Model
HD91K
Owner’s Manual &
Safety Instructions
18i
12V Lithium-Ion 3/8" Drill / Driver Kit
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 64370.
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
1. Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
2. 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.
3. Keep children and bystanders
away while operating a power tool.
Distractions can cause you to lose control.
Electrical Safety
1. 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.
2. 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.
3. Do not expose power tools to rain or wet
conditions. Water entering a power tool
will increase the risk of electric shock.
4. 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.
5. 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.
6. 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.
Personal Safety
1. 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.
2. 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.
3. 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.
4. 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.
5. Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the power tool in unexpected situations.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. When using a handheld power tool,
maintain a firm grip on the tool with both
hands to resist starting torque.
12. Do not leave the tool unattended when the
Battery Pack is connected. Turn off the tool,
and remove the Battery Pack before leaving.
Page 2 For technical questions, please call 1-888-866-5797. Items 64370
13. This product is not a toy.
Keep it out of reach of children.
14. 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.
15. 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
1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
7. 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.
8. 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
1. 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.
2. 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
1. 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.
2. 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
3. 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.
4. Use power tools only with specifically
designated battery packs. Use of any other
battery packs may create a risk of injury and fire.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
Page 3For technical questions, please call 1-888-866-5797.Items 64370
10. Have servicing performed by a qualified
repair person using only identical
replacement parts. This will ensure that
the safety of the product is maintained.
11. Do not modify or attempt to repair the power
tool or the battery pack except as indicated
in the instructions for use and care.
12. 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:
1. Keep Battery Pack dry.
2. DO NOT DO ANY OF THE FOLLOWING
TO THE BATTERY PACK:
• Open
• Drop
• Short-circuit
• Puncture
• Incinerate
• Expose to temperatures greater than 265° F.
3. Charge Battery Pack only according to instructions.
4. Inspect Battery Pack before every use;
do not use or charge if damaged.
Safety Instructions for All Operations
1. Wear ear protectors when Impact drilling.
Exposure to noise can cause hearing loss.
2. Brace the tool properly before use. This
tool produces a high output torque and without
properly bracing the tool during operation, loss of
control may occur resulting in personal injury.
3. Hold the power tool by insulated gripping
surfaces, when performing an operation
where the cutting accessory or fasteners
may contact hidden wiring or its own cord.
Cutting accessory contacting a “live” wire may
make exposed metal parts of the power tool “live”
and could give the operator an electric shock.
4. Let bit cool before touching, changing
or adjusting it. Bits heat up dramatically
while in use, and can burn you.
5. If the drill bit jams, release the Switch immediately;
drill torque can cause injury or break bit.
Safety Instructions When
Using Long Drill Bits
1. Never operate at higher speed than the maximum
speed rating of the drill bit. At higher speeds, the
bit is likely to bend if allowed to rotate freely without
contacting the workpiece, resulting in personal injury.
2. Always start drilling at low speed and with
the bit tip in contact with the workpiece.
At higher speeds, the bit is likely to bend if
allowed to rotate freely without contacting the
workpiece, resulting in personal injury.
3. Apply pressure only in direct line with the
bit and do not apply excessive pressure.
Bits can bend causing breakage or loss of
control, resulting in personal injury.
Page 4 For technical questions, please call 1-888-866-5797. Items 64370
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:
1. Anyone using vibrating tools regularly or for an
extended period should first 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 symptoms related to vibration (such
as tingling, numbness, and white or blue fingers),
seek medical advice as soon as possible.
2. Do not smoke during use. Nicotine reduces
the blood supply to the hands and fingers,
increasing the risk of vibration-related injury.
3. Wear suitable gloves to reduce the
vibration effects on the user.
4. Use tools with the lowest vibration
when there is a choice.
5. Include vibration-free periods each day of work.
6. Grip tool as lightly as possible (while still keeping
safe control of it). Let the tool do the work.
7. To reduce vibration, maintain the tool as
explained in this manual. If any abnormal
vibration occurs, stop use immediately.
SAVE THESE
INSTRUCTIONS
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
Extension cords must not be used
with this item’s Charger.
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.
Page 5For technical questions, please call 1-888-866-5797.Items 64370
V
A
n0 xxxx/min.
Symbology
Volts
Direct 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 Hearing Loss.
Wear hearing protection.
WARNING marking
concerning Risk of Fire.
Do not cover Charger
ventilation ducts.
Charge on fireproof surface only.
WARNING marking concerning
Risk of Explosion.
Do not puncture, short, or open
battery packs and do not charge
damaged battery packs.
WARNING marking concerning
Risk of Electric Shock.
Properly connect Charger’s power
cord to appropriate outlet.
SPECIFICATIONS
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.
Functional Description
12V 3/8" Drill / Driver
2 3
1
7
1. Jaws
2. Chuck
3. Torque Selector
4. Speed Selector
5. Direction Switch
6. Trigger
7. Work Light
Charger / Battery Pack
5
1
4
6
5
6
Charger Input Rating 120 VAC / 60 Hz / 2.0 A
Battery Rating 12 V / 2.0 Ah
Battery Type Li-ion
No Load Speed 0 – 400 / 0 –1500 RPM
Chuck Size 3/8"
2
7
8
3
1. Charge Terminals
2. Charge Indicators
3. Battery Terminals
4. Release Button
5. Bay
6. Vents
7. Charge Gauge
8. Charge Gauge Button
Page 6 For technical questions, please call 1-888-866-5797. Items 64370
4
Charger Operation
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.
