Model
HD83B
Owner’s Manual &
Safety Instructions
20a
Battery and Charger Sold Separately
12V 1/4" Compact Impact Wrench
WARNING: To prevent serious injury, User must read and
understand Owner’s Manual. SAVE THIS MANUAL.
When unpacking, make sure that the product is intact and undamaged.
If any parts are missing or broken, please call 1-888-866-5797
as soon as possible. Reference 57242.
IMPORTANT SAFETY INFORMATION
General Power Tool Safety Warnings
Read all safety warnings, instructions, illustrations
and specifications provided with this power tool.
Failure to follow all instructions listed below may
result in electric shock, fire and/or serious injury.
Save all warnings and instructions
for future reference.
The term “power tool” in the warnings refers
to your mains-operated (corded) power tool
or battery-operated (cordless) power tool.
Work Area Safety
a. Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
b. Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust. Power tools
create sparks which may ignite the dust or fumes.
c. Keep children and bystanders away
while operating a power tool. Distractions
can cause you to lose control.
Electrical Safety
a. Power tool plugs must match the outlet.
Never modify the plug in any way. Do not use
any adapter plugs with earthed (grounded)
power tools. Unmodified plugs and matching
outlets will reduce risk of electric shock.
b. Avoid body contact with earthed or grounded
surfaces, such as pipes, radiators, ranges
and refrigerators. There is an increased risk of
electric shock if your body is earthed or grounded.
c. Do not expose power tools to rain or wet
conditions. Water entering a power tool
will increase the risk of electric shock.
d. Do not abuse the cord. Never use the cord
for carrying, pulling or unplugging the power
tool. Keep cord away from heat, oil, sharp
edges or moving parts. Damaged or entangled
cords increase the risk of electric shock.
e. When operating a power tool outdoors,
use an extension cord suitable for outdoor
use. Use of a cord suitable for outdoor
use reduces the risk of electric shock.
f. If operating a power tool in a damp location
is unavoidable, use a ground fault circuit
interrupter (GFCI) protected supply. Use of
a GFCI reduces the risk of electric shock.
g. Hold the power tool by insulated gripping
surfaces, when performing an operation where
the fastener may contact hidden wiring or its
own cord. Fasteners contacting a “live” wire may
make exposed metal parts of the power tool “live”
and could give the operator an electric shock.
Personal Safety
a. Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use a power tool while
you are tired or under the influence of
drugs, alcohol or medication. A moment
of inattention while operating power tools
may result in serious personal injury.
b. Use personal protective equipment. Always
wear eye protection. Protective equipment
such as dust mask, non-skid safety shoes, hard
hat, or hearing protection used for appropriate
conditions will reduce personal injuries.
c. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking
up or carrying the tool. Carrying power tools
with your finger on the switch or energizing power
tools that have the switch on invites accidents.
d. Remove any adjusting key or wrench
before turning the power tool on. A wrench
or a key left attached to a rotating part of the
power tool may result in personal injury.
e. Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the power tool in unexpected situations.
f. Dress properly. Do not wear loose clothing or
jewelry. Keep your hair, clothing and gloves
away from moving parts. Loose clothes, jewelry
or long hair can be caught in moving parts.
g. If devices are provided for the connection
of dust extraction and collection
facilities, ensure these are connected
and properly used. Use of dust collection
can reduce dust-related hazards.
h. Do not let familiarity gained from frequent
use of tools allow you to become
complacent and ignore tool safety
principles. A careless action can cause
severe injury within a fraction of a second.
Page 2 For technical questions, please call 1-888-866-5797. Item 57242
i. Only use safety equipment that has been
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
specific hazards in the work area.
j. Do not lay the tool down until it has come to
a complete stop. Moving parts can grab the
surface and pull the tool out of your control.
k. When using a handheld power tool,
maintain a firm grip on the tool with both
hands to resist starting torque.
l. Do not leave the tool unattended when the
Battery Pack is connected. Turn off the tool,
and remove the Battery Pack before leaving.
m. This product is not a toy.
Keep it out of reach of children.
n. People with pacemakers should consult their
physician(s) before use. Electromagnetic fields in
close proximity to heart pacemaker could cause
pacemaker interference or pacemaker failure.
o. The warnings, precautions, and 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.
Power Tool Use and Care
a. Do not force the power tool. Use the correct
power tool for your application. The correct
power tool will do the job better and safer
at the rate for which it was designed.
b. Do not use the power tool if the switch
does not turn it on and off. Any power
tool that cannot be controlled with the switch
is dangerous and must be repaired.
c. Disconnect the plug from the power
source and/or remove the battery pack,
if detachable, from the power tool before
making any adjustments, changing
accessories, or storing power tools.
