US SAWS JS - SERIES User manual

U.S.SAWS JS - SERIES
OPERATING MANUAL
TO PREVENT SERIOUS INJURY DO NOT OPERATE SAW WITHOUTPROPER TRAINING AND.
UNDERSTANDING OF THE OWNERS MANUAL
WHEN OPERATING THIS MACHINE
ALWAYS WEAR SAFETY APPROVED
HEARING PROTECTION
EYE OR FACE PROTECTION
PROTECTIVE HELMET
PROTECTIVE GLASSES OR FULL FACE PROTECTION
WEAR HAND PROTECTION
WARNING: Improperly maintaining the JS including the Honda engine or failing to correct a problem before
operation could cause a malfunction resulting in a serious injury. Always perform a pre-operation inspection before
each operation and correct any problem. See Honda Engines Owner's Manual.
5.2 Check the condition of the Honda engine. See the section titled "Before operation - is your
engine ready to go?" in the Honda Engines Owner's Manual.
WARNING: Exhaust gas from gasoline engines contains dangerous carbon monoxide. Breathing it can cause
unconsciousness and even kill you. Always operate gasoline engine machines in a well-ventilated area. Do not
operate in areas where exhaust fumes could accumulate without wearing appropriate respiratory protection.
Consult your employer and OSHA regarding use of appropriate respirator for dangerous carbon monoxide
gases. See Figure 7.
EEnnggiinneeeexxhhaauussttccoonnttaaiinnss
ppooiissoonnoouussccaarrbboonn
mmoonnooxxiiddeeggaass..Breathing
it could cause death.
Operate machine in well
ventilated area.
FFiigguurree77--WWaarrnniinnggllaabbeell--eennggiinneeeexxhhaauussttccoonnttaaiinnssccaarrbboonnmmoonnooxxiiddeeggaass1111
U.S. English
05-31-2020
Notice of Copyright Protection
Copyright 2020, by U.S.SAWS . All rights reserved. This work may not be reproduced or disseminated in whole or in part by any
means without the prior written permission of U.S.SAWS
Surface Prep
Division
P: 877-817- 6687 F: 813-621-7125
Visit us at www.ussaws.com
[email protected]

INTRODUCTION & SPECIFICATIONS
Surface Prep
Division
P: 877-817- 6687 F: 813-621-7125
Visit us at www.ussaws.com
[email protected]
Read this entire operations and maintenance manual before using your new
tool. Pay close attention to the Rules for safer operation,
Dangers, Warnings and Cautions.
The purpose of safety symbols and explanations are to attract your atten-
tion to possible hazards and how to avoid them. The safety symbols and
explanations do not by themselves eliminate any danger. The instructions
or warnings they give are not substitutes for proper accident prevention
measures.
Model Identication: Record machine serial number plate information
below for future reference
Table of Contents & Introduction ..................................................... 2
Symbols & Decals ................................................................... 3
Safety Instruction ................................................................... 4 - 5
Pre-Operation Checklist ..............................................................6 - 8
Operation ................................................................... 9 - 12
Maintenance & Inspection .................................................... 13 - 14
Warranty & Service ............................................................. 15 - 18
Section Page
1.0 INSTRUCTIONS FOR USE OF MANUAL SECTIONS
2.0 SPECIFICATIONS
Foreword/Introduction
DANGER: Indicates an imminently hazardous situation that if not avoided,
will result in death or serious injury. This signal word is limited to the most
extreme situations.
WARNING: Indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation that, if not avoided
may result in minor or moderate injury. It may also be used to alert against
unsafe practices that may cause property damage.
JS SERIES SAWS engine:
JS SERIES SAWS engine:
Fuel type:
Oil type & capacity:
JS SERIES SAWS Weight:
JS SERIES SAWS weight:
Blade speed:
Blade diameter sizes:
Blade depth cut:
Blade type:
Overall size:
Blade nut wrench size:
Shaft diameter:
Flanged bearing grease:
Assembly part numbers:
Recommended
dust collector system:
Vacuum hose size:
Honda 11.7 HP Gas Powered
5HP 230v 1-phase, 5HP 208/480v 3-phase
Unleaded gasoline, 86 octane or higher
SAE10W-30, 1.16qt
160 pounds gas
180 pounds electric
5400 RPM maximum
8” and 10”
3” with 10” blade, 2” with 8” blade
Dry diamond, 1” arbor hole, & single drive pinhole
28.3” W X 35.5” L X 37.5” H
1-1/2”
1”
ALVANIA® Grease 3 every 100 hours
JS SERIES SAWS 11.7 hp GAS SX77131
230v 1-phase Electric SX77100
208/480v 3-phase Electric SX77104
Propane SX77160
U.S. SAWS Ultra -Vac Gas SX50005G
3” SX73408
2
The owner’s manual is intended to point out some of the basic safety situa-
tions that maybe encountered during the normal operation & maintenance
of the JS Walk Behind Machine & to instruct you in safety practices for deal-
ing with these conditions. Keep all manuals provided with your
machine in a safe place at all times.
The information and specications included in this publication were
in effect at the time of approval for printing. U.S.SAWS reserves the right,
however, to discontinue or change specications or design at any time with-
out notice and without incurring any obligation.
Typical applications for the U.S.SAWS JS SERIES SAWS would be joint
cleanout and trench cutting. The saw uses dry cut diamond blades in either
8” diameters or 10” diameters with an allowable maximum depth cut of 3”.
The blade rotates in an upward direction allowing for easy dust collection
when connected to an appropriate vacuum system. The machine should al-
ways be operated with a dust collection system and in a well-ventilated area
due to carbon monoxide fumes emitted from the gasoline engine.
TO PREVENT SERIOUS INJURY DO NOT OPERATE SAW WITHOUTPROPER TRAINING AND.
UNDERSTANDING OF THE OWNERS MANUAL
WHEN OPERATING THIS MACHINE
ALWAYS WEAR SAFETY APPROVED
HEARING PROTECTION
EYE OR FACE PROTECTION
PROTECTIVE HELMET
PROTECTIVE GLASSES OR FULL FACE PROTECTION
WEAR HAND PROTECTION
WARNING: Improperly maintaining the JS including the Honda engine or failing to correct a problem before
operation could cause a malfunction resulting in a serious injury. Always perform a pre-operation inspection before
each operation and correct any problem. See Honda Engines Owner's Manual.
5.2 Check the condition of the Honda engine. See the section titled "Before operation - is your
engine ready to go?" in the Honda Engines Owner's Manual.
WARNING: Exhaust gas from gasoline engines contains dangerous carbon monoxide. Breathing it can cause
unconsciousness and even kill you. Always operate gasoline engine machines in a well-ventilated area. Do not
operate in areas where exhaust fumes could accumulate without wearing appropriate respiratory protection.
Consult your employer and OSHA regarding use of appropriate respirator for dangerous carbon monoxide
gases. See Figure 7.
EEnnggiinneeeexxhhaauussttccoonnttaaiinnss
ppooiissoonnoouussccaarrbboonn
mmoonnooxxiiddeeggaass..Breathing
it could cause death.
