Chicago Electric 91938 Installation manual

14” HEAVY DUTY CUT-OFF SAW
Model 91938
SET UP AND OPERATING INSTRUCTIONS
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright©2004 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork
contained herein may be reproduced in any shape or form without the express written consent of
Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Manual Revised 10a

Page 2 For technical questions, please call 1-800-444-3353. SKU 91938
CONTENTS
IMPORTANT SAFETY
INFORMATION.................................3
GENERAL TOOL SAFETY WARNINGS. 3
GROUNDING INSTRUCTIONS..........5
110-120 V~ GROUNDED TOOLS:
TOOLS WITH
THREE PRONG PLUGS....................... 5
CUT-OFF SAW SAFETY WARNINGS .... 5
SPECIFICATIONS...............................8
UNPACKING.......................................8
INSTRUCTIONS FOR PUTTING
INTO USE .........................................8
FUNCTIONS............................................ 8
OPERATING INSTRUCTIONS ...........9
TOOL SET UP ......................................... 9
WORK PIECE AND WORK AREA
SET UP ............................................... 10
GENERAL OPERATING
INSTRUCTIONS ..................................11
MAINTENANCE AND SERVICING...12
CLEANING, MAINTENANCE, AND
LUBRICATION.................................... 12
TROUBLESHOOTING........................... 13
PARTS LIST......................................14
ASSEMBLY DIAGRAM.....................15
LIMITED 90 DAY WARRANTY.........16

Page 3For technical questions, please call 1-800-444-3353.SKU 91938
SAVE THIS MANUAL
Keep this manual for the safety warnings
and precautions, assembly, operating,
inspection, maintenance and cleaning
procedures. Write the product’s serial number
in the back of the manual near the assembly
diagram (or month and year of purchase if
product has no number). Keep this manual
and the receipt in a safe and dry place for
future reference.
IMPORTANT SAFETY
INFORMATION
In this manual, on the labeling, and
all other information provided with
this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that follow
this symbol to avoid possible
injury or death.
DANGER indicates a
hazardous situation
which, if not avoided, will result
in death or serious injury.
WARNING indicates a
hazardous situation
which, if not avoided, could
result in death or serious injury.
CAUTION, used with
the safety alert
symbol, indicates a hazardous
situation which, if not avoided,
could result in minor or moderate
injury.
NOTICE is used to
address practices not
related to personal injury.
CAUTION, without the
safety alert symbol, is
used to address practices not
related to personal injury.
General Tool Safety Warnings
WARNING Read all safety warnings
and instructions. Failure to follow the
warnings and instructions may result
in electric shock, re and/or serious
injury.
Save all warnings and instructions
for future reference.
KEEP GUARDS IN PLACE and in1. working order.
REMOVE ADJUSTING KEYS AND2. WRENCHES. Form habit of checking to
see that keys and adjusting wrenches
are removed from tool before turning it
on.
KEEP WORK AREA CLEAN. Cluttered3. areas and benches invite accidents.
DON’T USE IN DANGEROUS4. ENVIRONMENT. Don’t use power tools
in damp or wet locations, or expose them
to rain. Keep work area well lighted.
KEEP CHILDREN AWAY. All visitors5. should be kept safe distance from work
area.
MAKE WORKSHOP KID PROOF6. with padlocks, master switches, or by
removing starter keys.
DON’T FORCE TOOL. It will do the job7. better and safer at the rate for which it
was designed.

