consult the following sources:
http://www.osha.gov/dsg/topics/silicacrystalline/index.html
http://www.cdc.gov/niosh/docs/96-112/
http://oehha.ca.gov/prop65/law/P65law72003.html
http://www.dir.ca.gov/Title8/sub4.html
http://www.P65warnings.ca.gov
Your risk from these exposures varies depending on how often you do this type of work. To reduce
your exposure to these chemicals, work in a well-ventilated area, and work with approved safety
equipment, such as dust masks that are specially designed to 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 HEPA vacuum cleaner. Observe OSHA 29 CFR part 1926.57 and 1926.103.

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MK-377EXP SAW SAFETY
WARNING
In order to prevent electrical shock and injury, the following electrical safety precautions and symbols
should be followed at all times!
If permanently connected this tool should be connected to a grounded metal permanent
wiring system; or to a system having an equipment - grounding conductor.
In case of a malfunction or breakdown, grounding provides a path of least resistance for electrical
current to reduce the risk of electric shock. This tool is equipped with an electric cord which has 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 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.
This tool is intended for use on a circuit that has an outlet that looks like the one shown in Sketch A.
The tool has a grounding plug that looks like the plug illustrated in Sketch A. 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 qualied electri-
cian. The green-colored rigid ear, plug, and the like, extending from the adapter, must be connected
to a permanent ground, such as a properly grounded outlet box.
ELECTRICAL REQUIREMENTS AND GROUNDING INSTRUCTIONS
NOTE:
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Grounding
Means
(A)
Metal Screw
Cover of
Grounded
Outlet Box
(D)
ADAPTER
(C) Grounding
Pin
Grounding
Pin (B)
Circuit and Adapter Information
Use of a temporary adapter is not permitted in Canada.NOTE:

10
MK-377EXP SAW SAFETY
WARNING
WARNING
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 this
machine. Receptacles are available having built-in GFCI protections and may be used for this
measure of safety. When using an extension cord, GFCI should be installed closest to the power
source, followed by the extension cord and lastly, the machine.
The water pump requires a GFCI. To reduce risk of electrical shock when operating the machine
with the pump plugged into the 3-pole receptacle on the motor, connect the machine to a GFCI
outlet. See the pump manual and informational tags enclosed separately for all pump information.
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CAUTION
DO NOT EXPOSE TO RAIN
For maintenance care and operation of the electric motor, refer to your electric motor instruction book-
let furnished with the electric motor. Protect the electric motor from dust as much as possible and keep
ventilating openings clean. Before plugging in the machine, make sure that the outlet voltage is within
the voltage marked on the machines's data plate.
DO NOT spray water on the electric motor. DO NOT touch the plug with wet hands. To reduce
the risk of electrocution, keep all connections dry and off the ground.
ELECTRIC MOTOR SAFETY
DO NOT operate electric motor in an explosive environment.
DO NOT expose to rain or use in damp locations.
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WARNING
If operating the equipment in damp locations is unavoidable, ALWAYS use a Ground Fault
Circuit Interrupter, ALWAYS wear rubber gloves and footwear in damp conditions.
DO NOT abuse the cord. Never use the cord to carry the equipment or to pull the plug from
the outlet. Keep the cord away from heat, sharp edges, and moving parts. Replace dam-
aged cords immediately. Damaged cords increase the risk of electric shock.
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11
MK-377EXP SAW SAFETY
To avoid the possibility of the appliance or plug receptacle getting wet, position the machine to one
side of a wall mounted receptacle. This will prevent water from dripping into the receptacle or plug. A
"drip loop," shown in the picture below, should be arranged by the user to properly position the power
cord relative to the power source. Use the drip loop as a way to prevent GFCI and plug from getting
wet.
The "drip loop" is that part of the cord below the level of the receptacle (or the connector, if an exten-
sion 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.
Supporting
Surface
Power
Tool
Drip Loop
Power
Cord
Drip Loop Information
WARNING
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WARNING
Use only extension cords that are intended for outdoor use. These extension cords are
identied 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 dis-
connect. Keep cords away from heat and sharp edges. Always disconnect the extension cord
from the receptacle before disconnecting the product from the extension cord.
ALWAYS make certain that the power source required for the electric motor is correct and always
use the correct NEMA conguration plug. Motors can burn out when the line voltage falls 10% below
the voltage rating of the motor. Failure to use proper voltage will cause the motor to overheat. Make
certain that the correct size grounded (3-wires) extension cord is used.
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WARNING
Use of undersized 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 customer’s expense. There will be no warranty claim.
To choose the proper extension cord,
• Locate the length of extension cord needed in the table below.
• Once the proper length is found obtain the correct AWG size required
for that length of extension cord.
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MK-377EXP SAW SAFETY
MOTOR SPECS EXTENSION CORD LENGTH
Motor Voltage Amps 25' 50' 100' 200'
157226-G 120V 1 Ph 5 18 ga 14 ga 12 ga 8 ga