Operate machine in well
ventilated area.
FFiigguurree77--WWaarrnniinnggllaabbeell--eennggiinneeeexxhhaauussttccoonnttaaiinnssccaarrbboonnmmoonnooxxiiddeeggaass1111

SYMBOLS & DECALS
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Comm unication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Commu nication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Commu nication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Comm unication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1hazard Communication S ywems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Comm unication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Comm unication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
3
Read and understand operator’s
manual before using this machine.
Failure to follow operating Instruc-
tions could result in injury or dam-
age to equipment.
Flying debris and loud noise
hazards. Wear ear and eye
protection
Wear safety boots when
operating this machine
Wear appropriate clothing
Wear hand protection
Keep all guards in place
Rotating blade hazard.
Do NOT operate with guard up.
Keep hands and feet away.
Engine exhaust contains poi-
sonous carbon monoxide gas.
Breathing it could cause death.
Operate machine in well venti-
lated area.
AVOID INJURY.
Do NOT operate with guard re-
moved. Replace guard before
operating machine.
TO AVOID INJURY.
Always inspect saw blades be-
fore use. Replace all cracked
or damaged blades.
Wear Head Protection, breath-
ing protection, and the use of
hearing protection is manda-
tory
Use only diamond blades (steel cen-
tered diamond cutting-off wheels) with
this machine. RPM rating on blade must
exceed machine max rpm rating. The
use of any other blade could result in
death or serious injury.
TO PREVENT SERIOUS INJURY DO NOT OPERATE SAW WITHOUTPROPER TRAINING AND.
UNDERSTANDING OF THE OWNERS MANUAL
WHEN OPERATING THIS MACHINE
ALWAYS WEAR SAFETY APPROVED
HEARING PROTECTION
EYE OR FACE PROTECTION
PROTECTIVE HELMET
PROTECTIVE GLASSES OR FULL FACE PROTECTION
WEAR HAND PROTECTION
WARNING: Improperly maintaining the JS including the Honda engine or failing to correct a problem before
operation could cause a malfunction resulting in a serious injury. Always perform a pre-operation inspection before
each operation and correct any problem. See Honda Engines Owner's Manual.
5.2 Check the condition of the Honda engine. See the section titled "Before operation - is your
engine ready to go?" in the Honda Engines Owner's Manual.
WARNING: Exhaust gas from gasoline engines contains dangerous carbon monoxide. Breathing it can cause
unconsciousness and even kill you. Always operate gasoline engine machines in a well-ventilated area. Do not
operate in areas where exhaust fumes could accumulate without wearing appropriate respiratory protection.
Consult your employer and OSHA regarding use of appropriate respirator for dangerous carbon monoxide
gases. See Figure 7.
EEnnggiinneeeexxhhaauussttccoonnttaaiinnss
ppooiissoonnoouussccaarrbboonn
mmoonnooxxiiddeeggaass..Breathing
it could cause death.
Operate machine in well
ventilated area.
FFiigguurree77--WWaarrnniinnggllaabbeell--eennggiinneeeexxhhaauussttccoonnttaaiinnssccaarrbboonnmmoonnooxxiiddeeggaass1111
TO PREVENT SERIOUS INJURY DO NOT OPERATE SAW WITHOUTPROPER TRAINING AND.
UNDERSTANDING OF THE OWNERS MANUAL
WHEN OPERATING THIS MACHINE
ALWAYS WEAR SAFETY APPROVED
HEARING PROTECTION
EYE OR FACE PROTECTION
PROTECTIVE HELMET
PROTECTIVE GLASSES OR FULL FACE PROTECTION
WEAR HAND PROTECTION
WARNING: Improperly maintaining the JS including the Honda engine or failing to correct a problem before
operation could cause a malfunction resulting in a serious injury. Always perform a pre-operation inspection before
each operation and correct any problem. See Honda Engines Owner's Manual.
5.2 Check the condition of the Honda engine. See the section titled "Before operation - is your
engine ready to go?" in the Honda Engines Owner's Manual.
WARNING: Exhaust gas from gasoline engines contains dangerous carbon monoxide. Breathing it can cause
unconsciousness and even kill you. Always operate gasoline engine machines in a well-ventilated area. Do not
operate in areas where exhaust fumes could accumulate without wearing appropriate respiratory protection.
Consult your employer and OSHA regarding use of appropriate respirator for dangerous carbon monoxide
gases. See Figure 7.
EEnnggiinneeeexxhhaauussttccoonnttaaiinnss
ppooiissoonnoouussccaarrbboonn
mmoonnooxxiiddeeggaass..Breathing
it could cause death.
Operate machine in well
ventilated area.
FFiigguurree77--WWaarrnniinnggllaabbeell--eennggiinneeeexxhhaauussttccoonnttaaiinnssccaarrbboonnmmoonnooxxiiddeeggaass1111
Surface Prep
Division
P: 877-817- 6687 F: 813-621-7125
Visit us at www.ussaws.com
[email protected]
For Safe Operation
You must be qualied for safe operation of the U.S.SAWS JS walk behind
machine. You must clearly understand the written instructions supplied
by U.S.SAWS, be trained - including actual operation - & know the safety
rules & regulations for the job site. It is a safety practice to point out & ex-
plain safety signs & practices to others & to make sure they understand
the importance of following these instructions.
Be Safe
Human error is the result of many factors: carelessness, fatigue, sensory
overload, preoccupation, unfamiliarity with the machine or attachments,
or drugs or alcohol, to name a few. You can avoid serious injury or death
caused by these & other unsafe work practices. Be safe and never as-
sume accidents cannot happen to you.
For your safety and the safety of others, act safely and encourage your
fellow workers to act safely as well.
Wear proper electrostatic
grounding equipment at all
times. Static discharge during
fueling can cause explosion
3.0 SYMBOLS & DECALS

SAFETY INSTRUCTIONS
4.1 KNOW THE RULES & YOUR EQUIPMENT.
Most job sites have rules governing equipment use & maintenance.
Before starting at a new work location, check with the supervisor or
safety coordinator. Ask about any rules or regulations you need to
abide.
OSHA enforces federal laws within the United States that apply to the
safe operation, application, & maintenance of equipment on job sites.
It is the employer’s responsibility to comply with these laws.
Do not operate this machine unless you have read the operations
and maintenance manual carefully. Read any additional instructions
included from other manufacturers and organizations such as Honda®
and the Masonry and Concrete Saw Manufacturers Institute. Learn the
applications and limitations as well as the specic potential hazards
related to this tool
4.2 RECEIVE PROPER TRAINING.
Do not operate this machine unless you have received operational and
maintenance training from a U.S. SAWS representative or from an autho-
rized distributor for U.S.SAWS.
4.3 PROTECT YOUR FEET.
Observe all applicable local, state and federal safety regulations. Wear
OSHA approved foot protection.
4.4 PROTECT YOUR EYES.
Observe all applicable local, state and federal safety regulations. Wear
OSHA approved safety glasses.