Such preventive safety measures reduce the
risk of starting the power tool accidentally.
d. Store idle power tools out of the reach of
children and do not allow persons unfamiliar
with the power tool or these instructions
to operate the power tool. Power tools are
dangerous in the hands of untrained users.
e. Maintain power tools and accessories.
Check for misalignment or binding of moving
parts, breakage of parts and any other
condition that may affect the power tool’s
operation. If damaged, have the power tool
repaired before use. Many accidents are
caused by poorly maintained power tools.
f. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
g. Use the power tool, accessories and tool bits
etc. in accordance with these instructions,
taking into account the working conditions
and the work to be performed. Use of the
power tool for operations different from those
intended could result in a hazardous situation.
h. Keep handles and grasping surfaces
dry, clean and free from oil and grease.
Slippery handles and grasping surfaces
do not allow for safe handling and control
of the tool in unexpected situations.
Service
a. Have your power tool serviced by a
qualified repair person using only identical
replacement parts. This will ensure that
the safety of the power tool is maintained.
b. Maintain labels and nameplates on the tool.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
Battery Tool Use and Care
a. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to battery pack, picking up or carrying the
power tool. Carrying the power tool with your
finger on the switch or energizing power tool
that have the switch on invites accidents.
b. Disconnect the battery pack from the
power tool before making any adjustments,
changing accessories, or storing power tool.
Such preventive safety measures reduce the
risk of starting the power tool accidentally.
c. Recharge only with the charger specified by
the manufacturer. A charger that is suitable
for one type of battery pack may create a risk
of fire when used with another battery pack.
d. Use power tools only with specifically
designated battery packs. Use of any other
battery packs may create a risk of injury and fire.
e. When battery pack is not in use, keep it away
from other metal objects, like paper clips,
coins, keys, nails, screws or other small metal
objects, that can make a connection from
one terminal to another. Shorting the battery
terminals together may cause burns or a fire.
Page 3For technical questions, please call 1-888-866-5797.Item 57242
f. Under abusive conditions, liquid may be
ejected from the battery; avoid contact.
If contact accidentally occurs, flush with
water. If liquid contacts eyes, additionally
seek medical help. Liquid ejected from the
battery may cause irritation or burns.
g. Do not use a battery pack or power tool that
is damaged or modified. Damaged or modified
batteries may exhibit unpredictable behavior
resulting in fire, explosion or risk of injury.
h. Do not expose a battery pack or power
tool to fire or excessive temperature.
Exposure to fire or temperature above
265°F may cause explosion.
i. Follow all charging instructions and do
not charge the battery pack or power tool
outside of the temperature range specified
in the instructions. Charging improperly or at
temperatures outside of the specified range may
damage the battery and increase the risk of fire.
j. Have servicing performed by a qualified
repair person using only identical
replacement parts. This will ensure that
the safety of the product is maintained.
k. Do not modify or attempt to repair the power
tool or the battery pack except as indicated
in the instructions for use and care.
l. The battery Charger gets hot during
use. The Charger’s heat can build up
to unsafe levels and create a fire
hazard if it does not receive adequate
ventilation, due to an electrical fault, or if it is used
in a hot environment. Do not place the Charger
on a flammable surface. Do not obstruct any
vents on the Charger. Especially avoid placing
the Charger on carpets and rugs; they are not
only flammable, but they also obstruct vents
under the Charger. Place the Charger on a
stable, solid, nonflammable surface (such as a
stable metal workbench or concrete floor) at least
1 foot away from all flammable objects, such as
drapes or walls. Keep a fire extinguisher and a
smoke detector in the area. Frequently monitor
the Charger and Battery Pack while charging.
Lithium Battery Safety Warnings
LITHIUM BATTERIES STORE
A LARGE AMOUNT OF ENERGY AND
WILL VENT FIRE OR EXPLODE
IF MISTREATED:
a. Keep Battery Pack dry.
b. DO NOT DO ANY OF THE FOLLOWING
TO THE BATTERY PACK:
• Open,
• Drop,
• Short-circuit,
• Puncture,
• Incinerate, or
• Expose to temperatures greater than 265°F.
c. Charge Battery Pack only according
to its Charger’s instructions.
d. Inspect Battery Pack before every use;
do not use or charge if damaged.
Page 4 For technical questions, please call 1-888-866-5797. Item 57242
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:
a. Anyone using vibrating tools regularly or for an
extended period should first be examined by a
doctor and then have regular medical checkups 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 symptoms
related to vibration (such as tingling,
numbness, and white or blue fingers), seek
medical advice as soon as possible.
b. Do not smoke during use. Nicotine reduces
the blood supply to the hands and fingers,
increasing the risk of vibration-related injury.
c. Wear suitable gloves to reduce the
vibration effects on the user.
d. Use tools with the lowest vibration
when there is a choice.
e. Include vibration-free periods each day of work.
f. Grip tool as lightly as possible (while still keeping
safe control of it). Let the tool do the work.
g. To reduce vibration, maintain the tool as
explained in this manual. If any abnormal
vibration occurs, stop use immediately.