Page 4 For technical questions, please call 1-800-444-3353. SKU 91938
USE RIGHT TOOL. Don’t force tool or8. attachment to do a job for which it was
not designed.
RECOMMENDED MINIMUM WIRE
GAUGE FOR EXTENSION CORDS
(120 VOLT)
NAMEPLATE
AMPERES
(at full load)
EXTENSION CORD
LENGTH
25’ 50’ 100’ 150’
0 – 6 18 16 16 14
6.1 – 10 18 16 14 12
10.1 – 12 16 16 14 12
12.1 – 16 14 12 Do not use.
TABLE A
USE PROPER EXTENSION CORD.9. Make sure your extension cord is in good
condition. When using an extension
cord, be sure to use one heavy enough
to carry the current your product will
draw. An undersized cord will cause a
drop in line voltage resulting in loss of
power and overheating. Table A shows
the correct size to use depending on
cord length and nameplate ampere
rating. If in doubt, use the next heavier
gauge. The smaller the gauge number,
the heavier the cord.
WEAR PROPER APPAREL. Do not wear10. loose clothing, gloves, neckties, rings,
bracelets, or other jewelry which may get
caught in moving parts. Nonslip footwear
is recommended. Wear protective hair
covering to contain long hair.
ALWAYS USE SAFETY GLASSES. Also11. use face or dust mask if cutting operation
is dusty. Everyday eyeglasses only have
impact resistant lenses, they are NOT
safety glasses.
SECURE WORK. Use vise to hold work12. when practical. It’s safer than using your
hand and it frees both hands to operate
tool.
DON’T OVERREACH. Keep proper13. footing and balance at all times.
MAINTAIN TOOLS WITH CARE. Keep14. tools sharp and clean for best and safest
performance. Follow instructions for
lubricating and changing accessories.
DISCONNECT TOOLS before servicing;15. when changing accessories, such as
blades, bits, cutters, and the like.
REDUCE THE RISK OF16. UNINTENTIONAL STARTING. Make
sure switch is in off position before
plugging in.
USE RECOMMENDED ACCESSORIES.17. Consult the owner’s manual for
recommended accessories. The use of
improper accessories may cause risk of
injury to persons.
NEVER STAND ON TOOL. Serious18. injury could occur if the tool is tipped
or if the cutting tool is unintentionally
contacted.
CHECK DAMAGED PARTS. Before19. further use of the tool, a guard or other
part that is damaged should be carefully
checked to determine that it will operate
properly and perform its intended
function – check for alignment of moving
parts, binding of moving parts, breakage
of parts, mounting, and any other
conditions that may affect its operation.
A guard or other part that is damaged
should be properly repaired or replaced.
DIRECTION OF FEED. Feed work into20. a blade or cutter against the direction of
rotation of the blade or cutter only.
NEVER LEAVE TOOL RUNNING21. UNATTENDED. TURN POWER OFF.
Don’t leave tool until it comes to a
complete stop.

Page 5For technical questions, please call 1-800-444-3353.SKU 91938
GROUNDING INSTRUCTIONS
TO PREVENT
ELECTRIC SHOCK
AND DEATH FROM INCORRECT
GROUNDING WIRE
CONNECTION
READ AND FOLLOW THESE
INSTRUCTIONS:
110-120 V~ Grounded Tools:
Tools with Three Prong Plugs
In the event of a malfunction or1. breakdown, grounding provides a path
of least resistance for electric current
to reduce the risk of electric shock.
This tool is equipped with an electric
cord having an equipment-grounding
conductor and a grounding plug. The
plug must be plugged into a matching
outlet that is properly installed and
grounded in accordance with all local
codes and ordinances.
Do not modify the plug provided – if it will2.
not t the outlet, have the proper outlet
installed by a qualied electrician.
Improper connection of the equipment-3. grounding conductor can result in a risk
of electric shock. The conductor with
insulation having an outer surface that
is green with or without yellow stripes is
the equipment-grounding conductor. If
repair or replacement of the electric cord
or plug is necessary, do not connect the
equipment-grounding conductor to a live
terminal.
Check with a qualied electrician or 4. service personnel if the grounding
instructions are not completely
understood, or if in doubt as to whether
the tool is properly grounded.
Use only 3-wire extension cords that5. have 3-prong grounding plugs and
3-pole receptacles that accept the tool’s
plug.
Repair or replace damaged or worn cord6. immediately.
125 V~ 3-Prong Plug and Outlet
(for up to 125 V~ and up to 15 A)
Grounding
Pin
This tool is intended for use on a circuit7. that has an outlet that looks like the one
illustrated above in 125 V~ 3-Prong
Plug and Outlet. The tool has a
grounding plug that looks like the plug
illustrated above in 125 V~ 3-Prong
Plug and Outlet.
The outlet must be properly installed and8. grounded in accordance with all codes
and ordinances.
Do not use an adapter to connect this9. tool to a different outlet.
Cut-off Saw Safety Warnings
For Your Own Safety Read Instruction
Manual Before Operating Cut-off Saw
Check Swing Guard (53) for proper1. closing before each use. Do not operate
the Saw if the Swing Guard does not
move freely and close instantly. Never
clamp or tie the Swing Guard (53)
into the open position. If the saw is
accidently dropped, the Swing Guard
(53) may be bent. Raise the Swing
Guard (53) and make sure it moves
freely and does not touch the Cut-Off
Wheel or another part, in all depths of
cut.

