U.S.SAWS Heavy Duty Dust Buggy User manual

U.S. English
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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
04-06-2022
U.S.SAWS HEAVY DUTY DUST
BUGGY OPERATING MANUAL

INTRODUCTION & SPECIFICATIONS
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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.
Table of Contents & Introduction ..................................................... 2
Symbols & Decals ................................................................... 3
Safety Instruction ................................................................... 4 - 5
Pre-Operation Checklist ..............................................................6 - 8
Operation ........................................................................ 9 - 10
Parts Breakdown ............................................................ 11 - 13
Assembly ............................................................................... 14 - 15
Related Products ..................................................................... 16
Warranty & Service ............................................................. 17 - 18
1.0 INSTRUCTIONS FOR USE OF MANUAL SECTIONS
Section Page
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 lim-
ited 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.
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 U.S.SAWS Heavy Duty Dust Buggy Machine & to instruct you in safety
practices for dealing 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.
The Heavy Duty Dust Buggy is designed to clean-out existing control
joints before lling, or to remove failing or deteriorated epoxy, polyurea, or
polyurethane joint llers. The joint clean-out saw cuts up to 2” deep with
an 8” blade. Its up-cut rotation allows debris to be removed from joints as
your moving forward. The polyurethane wheels help the Dust Buggy track
perfectly straight. This model is made with a heavy duty cast aluminum alloy
chassis to hold up the most abusive environments.
Production rates vary but a good operator can easily clean out 10,000 linear feet
of new, unlled joints in an 8-hour shift.
MADE IN USA 25 Year Warranty on Chassis
Model Heavy Duty Dust Buggy
Part Number SX13590
Grinder Make/ Model Metabo W24-230
Output Power 15 Amp Electric
Max RPM 6,600
Power Requirements 115V, 60Hz
Max Cutting Depth 2”
Blade Diameter 7” or 8”
Dry Diamond

SYMBOLS & DECALS
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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.
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For Safe Operation
You must be qualied for safe operation of the U.S.SAWS Heavy Duty Dust
Buggy 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 prac-
tice to point out & explain 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 in-
cluded from other manufacturers and organizations. Learn the applica-
tions 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 oper-
ate in areas where exhaust fumes could accumulate without wearing
appropriate respiratory protection.
4
Consult your employer and OSHA 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 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.
4.19 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.
4.20 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.
4.21 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.
4.22 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.
4.23 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.
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4.0 SAFETY INSTRUCTIONS

SAFETY INSTRUCTIONS
5
4.24 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.
4.25 DO NOT FORCE SAW.
The saw will do the job better and safer at the rate for which it was de-
signed.
4.26 OBTAIN SAFETY DATA SHEET (SDS) 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 SDS
information. Consult SDS sheet for hazards information. Be aware that
some materials are explosive as a dust.
4.27 DO NOT OVERREACH.
Keep proper footing and balance at all times.
4.28 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.
4.29 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.
4.30 STAY ALERT.
Watch what you are doing. Use common sense. Do not operate machine
when you are tired or fatigued.
4.31 DO NOT USE DRUGS, ALCOHOL, MEDICATION.
Do not operate machine while under the inuence of drugs, alcohol,
or any medication.
4.32 KEEP THE RIGHT PARTS IN THE RIGHT POSITIONS.
Do not operate machine with parts missing or improperly mounted.
4.33 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.
4.34 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.
4.35 NEVER TOUCH THE MOVING PARTS.
Never touch moving parts such as blades, belts and others.
4.36 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.
4.37 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.
4.38 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.
4.39 LOAD AND UNLOAD SAFELY.
Use proper heavy lifting procedures. Read & understand manuals before
loading & unloading.
4.40 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.
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.
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PRE-OPERATION CHECKLIST
Figure 1 - Warning label - read and understand manual
5.1 Start by reading the entire Metabo Grinder 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 Heavy Duty Dust Buggy operations and maintenance manual.
Get familiar with the machine’s parts. See Figure 1 through Figure
32.
WARNING: Improperly maintaining the Heavy Duty Dust Buggy
including the Metabo grinder 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.
5.2 Observe the condition of your work environment. Walk over
area work area and look for hazards. Make sure the work environ-
ment is safe and meets all safe-working conditions discussed in
section 4, Rules for safer operation.
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
Wear Head Protec-
tion, breathing pro-
tection, and the use
of hearing protection
is mandatory
Flying debris
and loud noise
hazards. Wear
ear and eye
protection
Wear hand
protection
5.3 Obtain SAFETY DATA SHEET (SDS) for all work surface materi-
als. This includes primers, all coatings, adhesives, tile and crack lling
materials, etc. Do not attempt to cut, clean out, or remove material with-
out SDS information. Consult SDS sheet for health hazards information.
WARNING: The U.S.SAWS Heavy Duty Dust Buggy maximum blade
operating speed is 6600 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 6600 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 U.S.SAWS Heavy
Duty Dust Buggy is designed to cut in a straight line. Never attempt to
cut any pattern or follow any joint that is not a straight line.
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5.0 PRE-OPERATION CHECKLIST
6600 MAX. RPM
Figure 2 - Max rpm label - maximum blade speed
5.4 Choose the proper dry cut diamond blade for the application,
speed and material to be cut. See Figure 9.
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Figure 2 - Warning label - use only diamond blades
5.5 Clearly mark all intended cut areas with straight paint or
chalk lines.
CAUTION: Running the Heavy Duty Dust Buggy generates heat in the
engine, blade and blade guard. Do not touch these components with-
out wearing proper heat protecting work gloves.