4.5 PROTECT YOUR LUNGS.
Breathable silica may be generated by use of this product. Silica can
cause severe and permanent lung damage, cancer, and other serious
diseases. Do not breath the dust. Do not rely on your sight or smell to
determine if the dust is in the air. Silica may be in the air without a vis-
ible dust cloud. If air monitoring equipment for silica is not provided by
your employer at your work site, you MUST wear appropriate respiratory
protection when using or servicing the machine. Consult your employer
and OSHA regarding the appropriate respiratory protection.
4.6 PROTECT YOUR HEARING.
Observe all applicable local, state and federal safety regulations. Wear
OSHA approved hearing protection.
4.7 DRESS PROPERLY.
Do not wear loose clothing or jewelry that can be caught in moving parts.
Wear protective hair covering to contain long hair. Keep hair away from
motor air vent. Rubber gloves and non-skid footwear are recommended
when working outdoors
4.8 AVOID A DANGEROUS ENVIRONMENT.
Do not expose machine to rain. Do not use machine in wet conditions.
Keep work area well lit. When working at an elevated location, pay atten-
tion to articles and persons below.
4.9 BEWARE OF HIDDEN DANGERS IN CONCRETE.
Rebar or utility lines may be buried in concrete. Disconnect the power to
any utility lines. If these items are to be missed, clearly mark the area. If
these items are to be cut, check the blade manufacturer’s guidelines on
material to be cut.
4.10 AVOID ANY AREAS OR ACTIONS THAT EXPOSE YOU TO CAR-
BON MONOXIDE.
Exhaust gas from gasoline engines contains dangerous carbon monox-
ide. Breathing it can cause unconsciousness and even kill you. Always
operate gasoline engine machines in a well-ventilated area. Do not
operate in areas where exhaust fumes could accumulate without wear-
ing appropriate respiratory protection. Consult your employer and OSHA 4
regarding use of appropriate respirator for dangerous carbon monoxide
gases.
4.11 KEEP WORK AREA CLEAN. DO NOT RUN OVER ANYTHING.
Loose objects could be thrown from crack. Make sure area to be cut is
clear from people and any loose objects, nuts, bolts, etc. Never run over
any loose
objects.
4.12 KEEP CHILDREN AND VISITORS AWAY.
Do not allow anyone to stand in line with the blade path. Do not let children
or visitors contact machine or extension cord. Keep children and visitors
away from the work area.
4.13 AVOID FLAMMABLE LIQUIDS OR GASES.
Engines and diamond blades produce heat and sparks during operation.
Never use machines in dangerous sites containing ammable, combustible
or explosive materials such as lacquer, paint, benzene, thinner, gasoline,
gases, and adhesive agents.
4.14 AVOID CONTACT WITH HOT MUFFLER.
The mufer becomes hot during operation and remains hot after stopping
the engine. Do not touch the mufer while it is hot. Let the engine cool
before storing indoors. Do not place ammable objects close to the engine.
4.15 AVOID CONTACT WITH HOT BLADE AND BLADE GUARD.
The blade and blade guard become hot during operation and remain hot
after stopping the engine. Do not touch the blade and blade guard without
proper hand protection.
4.16 KEEP FIRM GRIP ON MACHINE.
During normal operation as instructed in Section 6.0, keep a rm hold
on the handle grips and maintain control of the machine until the blade
completely stops.
4.17 SHUT OFF ENGINE.
When not in use, before servicing and when changing accessories shut off
engine. Release the lever switch and move the on/off switch to the OFF
position. Move the fuel valve lever to the OFF position.
4.18 REFUEL WITH CARE.
Gasoline is extremely ammable. Gasoline vapor can explode. Refuel out-
doors, in a well ventilated area, with the engine in the OFF position. Never
smoke near gasoline and keep other ames and sparks away. Always store
gasoline in an approved container. If any gasoline is spilled, make sure the
area is dry before starting the engine.
4.19 CHECK BLADE AND MACHINE ROTATION DIRECTION.
Never operate a blade in the wrong rotation direction. Check the machine
rotation direction and blade direction when mounting a blade.
4.20 CHECK BLADE MAXIMUM ALLOWABLE SPEED.
Check the maximum operating speed of the machine and blade. Never use
a blade rated less than the machine’s maximum speed rating.
4.21 CHECK BLADE FOR CRACKS, DAMAGE, AND MISALIGNMENT.
Never use a cracked, damaged, or misaligned blade. After mounting blade,
rotate by hand to check for proper alignment.
4.22 CHECK DIAMOND BLADE FOR WARNINGS.
Many diamond blades contain a chemical known to the state of California
to cause cancer and/or birth defects or other reproductive harm. Diamond
blades improperly used are dangerous. Comply with American National
Standards Institute Safety Code B71 and Occupational Safety & Health Act
covering SPEED, SAFETY GUARDS, FLANGES, MOUNTING PROCEDURES,
GENERAL OPERATING RULES, HANDLING, STORAGE& INSPECTION AND
GENERAL MACHINE CONDITIONS. Read Diamond Blades Safety Manual
before use.
4.23 DO NOT FORCE WRONG SIZE OR TYPE BLADE ONTO MACHINE.
Do not force a blade onto the machine shaft or alter the size of the arbor-
mounting hole. Be certain that the drive pin is in place through
the blade when tightening the blade nut. Never add a drive pin hole or
modify a blade.
Surface Prep
Division
P: 877-817- 6687 F: 813-621-7125
Visit us at www.ussaws.com
[email protected]
4.0 SAFETY INSTRUCTIONS

SAFETY INSTRUCTIONS
5
4.24 USE CORRECT SAW AND ACCESSORIES.
Do not force a small saw to do the job of a heavy-duty saw. Do not use the
saw for improper applications. Never cut material for which the blade was
not designed. Check blade manufacturer’s guidelines on material to be
cut.
4.25 STORE IDLE EQUIPMENT.
The machine, blades and tools should be stored in a dry and secure loca-
tion when not in use. Keep equipment out of reach of children.
4.26 DO NOT FORCE SAW.
The saw will do the job better and safer at the rate for which it was de-
signed.
4.27 OBTAIN MATERIAL SAFETY DATA SHEET (MSDS) FOR ALL
WORK SURFACE MATERIALS.
This includes primers, all coatings, adhesives, tile and crack lling materi-
als, etc. Do not attempt to cut, clean out or remove material without MSDS
information. Consult MSDS sheet for hazards information. Be aware that
some materials are explosive as a dust.
4.28 DO NOT OVERREACH.
Keep proper footing and balance at all times.
4.29 MAINTAIN MACHINE WITH CARE.
Keep machine clean and follow maintenance procedures for better and
safer performance. Keep handles dry, clean, and free from oil and grease.
Follow instructions for lubricating and changing accessories.
4.30 REMOVE ADJUSTING TOOLS.
Form a habit of checking to see that tools such as adjusting wrenches are
removed from the machine and properly stored before starting the engine.
4.31 STAY ALERT.
Watch what you are doing. Use common sense. Do not operate machine
when you are tired or fatigued.