Page 6 For technical questions, please call 1-800-444-3353. SKU 91938
The Swing Guard (53) should be2. retracted manually only for special cuts
such as “Pocket Cuts) and “Compound
Cuts.” Raise the Swing Guard (53) only
enough to begin the cut. As soon as
the Cut-Off Wheel enters the material,
the Swing Guard (53) must be released.
For all other sawing, the Swing Guard
(53) should be allowed to operate
automatically.
The Saw is not to be used for any cutting3. in the locked down position. The Saw
should be locked down position only for
carrying and storage.
Always use Cut-Off Wheels with a 14”4. diameter, 1” arbor hole, and rated at a
minimum of 3750 RPM. Cut-Off Wheels
that do not match the mounting hardware
of the Saw or that are rated at less than
the Saw’s maximum RPM may y off the
Saw or may run eccentrically, causing
loss of control.
Never use damaged or incorrect Cut-5. Off Wheel washers or bolts. The Cut-
Off Wheel’s washers and bolts were
specially designed for your Saw, for
optimum performance and safety of
operation.
Do not use the included Cut-Off Wheel6. to cut aluminum, copper, brass, or other
non-ferrous metals. The included Cut-
Off Wheel is designed to cut only ferrous
(iron containing) metals such as steel
alloys and cast iron. If using other Cut-
Off Wheels, only use them on materials
that the manufacturer recommends.
Before using the Cut-Off Saw, make sure7. the Cut-Off Wheel is properly mounted
on the saw spindle. Make sure the Cut-
Off Wheel is balanced and is not broken
or bent.
Wear eye protection.8.
Use grinding wheel suitable for speed of9. cut-off saw.
Replace cracked wheel immediately.10.
Do not overtighten wheel nut.11.
Use only anges furnished with the cut-12. off saw.
Frequently clean grinding dust from13. beneath cut-off saw.
Wear a full face shield over ANSI-14. approved safety goggles during use.
DO NOT OPERATE WITH ANY15. GUARD DISABLED, DAMAGED, OR
REMOVED. Moving guards must
move freely and close instantly.
The use of accessories or attachments16. not recommended by the manufacturer
may result in a risk of injury to persons.
When servicing use only identical17. replacement parts.
Only use safety equipment that has been18. approved by an appropriate standards
agency. Unapproved safety equipment
may not provide adequate protection.
Eye protection must be ANSI-approved
and breathing protection must be
NIOSH-approved for the specic hazards
in the work area.
Industrial applications must follow OSHA19. guidelines.
Maintain labels and nameplates on20. the tool. These carry important safety
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
Avoid unintentional starting. Prepare to21. begin work before turning on the tool.
People with pacemakers should22. consult their physician(s) before use.
Electromagnetic elds in close proximity
to heart pacemaker could cause

Page 7For technical questions, please call 1-800-444-3353.SKU 91938
pacemaker interference or pacemaker
failure.
WARNING: Some dust created by power23. sanding, sawing, grinding, drilling, and
other construction activities, contains
chemicals known [to the State of
California] to cause cancer, birth defects
or other reproductive harm. Some
examples of these chemicals are:
• Lead from lead-based paints
• Crystalline silica from bricks and
cement or other masonry products
• Arsenic and chromium from chemically
treated lumber
Your risk from these exposures varies,
depending on how often you do this type
of work. To reduce your exposure to
these chemicals: work in a well ventilated
area, and work with approved safety
equipment, such as those dust masks
that are specially designed to lter out
microscopic particles. (California Health
& Safety Code § 25249.5, et seq.)
WARNING: Handling the cord on this24. product will expose you to lead, a
chemical known to the State of California
to cause cancer, and birth defects or
other reproductive harm. Wash hands
after handling. (California Health &
Safety Code § 25249.5, et seq.)
The warnings, precautions, and25. instructions discussed in this instruction
manual cannot cover all possible
conditions and situations that may occur.
It must be understood by the operator
that common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
Vibration Safety
This tool vibrates during use. Repeated
or long-term exposure to vibration may
cause temporary or permanent physical
injury, particularly to the hands, arms
and shoulders. To reduce the risk of
vibration-related injury:
Anyone using vibrating tools regularly1.
or for an extended period should rst
be examined by a doctor and then have
regular medical check-ups to ensure
medical problems are not being caused
or worsened from use. Pregnant
women or people who have impaired
blood circulation to the hand, past hand
injuries, nervous system disorders,
diabetes, or Raynaud’s Disease should
not use this tool. If you feel any medical
or physical symptoms related to vibration
(such as tingling, numbness, and white
or blue ngers), seek medical advice as
soon as possible.
Do not smoke during use. Nicotine2. reduces the blood supply to the hands
and ngers, increasing the risk of
vibration-related injury.
Wear suitable gloves to reduce the3. vibration effects on the user.
Use tools with the lowest vibration when4. there is a choice between different
processes.
Include vibration-free periods each day5. of work.
Grip tool as lightly as possible (while still6. keeping safe control of it). Let the tool
do the work.
To reduce vibration, maintain the tool7. as explained in this manual. If any
abnormal vibration occurs, stop use
immediately.
SAVE THESE
INSTRUCTIONS.