When to Charge
1. Charge the Battery Pack when convenient.
2. The Battery Pack does not need to be completely
discharged before charging. It will not develop
a “memory” if charged while still partially full.
3. To help protect the Battery Pack, it must
be charged when the charge level is near
empty. If a lithium-ion battery is allowed to
discharge completely, it can be ruined.
Charging
CHARGING
Red Constant
Green Flashing
CHARGED
Red Off
Green Constant
HOT/COLD DELAY
Red Flashing
Green Flashing
PROBLEM PACK OR CHARGER
Red Flashing
Green Off
Charge Indicators
1. Place the Battery Pack on a dry fireproof surface in a
room where the temperature is between 50–104° F.
Note: If recharging a newly spent Battery Pack,
allow it to cool completely before charging.
2. Examine the Battery Pack. It must be
an undamaged, 12 volt, Lithium-ion type
Battery Pack. Do not charge a cracked,
open, or leaking Battery Pack, or charge a
non-recommended type of Battery Pack.
3. The Battery Pack’s terminals are designed to fit
this Charger specifically. If the Battery Pack does
to not fit the Charger properly, do not try to insert it.
Do not force a Battery Pack into the Charger.
4. Plug the Charger into a grounded,
120 VAC, 60 Hz receptacle.
5. Slide the Battery Pack onto the Charger.
• A fully discharged 2.0 Ah Battery Pack
will take about 60 minutes to fully charge.
Note: If the Battery Pack is hot or cold, the Charge
Indicators may both flash, indicating that the Charger
is waiting for the temperature to normalize before
Charging. Charging will start automatically once the
Battery Pack reaches the correct temperature.
6. While charging, the Battery Pack and Charger
may become warm to the touch. This is
normal, and does not indicate a problem.
7. The red LED will light constantly and the green
LED will flash when the Battery Pack is charging.
The green LED will light constantly and the red
LED will turn off when the battery is charged.
Unplug the Charger and disconnect it
from the Battery Pack when finished.
8. Allow the Battery Pack to cool
completely before using it.
9. Press the Release Button to release
Battery Pack from the Charger.
Battery Pack Operation
Charge Gauge
Press the Charge Gauge Button on the
Battery to check its remaining run time.
Remaining run time (approximate)
0-30%
31-50%
51-100%
Note: If the Charge Gauge does not
display when the Charge Gauge Button is
pressed, charge the Battery Pack.
The Battery Pack will shut itself off
once it is fully discharged. Charge the
Battery Pack when this happens.
Cold Weather
To warm up a Battery Pack that is very cold,
operate the tool slowly or in a light application for
a few minutes until the Battery Pack warms-up.
Page 7For technical questions, please call 1-888-866-5797.Items 64370
Battery Storage
To prevent serious injury, do not do any
of the following to the Battery Pack:
• Open
• Drop
• Short-circuit
• Puncture
• Incinerate
• Expose to temperatures greater than 265° F.
1. Store batteries in a dry, indoor area
at room temperature out of reach of
children and away from metal objects
(i.e., paperclips, coins) to prevent shorting.
NOTICE: Battery may be damaged if stored
at high temperatures (over 120° F).
2. Recharge the Battery Pack at least once a year.
OPERATION
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:
Make sure that the Trigger is locked and Battery
Pack is removed before performing any procedure
in this section.
Bit Installation
CAUTION! Wear heavy-duty work gloves
to provide protection when inserting and
removing bits. Bits become very hot during
use. Do not remove bit until it has cooled.
NOTICE: Use sharp bits. Dull, bent, or damaged
bits will cause stress on the drill and/or break.
1. Rotate Chuck counterclockwise until Jaws
are opened enough for bit to fit.
2. Use a bit designed for workpiece type. Place
desired drill, screwdriver, bolt or nut bit into Jaws.
Note: In addition to single or double-ended
bits, adapters with hexagonal shafts with
matching socket heads can also be used.
3. Rotate Chuck clockwise until bit is held
securely in place, centered between Jaws.
Attaching Belt Clip
Attach Belt Clip to Handle using supplied
Screw. Clip may be attached to either side.
Screw
Belt Clip
Setting Torque
1. Set torque by rotating Torque Selector.
2. Use the numbered torque settings from
1 to 17 for driving screws, bolts and nuts.
• The torque setting required depends on the
object being driven. In the case of screws,
consider the size, length, and type of material.
• If a pilot hole has been drilled into the material,
a lower torque setting will be required.
• Adjust the torque setting low enough to allow
a safety margin. Use a very low torque
setting when first driving small screws into
soft materials. Then adjust the setting as
the proper force required is determined.
3. Use the setting marked by the
drill icon for drilling.