13
SAFETY LABEL LOCATIONS
Safety 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.
MK-377EXP SAW SAFETY LABELS
Decal/Label Location Description
ATray - Front Warning - Dust Control
BMotor - Top Warning - Read and Follow Operating Instructions
CMotor - Top Caution - Receptacle for water pump
DMotor - Top Caution - Use with GFCI only
E
F
Motor - Front
Motor - Front
QR Codes for Manuals and Safety
Warning - Silica Prop 65
• This Equipment may produce Dust
or Mists containing Crystalline Silica.
• Employ Dust Controls and Protection
per OSHA/NIOSH/MSHA.
WARNING
!
Label #164202
Part # 164202
• For Your Own Safety Read Instruction
Manual Before Operating Saw.
• Wear Eye Protection.
• Disconnect Saw Before Servicing, when Changing
Cutting Wheels and Cleaning.
• Use Tool Only with Smooth Edge Cutting Wheels
Free of Openings and Grooves.
• Replace Damaged Cutting Wheel Before Operating.
• Do Not Fill Water Bath Above Water Fill Line.
• See Manual for Pump Replacement.
!
WARNING
Label #155806
Part # 155806
Part # 154822
Receptacle is for water
pump only.
125V .6 amps max.
!CAUTION
Label #154822
Part # 155678
!CAUTION
This saw is to be used
with a Ground Fault
Circuit Interrupter.
Label #155678
Part # 170480
Scan for safety informationScan for manuals
Label #170480
!
WARNING: Crystalline Silica
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
Part # 172640
A
C
E
B
D
F

14
PRODUCT SPECIFICATIONS
The MK-377EXP is a versatile Tile Saw. Operated and used according to this manual, the
MK-377EXP will provide years of dependable service.
General Description
Motor Specifications
Blade Capacity
Tile Types
The MK-377EXP Tile Saw is engineered as a tabletop wet tile saw. The saw includes a powerful
120V electric motor. The saw is capable of cutting tile up to eighteen (18) inches in length. The
saw can cut an object two (2) inches thick in one pass.
Motor specifications for the MK-377EXP are listed in the table below.
Voltage 120v
Motor Amperage 5
Frequency 50/60Hz
RPM 5500 rpm
Horse Power 1/2 hp
The MK-377EXP uses a seven (7) inch (178mm) diameter, wet cutting continuous rim, MK Diamond
blade with a five-eighths (5/8) inch (15.875 mm) arbor.
The MK-377EXP can cut a variety of tile types including stone, ceramic, slate, granite, marble,
porcelain, and lapidary products.
NOTE: The MK-377EXP is not designed to cut plastic or metals.
MK-377EXP SAW PRODUCT SPECIFICATIONS
TILE SAW SPECIFIC WARNINGS
Wear eye protection.
Use splash guard 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.
WARNING