GROUNDING
TO PREVENT ELECTRIC SHOCK AND
DEATH FROM
INCORRECT GROUNDING:
Check with a qualified electrician if you
are in doubt as to whether the outlet is properly
grounded. Do not modify the power cord plug
provided with the charger. Do not use the charger if
the power cord or plug is damaged. If damaged,
have it repaired by a service facility before use. If
the plug will not fit the outlet, have a proper outlet
installed by a qualified electrician.
Extension Cords
Note: Extension cords must not be
used with this item’s Charger.
Page 5For technical questions, please call 1-888-866-5797.Item 57242
Warning Symbols and Definitions
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.
Indicates a hazardous
situation which, if not
avoided, will result in death or serious injury.
Indicates a hazardous
situation which, if not
avoided, could result in death or serious injury.
Indicates a hazardous
situation which, if not
avoided, could result in minor or moderate injury.
Addresses practices not
related to personal injury.
V
~
A
n0 xxxx/min.
Symbology
Double Insulated
Volts
Alternating Current
Amperes
No Load Revolutions
per Minute (RPM)
WARNING marking concerning Risk
of Eye Injury. Wear ANSI-approved
safety goggles with side shields.
Read the manual before
set-up and/or use.
WARNING marking
concerning Risk of Fire.
Do not cover Charger
ventilation ducts.
Charge on fireproof surface only.
WARNING marking concerning
Risk of Electric Shock.
Properly connect Charger’s power
cord to appropriate outlet.
WARNING marking concerning
Risk of Explosion.
Do not puncture, short, or open
battery packs and do not charge
damaged battery packs.
Page 6 For technical questions, please call 1-888-866-5797. Item 57242
Specifications
Functions
Battery Type
No Load Speed 0-2,500/min
Anvil Size 1/4″
Hercules 12V Li-ion
(sold separately)
Setup - Before Use:
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.
Charging
Charge battery pack after unpacking and before using
this tool. Follow instructions included with battery
charger (battery pack and charger sold separately).
1
2
4
6
1. Anvil
2. Work Light
3. Direction Switch
4. Trigger
5. Battery Pack (sold separately)
6. Handle
3
5
Page 7For technical questions, please call 1-888-866-5797.Item 57242
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 Changing
Bit Installation
CAUTION! Only use impact rated accessories
with this tool. Other accessories may
shatter, chip, or crack during operation.
Connect an appropriate, impact rated square
drive socket (sold separately) onto the Anvil.
Attaching Belt Clip
Attach Belt Clip to Handle using supplied
Screw. Clip may be attached to either side.
Screw
Belt Clip
Setting and Testing
TO PREVENT SERIOUS INJURY FROM
ACCIDENTAL OPERATION:
Make sure that the Trigger is in the off-position
and remove its Battery Pack before
performing any procedure in this section.
1. Ensure bit is correctly installed in Impact Wrench.
2. Make sure that the Trigger is in the off-position,
then insert a fully charged Battery Pack
into the base of the Impact Wrench, making
sure that it clicks into place securely.
3. Press the Trigger and test run tool
for at least 30 seconds.
4. If abnormal noise or vibration occurs, have
the problem corrected before further use.
5. Release Trigger and disconnect Battery Pack.
Workpiece and Work Area Set Up
1. Designate a work area that is clean and well lit.
The work area must not allow access by children
or pets to prevent distraction and injury.
2. Secure loose workpieces using a vise or clamps
(not included) to prevent movement while working.
3. There must not be objects, such as utility lines,
nearby that will present a hazard while working.
Page 8 For technical questions, please call 1-888-866-5797. Item 57242
General Instructions for Use
1. Make sure that the Trigger is in the off-position,
then insert a fully charged Battery Pack
into the base of the Impact Wrench, making
sure that it clicks into place securely.
WARNING! The tool will restart automatically if stalled.
2. Set Direction Switch.
Forward: Push Switch in on right side
(arrow pointing forward) for clockwise rotation.
Reverse: Push Switch in on left
side (arrow pointing backward) for
counter-clockwise rotation.
Trigger Lock: Push Switch to the
center to lock the Trigger.
CAUTION! Set Direction Switch to center
Trigger Lock position during set up, when
changing sockets or when tool is idle.