4.32 DO NOT USE DRUGS, ALCOHOL, MEDICATION.
Do not operate machine while under the inuence of drugs, alcohol,
or any medication.
4.33 KEEP THE RIGHT PARTS IN THE RIGHT POSITIONS.
Do not operate machine with parts missing or improperly mounted.
4.34 CHECK DAMAGED PARTS.
Verify all machine guards are in good condition and will function properly
before using the machine. Check for alignment of moving parts, binding of
moving parts, breakage of parts, mounting, and any other conditions that
may affect machine operation. A guard, power switch or other part that is
damaged should be properly repaired or replaced by an authorized service
center unless indicated elsewhere in this instruction manual. Do not oper-
ate machine if lever or engine on/off switch does not function properly.
4.35 SECURELY MOUNT ACCESSORIES AND BLADES TO THE
MACHINE.
Extra care must be taken when using saws on an elevated location to pre-
vent injury to someone on a lower level in the event the tool or accessory
should drop. Do not operate without fall protection for operator and debris
protection for public.
4.36 NEVER TOUCH THE MOVING PARTS.
Never touch moving parts such as blades, belts and others.
4.37 STOP OPERATION IMMEDIATELY IF ANY ABNORMALITY IS
DETECTED.
Stop using machine immediately if any abnormalities are observed during
operation. Examples of abnormalities include unusual noise and vibration.
4.38 WHEN REPLACING A PART, USE THE SAME TYPE
AND QUALITY.
When replacing a component part with a new one, use only the same
type and quality of new part. Never attempt to repair a machine if you are
unfamiliar with proper procedures and techniques required.
4.39 NEVER DISABLE THE LEVER.
Do not modify, disable, or attempt to permanently engage the lever. Do not
operate a machine if lever is not functioning. This could lead to serious
injury or death.
4.40 LOAD AND UNLOAD SAFELY.
Use proper heavy lifting procedures. Read & understand manuals before
loading & unloading.
4.41 STORAGE.
Always store equipment properly when it is not being used. Equipment
should be stored in a clean, dry location and out of reach of children.
4.42 SAVE THESE INSTRUCTIONS.
Refer to this operations and maintenance manual as well as any addition-
al instructions included from other manufacturers and organizations such
as Honda® and the Masonry and Concrete Saw Manufacturers Institute®.
Never permit anyone to operate the machine without proper instructions.
DUST WARNING
Cutting, especially when DRY cutting, generates dust that comes
from the material being cut, which frequently contains silica.
Silica is a basic component of sand, quartz, brick clay, granite and
numerous other minerals and rocks. Exposure to excessive amount of
such dust can cause:
• Respiratory diseases (affecting your ability to breath), including
chronic bronchitis, silicosis and pulmonary brosis from exposure
to silica. These diseases may be fatal;
• Skin irritation and rash; and
• Cancer according to NTP* and IARC*
* National Toxicology Program, International Agency for Research
on Cancer
Take precautionary steps
• Avoid inhalation of and skin contact with dust, mist and fumes;
• Wet cut when feasible, to minimize dust;
• Wear and ensure that all bystanders wear appropriate respiratory
protection such as dust masks designed to lter out microscopic
particles. (See OSHA 29 CFR Part 1910.1200)
California Prop 65 Warning: Use of this product can cause exposure to
materials known to the State of California to cause cancer and/or birth
defects or other reproductive harm.
Surface Prep
Division
P: 877-817- 6687 F: 813-621-7125
Visit us at www.ussaws.com
[email protected]

5.0 Pre-operation checklist
44..3344CCHHEECCKKDDAAMMAAGGEEDDPPAARRTTSS..
Verify all machine guards are in good condition and will function properly before using the machine.
Check for alignment of moving parts, binding of moving parts, breakage of parts, mounting, and any
other conditions that may affect machine operation. A guard, power switch or other part that is damaged
should be properly repaired or replaced by an authorized service center unless indicated elsewhere in
this instruction manual. Do not operate machine if lever or engine on/off switch does not function
properly.
44..3355SSEECCUURREELLYYMMOOUUNNTTAACCCCEESSSSOORRIIEESSAANNDDBBLLAADDEESSTTOOTTHHEEMMAACCHHIINNEE..
Extra care must be taken when using saws on an elevated location to prevent injury to someone on a lower
level in the event the tool or accessory should drop. Do not operate without fall protection for operator
and debris protection forpublic.
44..3366 NNEEVVEERRTTOOUUCCHHTTHHEEMMOOVVIINNGGPPAARRTTSS..
Never touch moving parts such as blades, belts and others.
44..3377SSTTOOPPOOPPEERRAATTIIOONNIIMMMMEEDDIIAATTEELLYYIIFFAANNYYAABBNNOORRMMAALLIITTYYIISSDDEETTEECCTTEEDD..
Stop using machine immediately if any abnormalities are observed during operation. Examples of
abnormalities include unusual noise and vibration.
44..3388WWHHEENNRREEPPLLAACCIINNGGAAPPAARRTT,,UUSSEETTHHEESSAAMMEETTYYPPEEAANNDDQQUUAALLIITTYY..
When replacing a component part with a new one, use only the same type and quality of new part.
Never attempt to repair a machine if you are unfamiliar with proper procedures and techniques
required.
44..3399DDOONNOOTTMMOODDIIFFYYMMAACCHHIINNEE..
Do not modify machine from its original design without written permission from the manufacturer. Non-
authorized modifications could lead to serious injury or death and void warranty.
44..4400NNEEVVEERRDDIISSAABBLLEETTHHEELLEEVVEERR..
Do not modify, disable, or attempt to permanently engage the lever. Do not operate a machine if lever
is not functioning. This could lead to serious injury or death.
44..4411SSAAVVEETTHHEESSEEIINNSSTTRRUUCCTTIIOONNSS..
Refer to this operations and maintenance manual as well as any additional instructions included from
other manufacturers and organizations such as Honda® and the Masonry and Concrete Saw
Manufacturers Institute®. Never permit anyone to operate the machine without proper instructions.
R
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FFiigguurree33--WWaarrnniinnggllaabbeell--rreeaaddaanndduunnddeerrssttaannddmmaannuuaall
5.1 Start by reading the entire Honda Engines Owner's Manual, Rx for Diamond Blade Safety, and Rx for Concrete
Saws by the Masonry and Concrete Saw Manufacturers Institute. Then, read the entire JS operations and
maintenance manual. Get familiar with the machine's parts. See Figure 1 through Figure 32.
PRE-OPERATION CHECKLIST
TO PREVENT SERIOUS INJURY DO NOT OPERATE SAW WITHOUTPROPER TRAINING AND.
UNDERSTANDING OF THE OWNERS MANUAL
WHEN OPERATING THIS MACHINE
ALWAYS WEAR SAFETY APPROVED
HEARING PROTECTION
EYE OR FACE PROTECTION
PROTECTIVE HELMET
PROTECTIVE GLASSES OR FULL FACE PROTECTION
WEAR HAND PROTECTION
WARNING: Improperly maintaining the JS including the Honda engine or failing to correct a problem before
operation could cause a malfunction resulting in a serious injury. Always perform a pre-operation inspection before
each operation and correct any problem. See Honda Engines Owner's Manual.