PRE-OPERATION CHECKLIST
7
5.6 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 Heavy Duty Dust
Buggy.
See Figure 10.
TO AVOID INJURY.
Always inspect saw blades be-
fore use. Replace all cracked
or damaged blades.
Figure 3 - Warning label - inspect blades before use
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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 Heavy Duty Dust
Buggy in a secure position 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 Heavy Duty
Dust Buggy blade along side a street curb. This will allow a measure-
ment from the bottom of the blade to the top of the curb.
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.
5.7 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 Heavy Duty Dust Buggy with-
out guards in place. See Figure 14 and Figure 15.
5.8 WARNING: If you can see the drive belt or diamond blade, the
guards are not in place. Never operate a Heavy Duty Dust Buggy 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. See Figure
14 and Figure 15.
5.9 Dress properly. Wear ear and eye protection. See sections 4.3
through 4.7. See Figure 16
R
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a
Rotating blade hazard.
Do NOT operate with guard up.
Keep hands and feet away.
Figure 4 - Warning label - do not operate with guard
up
AVOID INJURY.
Do NOT operate with guard removed.
Replace guard before operating
machine.
Figure 3 - Warning label - do not operate with
guard removed
Flying debris
and loud noise
hazards. Wear
ear and eye
protection
Wear appropriate clothing
Figure 5 - Warning label - wear proper clothing, ear and eye protection
5.10 WARNING: TO PREVENT SERIOUS INJURY DO NOT OPERATE SAW
WITHOUT PROPER TRAINING.

PRE-OPERATION CHECKLIST
8
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
5.11 Heavy Duty Dust Buggy premium dry cut diamond blades, medium
bond
Table 6 - Dry cut diamond blade list
(* All blades are listed 5/8-7/8 arbor holes)
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CLEANING
DEPTH OF
JOINT SIZE JOINT WIDTH (INCHES)
1/8 - 3/16 3/16 - 3/8 3/8 - 1/2 1/2 or more
Up to 2”
Deep 8”
.095, .125,
.187
.187, .250,
.375
.375, .500 .095 +
spacers
HARD HARD HARD HARD
REMOVAL
DEPTH OF
JOINT SIZE
JOINT WIDTH (INCHES)
1/8 - 3/16 3/16 - 3/8 3/8 - 1/2 1/2 or
more
Up to 2”
Deep 8”
.095 x 8
.125 x 8
.187 x 8
.187 x 8
.250 x 8
.375 x 8
.375 x 8
.500 x 8
.095 + .060
spacer x 8
MEDIUM MEDIUM MEDIUM MEDIUM
CUTTING
DEPTH OF
JOINT SIZE
JOINT WIDTH (INCHES)
1/8 - 3/16 3/16 - 3/8 3/8 - 1/2 1/2 or
more
Up to 2”
Deep 8”
.095 x 8
.125 x 8
.187 x 8
.187 x 8
.250 x 8
.375 x 8
.375 x 8
.500 x 8
.095 + .060
spacer x 8
SOFT SOFT SOFT SOFT