NOTICE: Do not change direction of rotation
while Anvil is rotating. Wait until Anvil has come
to a complete stop before changing direction.
3. Use two hands to hold the tool.
4. Push socket over fastener and
squeeze Trigger slowly.
5. When finished, release and lock Trigger.
6. To prevent accidents, turn off the tool and
remove its Battery Pack after use. Clean, then
store the tool indoors out of children’s reach.
Note: The amount of actual torque will vary depending
on the cleanness and condition of the threads and
other factors. If tightening critical components,
chase threads before assembling components and
check the actual torque applied to the fastener with
a mechanical torque wrench (not supplied).
Push
for
Forward
Push to Center to
LOCK TRIGGER
Push
for
Reverse
Page 9For technical questions, please call 1-888-866-5797.Item 57242
MAINTENANCE AND
SERVICING INSTRUCTIONS
Procedures not specifically explained
in this manual must be performed
only by a qualified technician.
TO PREVENT SERIOUS INJURY FROM
ACCIDENTAL OPERATION:
Make sure that the Trigger is in the off-position
and remove its Battery Pack before
performing any procedure in this section.
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.
1. BEFORE EACH USE, inspect the general
2. AFTER USE, wipe external surfaces
3. Li-Ion BATTERY MUST BE RECYCLED OR
4. Disconnect battery pack and store battery pack,
Cleaning, Maintenance,
and Lubrication
condition of the tool. Check for:
• leaking, swollen, or cracked battery pack,
• loose hardware,
• misalignment or binding of moving parts,
• cracked or broken parts, and
• any other condition that may
affect its safe operation.
of the tool with clean cloth.
DISPOSED OF PROPERLY.
Do not short, incinerate or open battery.
charger, and tool in dry, indoor area out of
reach of children and away from metal objects
(i.e., paperclips, coins) to prevent shorting.
Troubleshooting
Problem Possible Causes Likely Solutions
Tool will not start. 1. Battery Pack not properly
Tool operates slowly. 1. Forcing tool to work too fast.
Performance
decreases over time.
Excessive noise
or rattling.
Overheating. 1. Forcing tool to work too fast.
connected.
2. Battery Pack not properly
charged.
3. Battery Pack burnt-out.
4. Internal damage or wear.
(Carbon brushes or
Trigger, for example.)
2. Battery Pack wearing out.
Carbon brushes worn or damaged. Have qualified technician replace brushes.
Internal damage or wear. (Carbon
brushes or bearings, for example.)
2. Blocked motor housing vents.
1. Remove Battery Pack, make sure there are no
obstructions, reinsert the Battery Pack according
to its shape (it should only fit one way), and press
firmly until the Battery Pack locks in place.
2. Make sure Charger is connected and
operating properly. Give enough time for
Battery Pack to recharge properly.
3. Dispose of old Battery Pack properly or recycle.
Replace Battery Pack.
4. Have technician service tool.
1. Allow tool to work at its own rate.
2. Dispose of old Battery Pack properly or recycle.
Replace Battery Pack.
Have technician service tool.
1. Allow tool to work at its own rate.
2. Wear ANSI-approved safety goggles and
NIOSH-approved dust mask/respirator while
blowing dust out of motor using compressed air.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect Battery Pack and Charger power supply before service.
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 10 For technical questions, please call 1-888-866-5797. Item 57242
Parts List and Diagram
Part Description Qty
1 Left Housing 1
2 Anti-Vibration Pad 25×8×4.7 2
3 Anti-Vibration Pad 28×9.6×7 2
4 Front Cover 1
5 Gear Box 1
6 O-Ring Ø14xØ2 1
7 Bearing Bushing Ø20×Ø14×12 1
8 Washer Ø14×Ø30×0.5 1
9-1 T-Shaft 1
9-2 Impact Block 1
9-3 Gear Ø14.5×4.5 2
9-4 Cylindrical Pin Ø3.5×7.7 2
9-5 Gear Ring Ø41.8×8.2 1
9-6 Washer Ø12.5×Ø17.5×0.5 1
Part Description Qty
9-7 Gear Ø8×17.8 1
10 Bearing 1
11 Gear Box Cover 1
12 O-Ring Ø12.6 1
13 Cross Recess Pan Head Screw M3X6 2
14 Fixed Plate 1
15 Motor 1
16 Electronic Assembly 1
17 Directional Switch 1
18 Right Housing 1
19 Hex Lock Nut M3 2
20 Star Head Tapping Screw ST2.9×14 9
21 Slotted Head Screw M3×8 1
22 Belt-Clip 1
Page 11For technical questions, please call 1-888-866-5797.Item 57242
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 verifies 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 specific legal rights and you may also have other rights which vary from state to state.
26541 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797
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