Page 8 For technical questions, please call 1-800-444-3353. SKU 91938
SPECIFICATIONS
Electrical Input 120 V~ / 60 Hz / 2 HP
Motor No Load Speed 3500 RPM
Max. Accessory
Diameter 14”
Recommended Cut-Off
Wheel Types 14” Cut-Off Wheel for Metal (SKU 44814, included)
14” Cut-Off Wheel for
Masonry (SKU 44815)
Cutting Capacity 4-1/4”
Quick Release Vise
Capacities 7” (1st Setting), 9-1/2” (2nd Setting)
Arbor Size 1”
E105017
UNPACKING
When unpacking, make sure that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor
Freight Tools at 1-800-444-3353 as soon as
possible.
INSTRUCTIONS FOR PUTTING
INTO USE
Functions
Base (13)
Handle
(100,109)
Motor
Housing
(75)
Vise Handle (28)
Trigger (103)
Lock

Page 9For technical questions, please call 1-800-444-3353.SKU 91938
OPERATING INSTRUCTIONS
Read the ENTIRE IMPORTANT
SAFETY INFORMATION
section at the beginning of this
manual including all text under
subheadings therein before set up
or use of this product.
Tool Set Up
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
Release the Trigger, unplug the
tool from its electrical outlet and
allow the wheel to cool
completely before performing
any inspection, maintenance, or
cleaning procedures.
To Remove or Install a Cut-Off Wheel
Raise the Saw if it is locked down by1. pushing down on it and pulling out the
Lock Ball (25).
Open the Swing Guard (53) and tighten2. the Bolt (112) to secure it while working
on the Wheel.
FIGURE 1
Lock Pin
(63)
Fixed
Guard (60)
Handle
3. Push the Lock Pin (63) towards the
Fixed Guard (60) as shown in FIGURE
1. Rotate the wheel until the Lock Pin
(63) slides into place.
FIGURE 2
Lock
Pin (63)
Hex Key
(111a)
Socket Head
Bolt (54)
4. While continuing to hold down the Lock
Pin (63), use the Hex Key (111a) to
loosen the Socket Head Bolt (54). See
FIGURE 2.
Remove the Socket Head Bolt (54), the5. Flange Washer (96), the Outer Flange
(55), and the Cut-Off Wheel (56).
Socket Head
Bolt (54)
Flange
Washer (96)
Outer
Flange (55)
Cut-off Wheel (56)
Inner Flange (57)
6. Replace with a new Cut-Off Wheel (56),
and reassemble the parts listed above
in number 3. The concave side of the
Outer Flange (55) must face the wheel.
While holding the Lock Pin (63), tighten
the Socket Head Bolt (54) with the Hex
Key (111a).

Page 10 For technical questions, please call 1-800-444-3353. SKU 91938
LOOSEN THE BOLT (112)7. and make
sure that the Swing Guard (53)
moves freely back into place before
operation.
Depth Adjustment
FIGURE 3
Lock Ball (25)
Depth Adjustment
Bolt (16)
To adjust the depth, turn the Depth
Adjustment Bolt (16) shown in FIGURE
3.
Work Piece and Work Area Set Up
Designate a work area that is clean and1. well-lit. The work area must not allow
access by children or pets to prevent
distraction and injury.
Route the power cord along a safe2. route to reach the work area without
creating a tripping hazard or exposing
the power cord to possible damage. The
power cord must reach the work area
with enough extra length to allow free
movement while working.
Secure loose work pieces using the vise3. to prevent movement while working:
FIGURE 4
Vise Handle (28)
Place Workpiece Here
Quick
Release (31)
a. To use the Quick Release (31), put the
Quick Release (31) tab in the position
shown in FIGURE 4 and push the Vise
Handle (28) up against the workpiece.
Then tighten the Vise Handle (28).
When releasing, loosen the Vise Handle
(28) a few turns, lift up the Quick
Release (31), and pull the Vise Handle
(28) open.