OPERATION
9
Figure 6 - Heavy Duty Dust Buggy SAWS blade depth setting
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.
6.12 This machine is intended to be used with a vacuum with 200cfm
or more at all times. There is no instance where this machine should be
used without a vacuum or with water.
6.13 Determine how deep you want the blade in the joint. An 8”
blade will get a maximum of 2” depth and a 7” blade will get a maximum
of 1.5” depth.
6.14 The accurate way: Lay the saw on its side in the same position
you would to change the blade. Lower the blade until it is approximately
where you want it. Measure with a tape measure or ruler to conrm the
depth you want. Move the Brass “depth stop” thumb screw into the hole
that coincides with the depth adjustment to prevent the blade from being
lowered further than you want it. The “ne adjustment” knob on the left
side of the blade depth adjustment assembly can be screwed in or out to
make small adjustments to compensate for blade wear.
6.15 The quick way: With the saw “off”, lower the blade on a at
surface lifting the front wheels off the ground. The distance between the
bottom of the wheel and the ground will be the approximate depth of cut
+/- 1/8”.
WARNING: It is important to verify the depth of cut immediately after start-
ing, and periodically during the job. If you are cutting deeper than you
panned, you will use a lot more joint ll material than you had intended.
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SETTING THE BLADE DEPTH
6.1 Follow all pre-operating instructions in section 5.0.
6.2 The machine should be unplugged from electricity before start-
ing this operation. The blade will turn as soon as the Heavy Duty Dust
Buggy is turned on.
WARNING: Never attempt to start the machine with the diamond blade
inserted in a joint or previous cut. The blade will turn as soon as the Heavy
Duty Dust Buggy is started. This could damage the blade or cause the
Heavy Duty Dust Buggy to jump backwards.
BLADE INSTALLATION:
6.3 Set the blade depth adjustment handle to the lowest point.
(See Figure 9)
6.4 Open the blade guard cover.
6.5 Loosen, counterclockwise, the blade nut and remove it along
with one of the two spacers. The inner arbor nut and one spacer will
remain in place.
WARNING: If the blade you are using has a “5/8-7/8” knockout (brass
bushing), remove it so that the arbor of the blade is set at 7/8”
6.6 Ensure the proper direction of the blade being used. This ma-
chine rotates the blade in an up-cut rotation which is counterclockwise.
6.7 Place the blade on top of the spacer that is already on the ma-
chine and line up the arbor hole.
6.8 Place the Outer blade spacer on top of the blade and line up the
arbor hole.
6.9 Insert the shank of the Blade nut through the spacers and blade
and thread onto the shaft of the grinder and tighten the nut with moderate
force. Over tightening will cause problems when it’s time to change the
blade.
6.10 Raise the blade depth adjustment to it’s highest point, close
the blade guard cover plate. 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 Heavy Duty Dust Buggy unit.
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 Heavy Duty Dust
Buggy unit.
6.0 OPERATIONS
CLEANING OUT EXISTING JOINTS:
VACUUM HOSE ATTACHMENT:
6.11 The vacuum port is designed to be used with the 2” cuff that is
standard on most industrial vacuums in the industry. The hose is meant to
have a snug t to prevent it from falling off during normal operation. Some
hoses may require tape.

OPERATION
6.16 Open Joint: With an un-lled control joint where it only needs to
be cleaned of debris, it is better to line the pointer up with the left edge of
the joint so that the pointer wheel rides along on the surface of the oor.
If the pointer wheel is directly in the joint, it can get stuck and make it dif-
cult to move the machine forward.
6.17 Filled Joint: The pointer wheel can be lined up directly in the cen-
ter of the joint or off to the side edge. It is up to the operator to determine
what they are more comfortable with.
6.18 Adjusting the pointer: Part # 49 in the parts breakdown is a
“shaft collar clamp.” To adjust the pointer, loosen the allen bolt, rotate the
shaft collar clamp forward to move the pointer to the right, and rotate it
backward to move the pointer to the left. Once the pointer wheel is in the
desired position, re-tighten the allen bolt. One of the easiest ways to set
the pointer is, with the saw off, put the blade down into a joint and move
the saw back and forth a few feet while observing where the pointer wheel
is in conjunction to the joint. This will show if the pointer is in a good loca-
tion or if it needs adjustment.
6.19 Open Joint: Lower the blade to the desired depth into the open
joint with the saw “off.” Move the saw forward and backward to align the
blade with the joint. Carefully, and without moving the position of the
saw, raise the blade just above the surface. With the other hand, turn the
saw on and lock the trigger. Slowly lower the blade into the joint. Once
the blade is at it’s full depth, use two hands and guide the saw through
the joint. The blade will follow the path of least resistance and therefore
follow the joint with minimal effort. Tip: There may be some dust escaping
through the front of the joint upon entry or if the joint is relatively clean
to begin with. If this is the case and total dust control is necessary, it
may be helpful to sweep some dry sand into the joint before running the
saw through it. The sand will block the dust and direct it upward into the
vacuum port and the blade will easily remove the sand.
6.20 Filled Joint: Line the blade up with the joint ll material to be
removed, turn the saw on, and slowly lower the blade into the cut. The
saw will be forced back toward the operator until the blade is at full depth.
Do not force the saw forward. Let the rpm of the saw stay high and let the
blade do the cutting. Forcing the blade will cause excessive heat and may
make cutting slower. The saw must be guided in an accurate and skillful
manner as to keep the saw in the joint ll material and not wander off into
the concrete. This is especially important when removing polyurea.
6.21 Finishing a cut: When the operator gets to a wall or other termi-
nation point, with the blade still in the “down” position, shut the saw off
and wait for the blade to stop. Retract the blade and move to the next cut
and repeat the process. It is not recommended to tip the saw back on it’s
rear wheels while the saw is still on and the blade is spinning. This is espe-
cially important on polished concrete oors to prevent accidental damage
to the oor surface.
10
6.22 Align bolt holes for Dust Buggy Arm in the most vertical position.
Make sure the Adjustment Lever is in position.
6.23 Attach both 3/8”-16 bolts.
6.24 Attach Clamp Plate.
6.25 Attach 3/8” washers and tighten Lock nuts rmly.
6.26 Attach 3/8” Shoulder Bolt through Adjustment lever and spacer.
Then tighten rmly to motor plate.
6.27 Use the shortest, heaviest gauge extension cord possible for
your job. The longer the cord, the more power will be lost. The
thinner the cord, the more heat will be generated and will even
tually end up damaging the motor.
6.28 Keep the machine clean.
6.29 Don’t get the machine wet
6.30 Clean dust out of the threads of the blade nuts before
tightening.
6.31 Periodically check nuts and bolts for tightness
6.32 Familiarize yourself and your employees with the machine and
it’s intended manner of use before using it.
6.33 Bring a variety of thickness of blade with you to every job.
6.34 Bring a good set of tools to every job.
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LINING UP THE BLADE WITH THE JOINT/POINTER ADJUSTMENT
OPERATING THE SAW:
OTHER INFORMATION:

PARTS BREAKDOWN
7.0 Heavy Duty Dust Buggy Parts Breakdown
11
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PARTS BREAKDOWN
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PARTS BREAKDOWN
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ASSEMBLY
14
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8.2 Your Dust Buggy requires the installation of the handle and
pointer before it is ready for use.
Recommended tools:
• Ratchet and Sockets
• Wrench
• Allen Keys
• Pliers
8.1 Install pointer as shown
8.1.1 We recommend that the pointer be adjusted so
that it is next to the crack to be cut, not in it.
8.1.2 This makes it easier to see if one is cutting
straight while keeping the pointer from being affected by
debris in the crack.
8.3 Install handle as shown
The Dust Buggy handle comes pre-assembled and simply needs to be
bolted to the rolling chassis.
8.3.1 Begin with bolting the main handle to the chassis. Make sure
to place the supplied bent handle washer opposite to the chassis as
shown.
8.3.2 Follow by removing the bolt from the clamp weldment and then
thread it through the handle adjustment lever.
8.3.3 Insert the free loop of the handle spring through the hole in the
chassis. We recommend using a pair of pliers to aid this process.
8.3.4 Cycle the height adjustment mechanism to ensure that
everything is working correctly.
8.0 ASSEMBLY

ASSEMBLY
15
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8.4.1 The door on the side of the Dust Buggy locks the
“shoe” into position and provides access to the blade nut.
8.4.3 The Dust Buggy is supplied with two (2) large blade
anges. Make sure to sandwich blade between them.
8.4.4 Use the spindle lock on the grinder and supplied
wrench to tighten the blade nut. Raise the spindle, slide the
“shoe” back on, and lower door.
8.4.2 Lay Dust Buggy on to its side. Lift door and slide
“shoe” off towards pointer. Using height adjustment lever,
lower spindle as far as possible.
8.4 BLADE INSTALLATION AND REMOVAL

RELATED PRODUCTS
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General Joint Cleanout / Concrete Cutting
Polyurea / Joint Filler Removal
DCB08095UD 8 X .095 X 5/8-7/8 Supreme Grade Dry Cut Blade
APB08095D 8 X .095 X 5/8-7/8 TIGERTOOTH Diamond Grit Blade
DCB08125UD 8 X .125 X 5/8-7/8 Supreme Grade Dry Cut Blade
APB08125D 8 X .125 X 5/8-7/8 TIGERTOOTH Diamond Grit Blade
DCB08250UD 8 X .250 X 5/8-7/8 Supreme Grade Dry Cut Blade