5.2 Check the condition of the Honda engine. See the section titled "Before operation - is your
engine ready to go?" in the Honda Engines Owner's Manual.
WARNING: Exhaust gas from gasoline engines contains dangerous carbon monoxide. Breathing it can cause
unconsciousness and even kill you. Always operate gasoline engine machines in a well-ventilated area. Do not
operate in areas where exhaust fumes could accumulate without wearing appropriate respiratory protection.
Consult your employer and OSHA regarding use of appropriate respirator for dangerous carbon monoxide
gases. See Figure 7.
EEnnggiinneeeexxhhaauussttccoonnttaaiinnss
ppooiissoonnoouussccaarrbboonn
mmoonnooxxiiddeeggaass..Breathing
it could cause death.
Operate machine in well
ventilated area.
FFiigguurree77--WWaarrnniinnggllaabbeell--eennggiinneeeexxhhaauussttccoonnttaaiinnssccaarrbboonnmmoonnooxxiiddeeggaass1111
Figure 1 - Warning label - read and understand manual
5.1 Start by reading the entire Honda Engines Owner’s Manual,
Rx for Diamond Blade Safety, and Rx for Concrete Saws by the
Masonry and Concrete Saw Manufacturers Institute. Then, read the
entire JS operations and maintenance manual. Get familiar with the
machine’s parts. See Figure 12 through Figure 16.
WARNING: Improperly maintaining the JS including the Honda
engine or failing to correct a problem before operation could cause a
malfunction resulting in a serious injury. Always perform a pre-opera-
tion inspection before each operation and correct any problem.
See Honda Engines Owner’s Manual.
5.2 Check the condition of the Honda engine. See the section
titled “Before operation - is your engine ready to go?” in the
Honda Engines Owner’s Manual.
TO PREVENT SERIOUS INJURY DO NOT OPERATE SAW WITHOUT PROPER
TRAINING AND. UNDERSTANDING OF THE OWNERS MANUAL
WHEN OPERATING THIS MACHINE
6
Keep all guards
in place
TO PREVENT SERIOUS INJURY DO NOT OPERATE SAW WITHOUTPROPER TRAINING AND.
UNDERSTANDING OF THE OWNERS MANUAL
WHEN OPERATING THIS MACHINE
ALWAYS WEAR SAFETY APPROVED
HEARING PROTECTION
EYE OR FACE PROTECTION
PROTECTIVE HELMET
PROTECTIVE GLASSES OR FULL FACE PROTECTION
WEAR HAND PROTECTION
WARNING: Improperly maintaining the JS including the Honda engine or failing to correct a problem before
operation could cause a malfunction resulting in a serious injury. Always perform a pre-operation inspection before
each operation and correct any problem. See Honda Engines Owner's Manual.
5.2 Check the condition of the Honda engine. See the section titled "Before operation - is your
engine ready to go?" in the Honda Engines Owner's Manual.
WARNING: Exhaust gas from gasoline engines contains dangerous carbon monoxide. Breathing it can cause
unconsciousness and even kill you. Always operate gasoline engine machines in a well-ventilated area. Do not
operate in areas where exhaust fumes could accumulate without wearing appropriate respiratory protection.
Consult your employer and OSHA regarding use of appropriate respirator for dangerous carbon monoxide
gases. See Figure 7.
EEnnggiinneeeexxhhaauussttccoonnttaaiinnss
ppooiissoonnoouussccaarrbboonn
mmoonnooxxiiddeeggaass..Breathing
it could cause death.
Operate machine in well
ventilated area.
FFiigguurree77--WWaarrnniinnggllaabbeell--eennggiinneeeexxhhaauussttccoonnttaaiinnssccaarrbboonnmmoonnooxxiiddeeggaass1111
Wear Head Protec-
tion, breathing pro-
tection, and the use
of hearing protection
is mandatory
TO PREVENT SERIOUS INJURY DO NOT OPERATE SAW WITHOUTPROPER TRAINING AND.
UNDERSTANDING OF THE OWNERS MANUAL
WHEN OPERATING THIS MACHINE
ALWAYS WEAR SAFETY APPROVED
HEARING PROTECTION
EYE OR FACE PROTECTION
PROTECTIVE HELMET
PROTECTIVE GLASSES OR FULL FACE PROTECTION
WEAR HAND PROTECTION
WARNING: Improperly maintaining the JS including the Honda engine or failing to correct a problem before
operation could cause a malfunction resulting in a serious injury. Always perform a pre-operation inspection before
each operation and correct any problem. See Honda Engines Owner's Manual.
5.2 Check the condition of the Honda engine. See the section titled "Before operation - is your
engine ready to go?" in the Honda Engines Owner's Manual.
WARNING: Exhaust gas from gasoline engines contains dangerous carbon monoxide. Breathing it can cause
unconsciousness and even kill you. Always operate gasoline engine machines in a well-ventilated area. Do not
operate in areas where exhaust fumes could accumulate without wearing appropriate respiratory protection.
Consult your employer and OSHA regarding use of appropriate respirator for dangerous carbon monoxide
gases. See Figure 7.
EEnnggiinneeeexxhhaauussttccoonnttaaiinnss
ppooiissoonnoouussccaarrbboonn
mmoonnooxxiiddeeggaass..Breathing
it could cause death.
Operate machine in well
ventilated area.
FFiigguurree77--WWaarrnniinnggllaabbeell--eennggiinneeeexxhhaauussttccoonnttaaiinnssccaarrbboonnmmoonnooxxiiddeeggaass1111
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Commu nication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
Flying debris
and loud noise
hazards. Wear
ear and eye
protection
Wear hand
protection
WARNING: Exhaust gas from gasoline engines contains dangerous
carbon monoxide. Breathing it can cause unconsciousness and even kill
you. Always operate gasoline engine machines in a well-ventilated area.
Do not operate in areas where exhaust fumes could accumulate without
wearing appropriate respiratory protection. Consult your employer and
OSHA regarding use of appropriate respirator for dangerous carbon
monoxide gases. See Figure 2.
AVOID STATIC ELECTRICITY RISK WHEN FUELING
WARNING: Ultra-Low Sulfur Diesel (ULSD) poses a greater static ignition
hazard. Consult with your fuel or fuel system supplier to ensure the deliv-
ery system is in compliance with fueling standards for proper grounding
and bonding practices. Maintaining a discharge strap must be connect-
ed to any U.S.SAWS vacuum at all times when equipment is being used.
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Comm unication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
Engine exhaust contains poi-
sonous carbon monoxide gas.
Breathing it could cause death.
Operate machine in well venti-
lated area.
Wear proper electrostatic
grounding equipment at all
times. Static discharge during
fueling can cause explosion
Figure 2 - Warning label - engine exhaust contains carbon monoxide gas 11
5.3 Observe the condition of your work environment. Walk over
area work area and look for hazards. Make sure the work environment is
safe and meets all safe-working conditions discussed in section 4, Rules
for safer operation.