15
The MK-377EXP is designed with a rigid frame and removable Cutting Head making the saw
easily transportable. To lift the saw, grasp the front and back of the frame at the lift points shown
below.
Cutting
Head
Name
address
City
state zip Code
phoNe Fax
e-mail
produCt model
part NumBer
maChiNe serial#
MK DiaMonD Warranty CarD
q
tile distriButor q home CeNter q equipmeNt supply house
q
tool supply q Bldg material supply q reNtal equipmeNt house
are you a do-it-yourselFer qor CoNtraCtor qIF so, what type? tile qmasoNry qother
what Criteria was importaNt iN ChoosiNg this saw? (rate From 1 to 5, 5 BeiNg the most importaNt)
power preCisioN portaBility availaBility other
If within one (1) Year from the date of purchase, this MK Diamond saw fails due to defect in material or workmanship, MK will repair it, free of charge when the unit is re
-
turned to the dealer where it was purchased. This warranty DOES NOT cover normal wear or damage resulting from operator abuse. In no event shall MK Diamond Products,
Inc. be liable for consequential damages arising out of the failure of any product if operated improperly. MK Diamond Products may act as a warranty station for motor/en
-
gine repairs based on an individual agreement with the manufacturer. This warranty is in lieu of all other warranties express or implied.
©2010 All Rights reserved. MK Diamond Products, Inc. • P/N 155037 MK Warranty Card (02/10)
m
K diamoNd warraNty 1315 Storm Parkway, Torrance, CA 90509 USA | www.mkdiamond.com | 1.800.421.5830 | 1.310. 539.5158
where did you purChase this saw Fro m ? N a me
Comme
Nts or suggestioNs:
p
riCe
date purChased
Pump
Manual
06.2019
MK-377EXP TILE SAW
OWNER'S MANUAL
& PARTS LIST
www.mkdiamond.com
Caution: Read all safety and operating instructions
before using this equipment. This parts list MUST
accompany the equipment at all times.
Revision 206
Manual Part No. 160030
Part# 160028
UNPACKING
Use proper lifting techniques when lifting the MK-377EXP
Remove the MK-377EXP and accessory box from the carton.
CONTENTS
MK-377EXP
Pan & Frame
MK-377EXP
Cutting Head
Splash Guard
Cooling
Transfer Tube
Blade Nut
Wrench
Shaft
Wrench
Rip Guide Electric
Water Pump
Flow
Adjusting Clamp
Warranty
Card
Owner's
Manual
Diamond Blade
One (1) MK-377EXP cutting surface & water pan
One (1) MK-377EXP cutting head
One (1) 7-inch wet cutting blade
One (1) splash guard
One (1) blade nut wrench
One (1) extended rip guide
One (1) electric water pump
One (1) cooling transfer tube
One (1) flow adjusting clamp
One (1) shaft wrench
One (1) owners manual
One (1) pump manual
One (1) warranty card
CAUTION
MK-377EXP SAW UNPACKING
TRANSPORT
Lift Point
Lift Point
1. The MK-377EXP weighs approximately twenty-seven (27) pounds; use care when transporting.
2. Never transport the MK-377EXP with water in the Water Pan.
CAUTION

16
MK-377EXP SAW INSTALLATION
(D)
Align the Cutting Head Retaining
Holes to the holes on the Post.
Follow the assembly instructions to prepare your MK-377EXP for operation.
CUTTING HEAD INSTALLATION
(B)
Remove the Blade Guard
Wingnut and then remove
the Blade Guard.
(A)
Loosen the Blade Guard
Retaining Knob.
(C)
Locate and remove the three
Cutting Head Retaining
Screws using a Phillips
Screwdriver.
(B)
Loosen the Blade Guard
Retaining Knob and open
the Blade Guard.
(A)
Loosen the Blade Guard
Retaining Wingnut.
(C)
Place the Shaft Wrench on
the Motor Shaft rotate blade
shaft so shaft wrench is
engaged.
DIAMOND BLADE INSTALLATION
When installing the Retaining Screw, do not "cross-thread" and DO NOT over tighten the screw.
NOTE:
(E)
Install the three Cutting Head
Retaining Screws using a
Phillips Screwdriver.
(F)
Install the Blade Guard
and tighten Wingnut and
Retaining Knob.

