MK Diamond Products MK-377 User manual

06.2014
MK-377 TILE SAW
OWNER'S MANUAL
OPERATING INSTRUCTIONS
& 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 102
Manual Part# 160030

2
INTRODUCTION
Congratulations on your purchase of a MK-377 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-377 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-377 Saw safely and correctly. Please take the time to familiarize
yourself with the MK-377 Saw by reading and reviewing this manual.
Read and follow all safety, operating and maintenance instructions.
If you should have questions concerning your MK-377 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:
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 5
Hazard Symbols 6
California Proposition 65 Message 7
Electrical Requirements and Grounding Instructions 8-11
Safety Label Locations 12
Product Specications 13
UNPACKING, TRANSPORT
Unpacking 14
Contents 14
Transport 14
STARTUP, ADJUSTMENT, OPERATION and SHUTDOWN
Cutting Head Installation 15
Diamond Blade Installation 15-16
Adjustable Cutting Guide Installation 17
Splash Guard Installation 17
Pre-Start Inspection 17
Water Pump Preparation 17-18
Setup for Operation 19
Adjustment & Operation 20
Cleanup 21-22
Lockout 22
MAINTENANCE AND TROUBLESHOOTING
Maintenance 22-23
Blade Dressing 23
Motor Brush Change Out 24
Troubleshooting 25-27
EXPLODED VIEW AND PARTS LIST
Exploded View & Parts List 28-30
ACCESSORIES ORDERING and RETURN INSTRUCTIONS
Accessories 32
Ordering Information 34
Return Material Policy 34
Packaging Instructions 34
Authorized Service Centers 34
Contact & Warranty 35

4
MK-377 SAW SAFETY
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.
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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.
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In order to prevent injury, the following safety precautions and symbols should be followed at all times!
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 PLACES
DO NOT use power tools in damp or wet locations nor expose them to rain. Always keep
the work area well lighted.
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...
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5
MK-377 SAW SAFETY
ALWAYS place the power ON/OFF switch in the OFF position when the saw is not in use.
ON / OFF
MAKE THE WORKSHOP KID PROOF
Make the workshops kid proof by using padlocks, master switches or by removing starter keys.
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.
USE THE PROPER EXTENSION CORD
If using an extension cord make sure it is in good condition rst. When using an extension
cord, be sure to use one heavy enough to carry the current your product will draw. An un-
dersized cord will cause a drop in line voltage that will result in a loss of power and over-
heating. Page 9 shows the correct AWG size to use depending on cord length and name-
plate ampere rating. If in doubt, use the next heavier gauge. The smaller the gauge number,
the heavier the cord.
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 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 clean for the best and safest performance. Always follow maintenance instruc-
tions for lubricating, and when changing accessories.
DISCONNECT TOOLS
Power tools should always be disconnected before servicing or when changing accessories,
such as blades, bits, cutters, and the like.
KEEP CHILDREN AWAY
All visitors and children should be kept a safe distance from work area.
ALWAYS wear approved respiratory, head, ear and eye protection
when operating this machine.
PERSONAL PROTECTIVE EQUIPMENT
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6
MK-377 SAW SAFETY
NEVER LEAVE A TOOL 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.
NEVER STAND ON THE TOOL
Serious injury could occur if a power tool is tipped, or if a cutting tool is unintentionally
contacted.
CHECK FOR DAMAGED PARTS
Before using a power tool, check for damaged part. A guard or any other part that is dam-
aged should be carefully checked to determine if 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.
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.
USE RECOMMENDED ACCESSORIES
ALWAYS ensure that the machine is on level ground before using.
When loading or unloading the machine, use caution. Remove the blade prior to hoisting,
loading and transporting the machine.
TRANSPORT
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.
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 when not feeling well due to fatigue, illness or taking medicine.
Check the chemical properties of the material to be cut/grinded and follow all EPA/OSHA
Regulations.

7
MK-377 SAW SAFETY
Diamond Blades improperly used are dangerous. Comply with American National Standards Insti-
tute 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
WARNING
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on
DO NOT EXPOSE TO RAIN
DO NOT expose to rain or use in damp locations.
ROTATING PARTS
Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never
operate 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.
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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.

8
MK-377 SAW SAFETY
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 and §1503.1).
Visit http://www.osha.gov for more information.
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
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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 HEPA vacuum cleaner. Observe OSHA 29 CFR part 1926.57 and 1926.103.

9
MK-377 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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10
MK-377 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-377 SAW SAFETY
Drip Loop Information
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.
WARNING
Use of under sized 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, 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.
WARNING
WARNING
EXTENSION CORD LENGTH
Nameplate
Amperes
115V 25' 50' 75' 100' 150' 200'
250V 50' 100' 150' 200' 300' 400'
0 - 5 16 16 16 14 12 12
5.1 - 8 16 16 14 12 10 •
8.1 - 12 14 14 12 10 • •
12.1 - 15 12 12 10 10 • •
15.1 - 20 10 10 10 • • •
The “drip loop” is that part of the cord below the level of the recep-
tacle, 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. Discon-
nect the fuse or circuit breaker that supplies power to the tool. Then
unplug and examine for presence of water in the receptacle.