5.4 Obtain MATERIAL SAFETY DATA SHEET (MSDS) for all work
surface materials. This includes primers, all coatings, adhesives, tile and
crack lling materials, etc. Do not attempt to cut, clean out, or remove
material without MSDS information. Consult MSDS sheet for health haz-
ards information. Be aware that some materials are explosive as a dust
WARNING: The JS SERIES SAWS maximum blade operating speed is
5400 rpm as labeled on the blade guard. Use only dry cut diamond
blades rated higher than 5400 rpm safe operating speed. Do not use
a blade rated for less than 5400 rpm. Do not use a blade that is not a
dry cut diamond blade. Using a non dry cut diamond blade or a blade
rated below 5400 rpm could result in severe blade failure, personal
injury or death. See Figure 8 and Figure 9. Never cut material for which
the blade was not designed. Check blade manufacturer’s guidelines on
material to be cut. Never operate a blade in the wrong rotation direc-
tion. Verify blade direction when changing blades. The JS is designed
to cut in a straight line. Never attempt to cut any pattern or follow any
joint that is not a straight line.
Surface Prep
Division
P: 877-817- 6687 F: 813-621-7125
Visit us at www.ussaws.com
[email protected]
5.0 PRE-OPERATION CHECKLIST

PRE-OPERATION CHECKLIST
5400 MAX. RPM
Figure 3 - Max rpm label - maximum blade speed
5.5 Choose the proper dry cut diamond blade for the application,
speed and material to be cut. See Figure 9.
7
55..33 Observe the condition of your work environment. Walk over area work area and look for hazards. Make
sure the work environment is safe and meets all safe-working conditions discussed in section 4, Rules
for saferoperation.
55..44 Obtain MATERIAL SAFETY DATA SHEET (MSDS) for all work surface materials. This includes primers,
all coatings, adhesives, tile and crack filling materials, etc. Do not attempt to cut, clean out, or remove
material without MSDS information. Consult MSDS sheet for health hazards information. Be aware that
some materials are explosive as a dust
WARNING: The JS SERIES SAWS maximum blade operating speed is 5400 rpm as labeled on the blade guard.
Use only dry cut diamond blades rated higher than 5400 rpm safe operating speed. Do not use a blade rated
for less than 5400 rpm. Do not use a blade that is not a dry cut diamond blade. Using a non dry cut diamond blade
or a blade rated below 5400 rpm could result in severe blade failure, personal injury or death. See Figure 8 and
Figure 9. Never cut material for which the blade was not designed. Check blade manufacturer's guidelines on
material to be cut. Never operate a blade in the wrong rotation direction. Verify blade direction when changing
blades. The JS is designed to cut in a straight line. Never attempt to cut any pattern or follow any joint that is not a
straight line.
55440000MMAAXX..RRPPMM
FFiigguurree88--MMaaxxrrppmmllaabbeell--mmaaxxiimmuummbbllaaddeessppeeeedd
5.5
Choose the proper dry cut diamond blade for the application, speed and material to be cut. See
Figure 9.
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FFiigguurree99--WWaarrnniinnggllaabbeell--uusseeoonnllyyddiiaammoonnddbbllaaddeess
55..55 Clearly mark all intended cut areas with straight paint or chalk lines.
55..66 Verify that the lever is disengaged or released, and the Honda engine switch and fuel valve lever are
in the OFF position. Make sure blade is completely stopped.
CAUTION: Running the JS generates heat in the engine, blade and blade guard. Do not touch these
components without wearing proper heat protecting work gloves.
12
Figure 4 - Warning label - use only diamond blades
5.6 Clearly mark all intended cut areas with straight paint or chalk
lines.
5.7 Verify that the lever is disengaged or released, and the Honda
engine switch and fuel valve lever are in the OFF position. Make sure
blade is completely stopped.
CAUTION: Running the JS generates heat in the engine, blade and blade
guard. Do not touch these components without wearing proper heat pro-
tecting work gloves.
5.8 Remove bolt in the blade guard holding bracket. Hold the blade
guard rmly and raise guard up into the holding bracket. Reinsert bolt in
the blade guard holding bracket and tighten nut.
5.9 Remove both blade change wrenches from the JS handle. Install
dry cut diamond blade. See section 8.1 for detailed instructions on remov-
ing and installing blades. Inspect diamond blades for damage at least
twice daily and before each use. Damaged diamond blades are hazardous
and should never be used on a JS. See Figure 5.
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Commu nication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
TO AVOID INJURY.
Always inspect saw blades be-
fore use. Replace all cracked
or damaged blades.
Figure 5 - Warning label - inspect blades before use
.
POINTER WHEEL
ADJUST
INTENDED C
55..77 Remove bolt in the blade guard holding bracket. Hold the blade guard firmly and raise guard up into the
holding bracket. Reinsert bolt in the blade guard holding bracket and tighten nut.
55..88 Remove both blade change wrenches from the JS handle. Install dry cut diamond blade. See section
8.1 for detailed instructions on removing and installing blades. Inspect diamond blades for damage at
least twice daily and before each use. Damaged diamond blades are hazardous and should never be
used on a JS. See Figure 10.
TTooaavvooiiddiinnjjuurryy::
AAllwwaayyssiinnssppeeccttssaaww
bbllaaddeessbbeeffoorreeuussee..
RReeppllaacceeaallllccrraacckkeeddoorr
ddaammaaggeeddbbllaaddeess..
55..99
55..1100
55..1111
55..1122
FFiigguurree1100--WWaarrnniinnggllaabbeell--iinnssppeeccttbbllaaddeessbbeeffoorreeuussee
Replace the wrenches in the holding bracket on the handle. Tighten the wrench-clamping knob.
Check the belt tension each day before starting work. Check after the first hour of operation if the JS or
belt is new. See section 8.3 for detailed instructions on checking and adjusting the belt tension.
Move the front and rear pointer arms down towards the ground. Turn the height adjustment handle
clockwise until the blade touches the ground. Now turn the adjustment handle counter-clockwise one
complete 360° turn. This will raise the blade slightly off the ground.
Using the marked chalk line or any straight line on the ground, align the blade with the line. On the
pointer wheels, loosen the adjustment nuts and align the wheels with the same chalk line. Push the JS
along the line to verify the alignment is straight. See Figure 11 and Figure 12.
MENT NUTS
UT LINE
FFiigguurree1111--PPooiinntteerrwwhheeeellaaddjjuussttmmeenntt
13
5.10 Replace the wrenches in the holding bracket on the handle.
Tighten the wrench-clamping knob.
5.11 Check the belt tension each day before starting work. Check
after the rst hour of operation if the JS or belt is new. See section 7.3
for detailed instructions on checking and adjusting the belt tension.
5.12 Move the front and rear pointer arms down towards the
ground. Turn the height adjustment handle clockwise until the blade
touches the ground. Now turn the adjustment handle counter-clock-
wise one complete 360° turn. This will raise the blade slightly off the
ground.