Page 11For technical questions, please call 1-800-444-3353.SKU 91938
FIGURE 5
Bolts (41 & 44)
Angle
Scale
(35)
Upper Two Screw Holes
b. To cut at various angles (up to 45
degrees), adjust the Angle Scale (35)
by loosening the two Bolts (41 & 44) as
shown in FIGURE 5. Adjust the Angle
Scale to the desired setting and then
tighten the Bolts (41 & 44).
To reposition the Angle Scale (35),c. remove both of the Bolts (41 & 44), and
reattach the Angle Scale at the upper
two screw holes. See FIGURE 4.
There must not be objects, such as utility4. lines, nearby that will present a hazard
while working.
General Operating Instructions
TO PREVENT
SERIOUS INJURY:
DO NOT OPERATE WITH ANY
GUARD DISABLED, DAMAGED,
OR REMOVED. Moving guards
must move freely and close
instantly. Bolt (112) MUST be
loose before operation.
Using the vise, secure your workpiece1. and, if necessary, adjust the angle of the
cut.
Raise the Saw by pushing down on it2. and pulling out the Lock Ball (25).
Plug the Power Cord into the nearest3. 120 V~, grounded, electrical outlet. Slide
the Trigger Lock and pull the Trigger to
start the Saw. Allow the Cut-Off Wheel
to attain full speed.
With one hand on the Handle and the4. other hand clear, slowly bring the Saw
down onto the Base, letting the Saw do
the work. Do not apply excessive force.
If the Cut-Off Wheel does not cut all the5. way through the workpiece, raise the
Saw and release the Trigger. Unplug the
unit. Wait until the unit comes to a full
stop. Remove the workpiece. Set the
depth adjustment to a deeper setting.
After adjusting the depth, bring the Saw
all the way down to make sure the Cut-
Off Wheel doesn’t contact the Base. If it
does contact any part of the Base, re-
adjust the depth so it doesn’t.
Repeat the cutting process starting with6. number 1 above.
Once the cut is completed, turn off the7. Saw by releasing the Trigger and unplug
the unit. Do not attempt to remove the
workpiece until the Cut-Off Wheel has
stopped moving.
To prevent accidents, turn off the tool,8. disconnect its power supply, and lock it
down by pushing it down as far as it will
go, and then pushing the Lock Ball (25)
in after use. Clean, then store the tool
indoors out of children’s reach.

Page 12 For technical questions, please call 1-800-444-3353. SKU 91938
MAINTENANCE AND
SERVICING
 Proceduresnotspecically
explained in this manual must
beperformedonlybyaqualied
technician.
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
Release the Trigger, unplug the
tool from its electrical outlet and
allow the wheel to cool
completely before performing
any inspection, maintenance, or
cleaning procedures.
TO PREVENT SERIOUS INJURY
FROM TOOL FAILURE:
Do not use damaged equipment.
If abnormal noise or vibration
occurs, have the problem
corrected before further use.
Cleaning, Maintenance, and
Lubrication
BEFORE EACH USE,1. inspect the
general condition of the tool. Check for
loose hardware, misalignment or binding
of moving parts, cracked or broken parts,
damaged electrical wiring, and any
other condition that may affect its safe
operation.
AFTER USE,2. wipe external surfaces of
the tool with clean cloth.
3. WARNING! If the supply cord of
this power tool is damaged, it must be
replacedonlybyaqualiedservice
technician.

Page 13For technical questions, please call 1-800-444-3353.SKU 91938
Troubleshooting
Problem Possible Causes Likely Solutions
Tool will not start. Cord not connected.1.
No power at outlet.2.
Tool’s thermal reset breaker3. tripped (if equipped).
Internal damage or wear.4. (Carbon brushes or switch, for
example.)
Check that cord is plugged in.1.
Check power at outlet. If outlet is unpowered,2. turn off tool and check circuit breaker. If breaker
is tripped, make sure circuit is right capacity for
tool and circuit has no other loads.
Turn off tool and allow to cool. Press reset button3. on tool.
Have technician service tool.4.
Tool operates slowly. Extension cord too long or wire size
too small. Eliminate use of extension cord. If an extension cord is needed, use shorter/heavier gauge cord.
See Extension Cords in GROUNDING section.
Performance
decreases over time. Carbon brushes worn or damaged. Have qualied technician replace brushes.
Excessive noise or
rattling. Internal damage or wear. (Carbon brushes or bearings, for example.) Have technician service tool.
Overheating. Forcing machine to work too fast.1.
Accessory misaligned.2.
Blocked motor housing vents.3.
Motor being strained by long or4. small diameter extension cord.
Allow machine to work at its own rate.1.
Check and correct accessory to fence and/or2. table alignment.
Wear ANSI-approved safety goggles and NIOSH-3. approved dust mask/respirator while blowing dust
out of motor using compressed air.
Eliminate use of extension cord. If an extension4. cord is needed, use one with the proper diameter
for its length and load. See Extension Cords in
GROUNDING section.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect power supply before service.