Speed Selection
Adjust Speed Selector to proper setting:
• Low Speed: Select 1
• High Speed: Select 2
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. Items 64370
General Operation
1. Lock Trigger, then insert a fully charged Battery
Pack, making sure that it clicks into place securely.
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 Control Switch to center
Trigger Lock position during set up, when
changing bits or when tool is idle.
Push
for
Forward
Push to Center to
LOCK TRIGGER
3. Install bit and select torque, speed
and direction of rotation.
NOTICE: Do not change direction of rotation
while Chuck is rotating. Wait until Chuck has come
to a complete stop before changing direction.
4. Press Trigger to start the tool. The Work
Light will turn on when Trigger is pressed
and turn off when Trigger is released.
5. The tool has variable speed. To increase
speed, apply more pressure to Trigger. To
decrease speed, lessen pressure on Trigger.
Push
for
Reverse
6. When inserting or removing a screw or bolt, use
slight pressure at first to keep the bit in the head
of the screw or bolt and cause the screw or bolt
to thread into or unthread from the material.
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 included).
7. When drilling a hole, let the tool do the work,
using only enough pressure to follow the
drill as it cuts the hole in the material.
8. When drilling a hard, smooth surface, use a center
punch (not included) to mark the desired hole.
9. When finished using the Drill / Driver, release Trigger
and center Direction Switch to lock Trigger.
10. To prevent accidents, remove tool’s Battery
Pack after use. Clean, then store the
tool indoors out of children’s reach.
Drilling in Wood
1. Use high speed drill bits for wood drilling.
2. Start wood drilling at very low speed
to keep the bit from slipping. Increase
speed as drill bit bites into wood.
3. When drilling through holes, place a block
or wood behind the workpiece to prevent
ragged edges on the back side of the hole.
Drilling in Metal
1. Use high speed drill bits for metal drilling.
2. Start metal drilling at very low speed to keep the bit
from slipping. Maintain the speed and pressure,
allowing for cutting without overheating the bit.
3. When drilling large holes in metal surfaces, use a
small drill bit at first. Then finish with a larger drill
bit. Be sure to lubricate the bit with oil to improve
the drilling action and help increase bit life.
Page 9For technical questions, please call 1-888-866-5797.Items 64370
MAINTENANCE AND SERVICING
Procedures not specifically explained
in this manual must be performed
only by a qualified technician.
TO PREVENT SERIOUS INJURY FROM
ACCIDENTAL OPERATION:
Make sure the Trigger is locked, Battery Pack
is removed, and Charger is unplugged 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 or damage is noted, have
the problem corrected before further use.
Cleaning, Maintenance,
and Lubrication
1. BEFORE EACH USE, inspect the general condition
of the Tool, Charger, and Battery Pack. Check for:
• leaking, swollen, or cracked Battery Pack
• loose hardware
• misalignment or binding of moving parts
• cracked or broken parts
• damaged electrical wiring
• any other condition that may
affect its safe operation.
2. AFTER USE, wipe external surfaces of
the Tool and Charger with clean cloth.
3. Li-ion BATTERY MUST BE RECYCLED OR
DISPOSED OF PROPERLY.
Do not short, incinerate or open battery.
4. Disconnect Battery Pack and store Battery
Pack, Charger, and Tool in dry, indoor
area at room temperature out of reach
of children and away from metal objects
(i.e., paperclips, coins) to prevent shorting.
WARNING! TO PREVENT SERIOUS INJURY AND
DEATH FROM ELECTRIC SHOCK:
Do not open Charger. Do not service internal parts.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference
received, including interference that may
cause undesired operation.
Page 10 For technical questions, please call 1-888-866-5797. Items 64370
Troubleshooting
Problem Possible Causes Likely Solutions
Tool will
not start.
Tool operates
slowly.
Performance
decreases
over time.
Excessive noise
or rattling.
Overheating. 1. Forcing tool to work too fast.
Follow all safety precautions whenever diagnosing or servicing the tool.
1. Battery Pack not properly
connected.
2. Battery Pack not
properly charged.
3. Battery Pack worn out.
4. Internal damage or wear.
(Carbon brushes or
Switch, for example.)
1. Forcing tool to work too fast.
2. Battery Pack wearing out.
1. Carbon brushes worn
or damaged.
2. Bit dull or damaged.
Internal damage or wear. Have technician service tool.
2. Bit dull or damaged.
3. Blocked motor housing vents.
Disconnect Battery Pack and Charger power supply before service.
1. Remove Battery Pack, make sure there are
no obstructions, clean battery contacts on
tool, reinsert the Battery Pack 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.
1. Have qualified technician replace brushes.
2. Keep bits sharp. Replace as needed.
1. Allow tool to work at its own rate.
2. Keep bits sharp. Replace as needed.
3. Wear ANSI-approved safety goggles and
NIOSH-approved dust mask/respirator while
blowing dust out of motor using compressed air.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Replacement parts are not available.
Page 11For technical questions, please call 1-888-866-5797.Items 64370
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.
Email our technical support at: productsupport@harborfreight.com
Visit our website at: http://www.harborfreight.com
For technical questions, please call 1-888-866-5797
Copyright© 2018 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.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • 1-888-866-5797
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