17
When installing the Retaining Screw, do not "cross-thread" and DO NOT over tighten the screw.
MK-377EXP SAW INSTALLATION
(E)
Install Diamond Blade onto
Blade Shaft.
(D)
Place the Blade Wrench on the
Blade Retaining Nut and remove
the Blade Retaining Nut and
Outer Flange.
(F)
Verify the Directional Arrow of
the Blade faces outward and
matches the Directional Arrow of
the Blade Guard.
(H)
Close the Blade Guard and
tighten the Blade Guard
Retaining Knob.
(G)
Install the Outer Flange and
Retaining Nut; install the Shaft
Wrench and Blade Wrench as
shown in Step D and tighten the
Retaining Nut.
(I)
Tighten the Blade Guard
Retaining Wingnut.
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.
CAUTION

18
(B)
Install the Thumbscrew through the
Washer and Splashguard then align
to the hole found on back of the Blade
Guard and tighten.
MK-377EXP SAW ASSEMBLY
ADJUSTABLE CUTTING GUIDE INSTALLATION
NOTE: The Adjustable Cutting Guide can be used on either side of the Diamond Blade.
(A)
Loosen Adjustable Cutting
Guide retaining thumbscrew
and place it over the Movable
Cutting Table and Ruler/Stop.
(B)
Place the Adjustable Cutting
Guide onto the Movable Cutting
and tighten the retaining
thumbscrew.
SPLASH GUARD INSTALLATION
(A)
Remove Thumbscrew
and washer from back of
Blade Guard.
PRE-START INSPECTION
Prior to beginning work, a pre-start inspection of the saw should be performed.
(B)
Inspect the Pump Assembly for
damage - ensure the cord is free
of cracks or cuts.
(A)
Ensure the ON/OFF Switch
is in the OFF position.
(C)
Inspect the Diamond Blade for
damage – verify the blade is
correct for the type of material
being cut.

19
WATER PUMP PREPARATION
(B)
Connect the Cooling Transfer
Tube to the inlet connection of
the Blade Guard.
(A)
Press the end of the Cooling
Transfer Tube onto the Water
Pump.
(E)
Verify the Movable Cutting
Table moves freely.
(D)
Inspect the MK-377EXP for
damage – ensure the cord is
free of cracks or cuts.
(D)
Fill the Water Pan with
clean water covering Pump
suction (this should be done
periodically during cutting).
(E)
Connect the Water Pump power
cord to the connection found on
the back of the motor.
MK-377EXP SAW ASSEMBLY
(C)
Place the Water Pump in the
Water Pan with the suction down
and insert the Pump Cord to the
clip in the back. Ensure pump is
against back of water pan.

20
SETUP FOR OPERATION
1. Before connecting the MK-377EXP to a power supply, be sure the voltage,
cycle and phase meet the requirements of table below.
2. If using an extension cord, make sure the length and wire gauge
correspond to the requirements listed in the table on page 10. An extension
cord that is too small in wire gauge (diameter), or too long in length, will
cause the motor to overheat and could cause premature failure.
3. Before connecting the MK-377EXP to a power supply, be sure the voltage,
cycle and phase of the job site power source meet the requirements in the
table below.
4. Use an approved Ground Fault Circuit Interrupter (GFCI).
5. Do not cover the motor vents as this could lead to motor overheating.
VOLTAGE 120v
CYCLE 60Hz
PHASE 1-phase
In order to avoid breaker tripping, a 20 amp circuit breaker should be used.
NOTE:
(A)
Plug MK-377EXP into the
GFCI (A GFCI should always
be used when operating the
MK-377EXP).
(B)
Plug the GFCI into the
power source.
CAUTION
MK-377EXP SAW OPERATION