12
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.
Decal/Label Location Description
AMotor - Back Caution - Receptacle is for Water Pump Only
BMotor - Side Caution - Use with GFCI only
CMotor - Top Service/ Warranty
DMotor Post Warning - Silica Warning
ECutting Head – Top Warning - Read Owners Manual
F Table Notice - Voltage/extension cords
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
Tile Saws
Receptacle is for
water pump only.
125V, .6 amps max.
!CAUTION
This saw is to be used
with a Ground Fault
Circuit Interrupter.
!CAUTION
Tile Master Label Sheet Part#166012
Label B
Label A
Label C
Label D
Label E
Label F
SERVICE OR
WARRANTY
FORINFORMATIONON
PLEASE CALL
1-800-474-5594
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.
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
NOTICE
Most Motor Problems are caused by improper
voltage and extension cords. Cord should be
one-piece and short as possible. Cord
selection should match the following table.
1-2 H.P.
25’
50’
75’
100’
150’
250’
Max. Cord Length
Max. Cord Length
Max. Cord Length
No. 12 Wire
No. 10 Wire
No. 8 Wire
115v 230v
!
WARNING
!
F
E
C
A
B
D
MK-377 SAW SAFETY LABELS

13
PRODUCT SPECIFICATIONS
The MK-377 is a versatile Tile Saw. Operated and used according to this manual, the MK-377 will
provide years of dependable service.
General Description
Motor Specifications
Blade Capacity
Tile Types
The MK-377 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 fourteen (14) inches in length. The saw can
cut an object two (2) inches thick in one pass.
Motor specifications for the MK-377 are listed in the table below.
Voltage 120v
Motor Amperage 5
Frequency 50/60Hz
RPM 5500 rpm
Horse Power 1/2 hp
The MK-377 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-377 can cut a variety of tile types including stone, ceramic, slate, granite, marble, porcelain,
and lapidary products.
NOTE: The MK-377 is not designed to cut plastic or metals.
MK-377 SAW PRODUCT SPECIFICATIONS

14
The MK-377 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)
mK 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
CommeNts or suggestioNs:
priCe
date purChased
Pump
Manual
05.2010
MK-377
OWNERS MANUAL
PARTS LIST &
OPERATING INSTRUCTIONS
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 100
Manual Part# 160030
UNPACKING
Use proper lifting techniques when lifting the MK-377
Remove the MK-377 and accessory box from the carton.
CONTENTS
MK-377
Cutting Surface
MK-377
Cutting Head
Splash Guard
Cooling
Transfer Tube
Blade Nut
Wrench
Shaft
Wrench
Rip Guide Electric
Water Pump
Flow
Adjusting Clamp
Warranty
Card
Owners
Manual
Diamond Blade
One (1) MK-377 cutting surface & water pan
One (1) MK-377 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-377 SAW UNPACKING
TRANSPORT
Lift Point
Lift Point
1. The MK-377 weighs approximately thirty (30) pounds; use care when transporting.
2. Never transport the MK-377 with water in the Water Pan.
CAUTION

15
MK-377 SAW INSTALLATION
(D)
Align the Cutting Head Retaining
Holes to the holes on the Post
Follow the assembly instructions to prepare your MK-377 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 (NOTE: the Outer and Inner
Flanges and the Blade Nut are removed
in the photo above) 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

16
MK-377 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 Steps C and D and
tighten the Retaining Nut
(I)
Tighten the Blade Guard
Retaining Wingnut

17
(B)
Install the Thumbscrew
through the Washer and Splashguard
then align to the hole found on back of
the Blade Guard and tighten
MK-377 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

18
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-377 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-377 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.

19
SETUP FOR OPERATION
1. Before connecting the MK-377 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-377 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-377 into the GFCI (A
GFCI should always be used
when operating the MK-377)
(C)
Plug the GFCI into the
power source
CAUTION
MK-377 SAW OPERATION

20
MK-377 SAW OPERATION
ADJUSTMENT & OPERATION
DO NOT FORCE THE TOOL. It will do the job better and safer at the rate for
which it was designed.
CAUTION
(A)
Loosen the retaining thumbscrew
and place the Adjustable Cutting
Guide to the desired cut length
and tighten thumbscrew
(B)
Place the tile against the
Ruler/Stop and Cutting Guide
(C)
Turn the motor ON and verify proper
cooling flow on both sides of the
blade (See Maintenance Section to
increase/decrease flow)
(D)
Perform the cut. Turn the motor
OFF when work is complete