WARRANTY AND SERVICE
8.1.1 Warranty
This document is to be used as a guide in determining warranty policies and procedures for U.S.SAWS and its U.S.SAWS products. It is to be used
in determining whether a warranty is justied and as a procedural guide in completing a U.S.SAWS warranty claim form.
8.1.2 Warranty Responsibility
The distributor or the end user must prepare a Machine Warranty Information Card when the machine is delivered. Failure to comply will make
any and all warranties on this equipment null and void. Credit for warranty repairs will be given only after receipt of the WARRANTY CLAIM FORM,
properly completed with all the required details. Submittal details are described later in this document.
8.1.3 Warranty Policy
8.1.3.1 U.S.SAWS warrants its U.S.SAWS products against defects in material and workmanship under normal and proper use for a period
of one year (365) days from the date of delivery; in the case of Rental Fleet Machines, date of assignment to Rental Fleet. Such warranty is
extended only to the buyer who purchases the equipment directly from U.S.SAWS or its authorized distributor. This warranty does not include
expendable parts such as, but not limited to, plugs, cutters, blades, blast wheel, wear parts, liners and seals.
8.1.3.2 The obligation under this warranty is strictly limited to the replacement or repair, at US SAWS’s option, of machines and does not in-
clude the cost of transportation, loss of operating time, or normal maintenance services.
8.1.3.3 This warranty does not apply to failure occurring as a result of abuse, misuse, negligence, corrosion, erosion, normal wear and tear,
alterations or modications made to the machine without express written consent of U.S.SAWS .
8.1.3.4 Warranty request must be submitted in writing within thirty (30) days after failure.
8.1.3.5 Written authorization to return merchandise under warranty must rst be obtained from U.S.SAWS .
8.1.3.6 U.S.SAWS reserves the right to inspect and make the nal decision on any merchandise returned under warranty.
8.1.3.7 U.S.SAWS offers no warranty with respect to accessories, including but not limited to, engines, motors, batteries, electrical boards, tires
and any other parts not manufactured by us but which the original manufacturer warrants.
8.1.3.8 U.S.SAWS reserves the right to make product changes or improvements without prior notice and without imposing any obligation upon
itself to install the same on its products previously sold.
8.1.3.9 The above warranty conditions can only be altered by US SAWS. US SAWS must conrm alterations in writing for each specic transac-
tion.
8.1.3.10 U.S.SAWS reserves the right to establish specic warranty terms for used or demo machines on an individual transaction basis.
Invoices covering such merchandise will clearly state the provisions of the applicable warranty for each specic transaction.
8.1.3.11 WE DO NOT AUTHORIZE ANY PERSON, REPRESENTATIVE OR SERVICE OR SALES ORGANIZATION TO MAKE ANY OTHER WARRANTY OR TO
ASSUME FOR US ANY LIABILITY IN CONNECTION WITH THE SALE OF OUR PRODUCTS OTHER THAN THOSE CONTAINED HEREIN.
8.1.3.12 UNDER NO CIRCUMSTANCES SHALL US SAWS BE LIABLE TO CUSTOMER OR ANY OTHER PERSON FOR ANY DIRECT, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF ANY WARRANTY OR FOR ANY
SPECIAL OR CONSEQUENTIAL DAMAGES OF ANY CHARACTER, INCLUDING WITHOUT LIMITATIONS, DAMAGES FOR ANY LOSS OF GOODWILL,
WORK STOPPAGE, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES.
8.1.3.13 U.S.SAWS MAKES NO OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THE US SAWS PRODUCTS SOLD PURSUANT THERETO.
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8.0 WARRANTY AND SERVICE

MACHINE WARRANTY INFORMATION CARD
TO ENSURE THE PROPER WARRANTY COVERAGE IS EXTENDED TO THE OWNER OF THIS MACHINE,
FILL OUT THE ATTACHED CARD COMPLETELY AND ACCURATELY.
WARRANTY REGISTRATION CARD
IMPORTANT! To ensure that your U.S.SAWS machine is covered under warranty, please ll in the following information and mail or
fax it to U.S. SAWS, 8004B E. Broadway Ave. Tampa, FL 33619, Fax No. [phone]
If you are not the owner of record as shown on the manual copy of the warranty registration card, do not operate this
machine before contacting U.S.SAWS at 1-877-817-6687. Verify the following before operating the equipment:
CHANGE OF OWNER OR NEW ADDRESS REGISTRATION CARD
IMPORTANT! To ensure that your U.S.SAWS machine is covered under warranty, please ll in the following information and mail or
fax it to U.S. SAWS, 8004B E. Broadway Ave. Tampa, FL 33619, Fax No. [phone]
COMPANY
COMPANY
NAME
NAME
ADDRESS
ADDRESS
INTENDED USE
INTENDED USE
DATE OF PURCHASE
DATE OF PURCHASE
INTENDED USE
INTENDED USE
SERIAL NUMBER
SERIAL NUMBER
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