5.13 Using the marked chalk line or any straight line on the ground,
align the blade with the line. On the pointer wheels, loosen the adjust-
ment nuts and align the wheels with the same chalk line. Push the JS
along the line to verify the alignment is straight. See Figure 16 and
Figure 12.
Figure 6 - Pointer wheel adjustment
Figure 7 - Alignment of
blade and the pointer
wheels -
JS bottom view
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Adjustment Nut
Cut Line

PRE-OPERATION CHECKLIST
CAUTION: The blade depth is approximate and not exact. Many vari-
ables affect the exact blade depth such as the exact diameter of a worn
diamond blade. If an accurate depth must be cut, install the blade to be
used with the engine in the OFF position. Place the JS in a secure posi-
tion that allows the blade to overhang and be visibly measured at full
blade depth. An example would be blocking the wheels with the engine
in the OFF position and lowering the JS blade along side a street curb.
This will allow a measurement from the bottom of the blade to the top of
the curb.
5.14 Hold the blade guard rmly and remove the bolt in the blade
guard holding bracket. Lower the blade guard down until the 2” caster
wheel touches work surface. Reinsert bolt in the blade guard holding
bracket for future use.
5.15 Make sure the blade guard caster wheel and white dust
urethane seal at the blade guard base are rmly touching the work
surface. See section 6 for detailed instructions on adjusting the dust
urethane seal and urethane seal guard caster wheel.
WARNING: Breathable silica may be generated by use of this product.
Silica can cause severe and permanent lung damage, cancer, and other
serious diseases. Do not breath the dust. Do not rely on your sight
or smell to determine if the dust is in the air. Silica may be in the air
without a visible dust cloud. If air monitoring equipment for silica is not
provided by your employer at your work site, you MUST wear appropriate
respiratory protection when using or servicing the machine. Consult your
employer and OSHA regarding the appropriate respiratory protection.
5.16 Slide the 3” diameter vacuum hose over the connector and
tighten the worm drive hose clamp. Pull rmly on the hose to verify the
connection will not slide off.
5.17 Check for missing or loose bolts. Tighten loose bolts and
replace missing bolts before operating machine. Verify that belt and
blade guards are in place. Never operate a JS without guards in place.
5.18 WARNING: If you can see the drive belt or diamond blade, the
guards are not in place. Never operate a JS without guards in place. The
proper position for the belt guard is bolted with four bolts to the chassis.
The proper position for the blade guard is down with the white guard
dust brush touching the horizontal surface.
5.19 Dress properly. Wear ear and eye protection. See sections 3.0
8
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Commu nication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
Rotating blade hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Figure 9 - Warning label - do not
operate with guard up
WARNING
Read and understand
operator's manual before
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1haz ard Commun ication Sywems . LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
AVOID
INJURY.
Do NOT operate
with guard re-
moved. Replace
guard before op-
erating machine.
Figure 8 - Warning label -
do not operate with guard
removed
WARNING
Read and understand
operator's manualbefore
using this machine.
Failure to follow operating
Instructions could result
in injury or damage to
equipment.
Use only diamond blades (steel
centered diamond cutting-off
wheels) with this machine. RPM
rating on blade must exceed
machine max rpm rating. The use
of any other blade could result in
death or serious injury.
5400 MAX. RPM
Avoid injury.
Do NOT operate with
guard removed.
Replace guard before
operating machine.
C1h azard Commu nication Syw ems. LLLLCCMMOO--774466--00224411
To avoid injury:
Always inspect saw
blades before use.
Replace all cracked or damaged
blades.
Rotating blade
hazard.
Do NOT operate with
guard up.
Keep hands and feet
away.
Engine exhaust
contains poisonous
ccaarrbboonnmmoonnooxxiiddeeggaass..
Breathing it could cause
death.
Operate machine in well
ventilated area.
This product can expose you to chemicals, including NICKEL. When used, serviced, cleaned, or maintained equipment could generate particulates
that contain chemicals, including silica. These chemicals are known to the state of California to cause cancer and birth defects or other
reproductive harm. For more information, visit www.P65Warnings.ca.gov
4.0 Rules for safer operation
Flying debris
and loud noise
hazards. Wear
ear and eye
protection
Wear appropriate clothing
Figure 10 - Warning label - wear proper clothing, ear and eye protection
WARNING: Recommended accessories for this tool including blades are
listed in this manual or are available by calling customer service. The use of
any other attachment or accessory might be hazardous
5.20 JS premium dry cut diamond blades, medium bond
Table 6 - Dry cut diamond blade list
(* All blades listed are designed with JS drive pin holes and 1”
diameter arbor holes.)
JOINT WIDTH (INCHES)
JOINT WIDTH (INCHES)
JOINT WIDTH (INCHES)
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DEPTH OF
JOINT
DEPTH OF
JOINT
DEPTH OF
JOINT
Up to 2”
Deep
Up to 2”
Deep
Up to 2”
Deep
Up to 3”
Deep
Up to 3”
Deep
Up to 3”
Deep
8”
8”
8”
10”
10”
10”
.095
.095 x 8
.125 x 8
.187 x 8
.095 x 8
.125 x 8
.187 x 8
.187 x 8
.250 x 8
.375 x 8
.187 x 8
.250 x 8
.375 x 8
.187 x 10
.250 x 10
.375 x 10
.187 x 10
.250 x 10
.375 x 10
.375 x 8
.500 x 8
.
.375 x 8
.500 x 8
.375 x 10
.500 x 10
.375 x 10
.500 x 10
.095 + .060
spacer x 8
.095 + .060
spacer x 8
.095 + .060
spacer x 10
.095 + .060
spacer x 10
.095 x 10
.125 x 10
.187 x 10
.095 x 10
.125 x 10
.187 x 10
.187
.187
.375
.375
.095 +
.095
.095
.125 .250
.250
.500
.500 plus .125
.187 .375
.375
spacers
spacers
.187
HARD HARD
HARD
HARD
HARD
HARD
HARD
MEDIUM
SOFT
MEDIUM
SOFT
MEDIUM
SOFT
MEDIUM
SOFT
MEDIUM
SOFT
MEDIUM
SOFT
MEDIUM
SOFT
MEDIUM
SOFT
SIZE
SIZE
SIZE
CLEANINGREMOVALCUTTING
1/8 - 3/16
1/8 - 3/16
1/8 - 3/16
3/16 - 3/8
3/16 - 3/8
3/16 - 3/8
3/8 - 1/2
3/8 - 1/2
3/8 - 1/2
1/2 or more
1/2 or more
1/2 or more

OPERATION
The U.S.SAWS JS -Series saws are designed for the purpose of:
• cleaning out existing control joints
• Removing existing joint ll material
• Cutting concrete to remove deteriorated concrete for joint
rebuilding
Each one of these tasks is unique in nature and require different blade
congurations.