Page 14 For technical questions, please call 1-800-444-3353. SKU 91938
Part Description
1 Bolt M6x14
2 Lock Nut
3 Dust Cover
4 Bolt M5x12
5 Lock Nut M6
6 Nut M10
7 Nut M10
8 Binding Ring
9 Washer
10 Nut M8
11 Bolt 4-M6x24
12 Rubber Foot
13 Base
14 Bracket
15 Nut M8
16 Depth Adjustment Bolt
17 Screw
18 Lock Nut M6
19 Bolt 2-M5x10
21 Lock Down Pin
22 Rubber Gasket
23 Rubber Gasket
24 Binding Ring
25 Lock Ball
26 Roll Pin
27 Thread Bar
28 Vise Handle
29 Handle Pin
30 Vise Base
31 Quick Release
32 Lock Washer
33 Screw
34 Sliding Jaw
35 Angle Scale
Part Description
36 Straight Pin
37 Washer
38 Binding Ring
39 Washer
40 Pin
41 Bolt M10x20
42 Lock Washer
43 Washer
44 Bolt M10x20
45 Lock Washer
46 Washer
53 Swing Guard
54 Socket Head Bolt
55 Outer Flange
56 Cut-Off Wheel
57 Inner Flange
58 Screw
59 Lock Washer
60 Fixed Guard
61 Arbor
62 Spring
63 Lock Pin
64 Bolt 2-M5x54
65 Lock Washer
66 Carbon Brush Holder
67 Carbon Brush
68 Carbon Brush Cover
69 Bolt 2-M5x10
70 Cover
71 Bolt 2-M5x10
72 Screw M4x10
73 Lock Washer
74 Washer
75 Motor Housing
Part Description
76 Spring
77 Binding Ring
78 Cross Pin
81 Binding Ring
82 Stator
83 Circle Block
84 Bearing
85 Armature
86 Bearing
87 Middle Cover
88 Bearing Ring
89 Binding Ring
90 Gear
91 Front cover
92 Bearing
93 Half Washer
96 Flange Washer
97 Nut M6
98 Bolt M6x10
99 Nut M4
100 Left Handle
101 Nut M5
103 Trigger with Lock
104 Screw
105 Wire Board
106 Sheathing
107 Power Cord
108 Screw
109 Right Handle
110 Bolt 3-M5x50
111a Hex Key
112 Socket Head Bolt
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY
DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR
DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE
OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED
TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR
EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY
CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK
AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT
PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
PARTS LIST
REV 10a
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts.

Page 15For technical questions, please call 1-800-444-3353.SKU 91938
ASSEMBLY DIAGRAM
Hex Key (111a) - not shown.
REV 10a, 10b
112

Page 16 For technical questions, please call 1-800-444-3353. SKU 91938
LIMITED 90 DAY WARRANTY
Harbor Freight Tools Co. makes every
effort to assure that its products meet
high quality and durability standards, and
warrants to the original purchaser that this
product is free from defects in materials and
workmanship for the period of 90 days from
the date of purchase. This warranty does not
apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents,
repairs or alterations outside our facilities,
criminal activity, improper installation, normal
wear and tear, or to lack of maintenance. We
shall in no event be liable for death, injuries
to persons or property, or for incidental,
contingent, special or consequential damages
arising from the use of our product. Some
states do not allow the exclusion or limitation
of incidental or consequential damages,
so the above limitation of exclusion may
not apply to you. THIS WARRANTY IS
EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS.
To take advantage of this warranty,
the product or part must be returned to us
with transportation charges prepaid. Proof
of purchase date and an explanation of the
complaint must accompany the merchandise.
If our inspection veries the defect, we
will either repair or replace the product at
our election or we may elect to refund the
purchase price if we cannot readily and
quickly provide you with a replacement. We
will return repaired products at our expense,
but if we determine there is no defect, or that
the defect resulted from causes not within the
scope of our warranty, then you must bear the
cost of returning the product.
This warranty gives you specic legal
rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009
Camarillo, CA 93011 • [phone]