Cleaning out existing joints:
After the early entry saw makes it’s cut, and the slab cures and construc-
tion commences, there is usually a lot of debris and dust in the exposed
control joint. This debris and all the concrete dust / dry slurry needs to be
removed, and the sidewalls of the joint need to be prepared to allow prop-
er placement and adhesion of the joint ll material. The dust and debris
are very abrasive, and the best choice of blade is a U.S.SAWS supreme
grade blade of the appropriate width. The width should be determined
by the actual width of the joint and the engineering specications for the
joint. Keep in mind, as the slab contracts during the curing process; some
joints might be wider than others. U.S.SAWS advises that the contract al-
ways has several widths of blades on hand at all times. US Saws provides
blades in the following sizes and widths:
8, 10 inches in diameter
.095, .110, .125, .187, .250, .375, .500 inches in width.
The blade should t snugly and touch both sides of the joint. The joint
cleanout process will be signicantly slower if the joint is being “over cut”
in size, width, and or depth. In some cases, more than one blade can be
placed side by side to achieve a specic width. Example: (2) .110 thick-
ness blades will achieve an overall cutting width of .220.
Joint ll Removal:
There are typically three types of joint ll materials removed with this
machine.
• Epoxy (semi-rigid)
• Polyurea
• Polyurethane
Joint ll removal can be a difcult task and is highly dependent on a
variety of variables.
Epoxy joint ll is, in most cases, able to be cut with a U.S.SAWS Supreme
Grade Diamond Blade. The blade width should be as close as pos-
sible to the width of the existing lled joint. The depth of cut should be
determined by the engineering standard of the intended use of the oor.
Example: Hard wheel and heavy forklift trafc will usually require a full
depth cut, soft pneumatic wheel trafc or strictly foot trafc may only
require partial depth removal. Consult the joint ll manufacturer for best
practices with the specied material.
Polyurea is much more difcult to cut than epoxy and will typically require
a U.S.SAWS Tigertooth Blade or U.S.SAWS PCD Poly Shredder Blade.
• Tigertooth blades are meant to remove joint ll material but
NOT to over cut a joint in width or depth.
*Care should be taken by the operator to not force the saw through the
polyurea, which will create excessive heat and slow performance.
• PCD Poly shredder blades are designed to be used for “cap and
ll” projects where only about ½ inch of depth is required.
Bottoming out this blade in the joint will destroy the
PCD segments. 9
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6.0 OPERATION
Polyurethane is the typical material used in waterproong of parking
garages, bridge joints and cold joints on large slabs like airport tarmac.
Removal of this material can be most efciently achieved by using a thin
US Saws Supreme Concrete Blade and making a cut on the edge of the
surface where the polyurethane meets the concrete. The inside of the
blade will be touching the polyurethane, and the outside edge will be
touching concrete. Most of these applications have a foam backer rod
in the bottom of the joint, and cutting both sides will allow easy manual
removal of the rest of the joint ll material being removed.
Cutting Concrete
While cutting concrete is easily achievable with the U.S.SAWS JS-Series
saws, please make sure your expectations are realistic in conjunction
with the task being performed. Some factors of performance are:
• More depth equals less cutting speed.
• More Blade Width equals less cutting speed
• Up-cut saws are slower cutting than Down-cut saws
• This saw should not be expected to have the same cutting
speed as a 35 hp pro saw.
• Dry cutting is typically slower than wet cutting. This saw is
designed to cut dry with a vacuum system attached at all times.
Knowing the above information can help keep performance expectations
reasonable.
Concrete slabs can be very different from one job to the next, and aggre-
gate hardness can vary dramatically based on regional or specied raw
materials in the concrete mix. Please refer to the aggregate hardness
chart as a general guide. In extreme cases, a core sample of the con-
crete may need to be taken and analyzed. (This is common in the profes-
sional concrete cutting industry) Example: Some concrete has specied
granite or river rock aggregate that can make cutting it very difcult.
Quick Guide:
Soft Concrete: If blades are wearing out quickly, the concrete is likely very
abrasive, and a Hard Bond blade should be used.
Medium concrete (most common): Any of the U.S.SAWS Supreme, Pre-
mium or Standard blades should work.
Hard Concrete: Hard concrete is the concrete that gives most people
problems. The symptoms below will give you an indication that the blade
being used is too hard, and the operator should switch to a “softer bond”
blade.
• The blade is heating up and looks like it has burn marks
on it.
• The blade is cutting for a short distance and then stops
cutting.
• There are excessive sparks being generated by the blade

OPERATION
6.1 Follow all pre-operating instructions in section 5.0.
6.2 Turn handle counterclockwise until jack assembly upper arm is
above the highest depth slot. This will allow proper clearance between the
work surface and the blade tip.
WARNING: Never attempt to start the engine with the diamond blade
inserted in a joint or previous cut. The blade will turn as soon as the JS is
started. This could damage the blade or cause the JS to jump backwards.
6.3 Turn on the vacuum system.
6.4 Move the Honda engine fuel valve lever to the ON position.
6.5 To start a cold engine, move the choke lever to the CLOSED posi-
tion. To restart a warm engine, leave the choke lever in the OPEN position.
6.6 Move the throttle lever away from the SLOW position, about 1/3
of the way toward the fast position.
6.7 Turn the engine switch to the ON position.
6.8 Stand on the side of the JS opposite the blade guard. With the
left hand, pull the starter cord grip lightly until you feel resistance, then
pull briskly. Return the starter grip gently. Repeat until engine starts. If
engine does not start,
6.9 If the choke lever has been moved to the CLOSED position to
start the engine, gradually move it to the OPEN position as the engine
warms up.
6.10 While continuing to squeeze the lever, switch the right hand with
the left hand. In other words, your left hand will now be on the left handle
grip and squeezing the lever. This will free your right hand. Warren to pro-
vide new copy.
6.11 Using your left hand on the handle pull back and downwards on
the handle to reduce the weight on the front wheels while at the same
time using your right hand to release the depth stop and gently lower the
lifting handle the blade into the joint.
6.12 Cut with the machine for a few inches. Pull back on the handle
with your left hand in the same way as 6.11 above while at the same pull-
ing back on the lifting hand, then release the lock so the machines rest
out of the cut then turn the machine off.
6.13 Measure the depth of cut and adjust as necessary.
WARNING: Do not twist the blade in the cut. Never attempt to cut any
pattern or follow any joint that is not a straight line. Do not force the blade
forward. These actions could damage the blade and JS unit.
6.14 Proceed to clean out the joint as required. Remove blade from
the cut as described in 6.12.
6.15 In the event of an emergency related to the blade, step to the left
of the machine and turn the Motor OFF if possible.
9
Figure 11-JS SERIES SAWS in cutting operation
(Operator wearing personal protective equipment
and dust collector are not shown)
WARNING: Beware that after releasing the lever, the blade will continue
spinning for several seconds. Keep a rm hold on the handle grips and
maintain control of the machine until the blade completely stops.
6.16 For normal shut down. Pull the saw blade out of the cut by pull-
ing back on the handle with your left hand, while at the same pulling back
on the lifting handle, then release the lock so the machines rest out of the
cut then turn the machine off.
6.17 For any other emergency, such as re, use the normal proce-
dure above, 6.16, to pull the saw blade out of the cut.
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