18V Cordless 1/2”
ImpaCt WrenCh
model 67845
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 2010 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.
notICe is used to
address practices not
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.
related to personal injury.
CautIon, without the
safety alert symbol, is
used to address practices not
related to personal injury.
general power tool safety Warnings
WarnIng read all safety warnings
and instructions. Failure to follow the
warnings and instructions 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.
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.
1. 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.
danger indicates a
hazardous situation
which, if not avoided, will result
in death or serious injury.
c. keep children and bystanders
away while operating a power tool.
Distractions can cause you to lose
control.
WarnIng indicates a
hazardous situation
which, if not avoided, could
result in death or serious injury.
2. electrical safety
CautIon, used with
the safety alert
symbol, indicates a hazardous
situation which, if not avoided,
could result in minor or moderate
injury.
do not expose power tools to rain or
wet conditions. Water entering a power
tool will increase the risk of electric
shock.
3. personal safety
a. stay alert, watch what you are
doing and use common sense when
SKU 67845
For technical questions, please call 1-800-444-3353.
Page 3
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.
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.
4. power tool use and care
b. use personal protective equipment.
always wear eye protection. Safety
equipment such as dust mask, non-
skid safety shoes, hard hat, or hearing
protection used for appropriate
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.
conditions will reduce personal injuries.
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. 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.
c. disconnect the plug from the power
source and/or the battery pack 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. 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.
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. 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.
e. maintain power tools. 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.
g. If devices are provided for the
connection of dust extraction and
collection facilities, ensure these are
connected and properly used. Use of
these devices can reduce dust-related
hazards.
f. 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
h. only use safety equipment that has
been approved by an appropriate
standards agency. Unapproved
Page 4
For technical questions, please call 1-800-444-3353.
SKU 67845
the power tool for operations different
from those intended could result in a
hazardous situation.
2. Avoid unintentional starting. Prepare to
begin work before turning on the tool.
3. 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.
5. battery tool use and care
a. 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. When using a handheld power tool,
maintain a firm grip on the tool with both
hands to resist starting torque.
b. use power tools only with
5.
The battery charger gets hot
during use. The charger’s
heat can build up to unsafe
levels and create a fire hazard
specifically designated battery
packs. Use of any other battery packs
may create a risk of injury and fire.
c. 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.
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 while charging.
d. 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.
6. 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.
6. This product is not a toy. Keep it out of
reach of children.
7. 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. In addition, people with
pacemakers should:
Impact Wrench safety Warnings
1. Maintain labels and nameplates on
the tool. These carry important safety
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
• Avoid operating alone.
• Do not use with power switch locked
on.
• Properly maintain and inspect to avoid
SKU 67845
For technical questions, please call 1-800-444-3353.
Page 5
electrical shock.
Vibration safety
• Any power cord must be properly
grounded. Ground Fault Circuit
Interrupter (GFCI) should also be
implemented – it prevents sustained
electrical shock.
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:
8. WARNING: Some dust created by power
sanding, sawing, grinding, drilling, and
other construction activities, contains
chemicals known [to the State of
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
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
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.
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 filter out
microscopic particles. (California Health
& Safety Code § 25249.5, et seq.)
2. Do not smoke during use. Nicotine
reduces the blood supply to the hands
and fingers, increasing the risk of
vibration-related injury.
9. WARNING: Handling the Battery
Charger cord on this 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.)
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.
10. 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.
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.
Page 6
For technical questions, please call 1-800-444-3353.
SKU 67845
Standard Association, and the National
Electrical Code.
saVe these
InstruCtIons.
2. Double insulated tools may be used in
either of the 120 volt outlets shown in the
preceding illustration. (see outlets for
2-prong plug.)
groundIng
to preVent
eleCtrIC shoCk
and death From InCorreCt
groundIng WIre
extension Cords
note: Extension cords must not be used with
ConneCtIon:
this item’s charger.
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 tool.
never remove the grounding
prong from the plug. do not use
the tool 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
symbology
Double Insulated
Canadian Standards Association
Underwriters Laboratories, Inc.
Volts Alternating Current
V~
a
electrician.
Amperes
double Insulated tools: tools with
two prong plugs
No Load Revolutions per Minute
(RPM)
n xxxx/min.
0
outlets for 2-prong plug
1. Battery Chargers marked “Double
Insulated” do not require grounding.
They have a special double insulation
system which satisfies OSHA
requirements and complies with the
applicable standards of Underwriters
Laboratories, Inc., the Canadian
SKU 67845
For technical questions, please call 1-800-444-3353.
Page 7
Functions
speCIFICatIons
Housing, right & left
(24 & 28)
Battery Pack 18 V / NiCd / 1700 mAh
Impact Anvil (6)
Speed
0 - 2,100 RPM / 3,000 BPM (No Load)
Average
Torque
205 ft-lbs Forward (clockwise)
211 ft-lbs Reverse (counterclockwise)
Drive
1/2” Square Drive
Bolt Capacity 1/2” (13 mm)
Forward/Reverse
Lever (26)
unpaCkIng
Trigger (27)
Handle
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.
Battery Pack (35)
Battery Pack
Release Button
Figure 1
InstruCtIons For puttIng
Into use
read the entIre Important
saFetY InFormatIon
operatIng InstruCtIons
section at the beginning of this
manual including all text under
subheadings therein before set up
or use of this product.
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.
to preVent
serIous InjurY
From aCCIdental
operatIon:
tool set up
turn the power switch of the tool
off and unplug the tool from its
electrical outlet before
assembling or making any
adjustments to the tool.
to preVent
serIous InjurY
From aCCIdental
operatIon:
turn the power switch of the tool
off and unplug the tool from its
electrical outlet before adjusting
tool or installing accessories.
note: For additional information regarding the
parts listed in the following pages, refer
to the Assembly Diagram near the end of
this manual.
Page 8
For technical questions, please call 1-800-444-3353.
SKU 67845
4. Charge for 2-1/2 to 3 hours, then unplug
the Adapter from the wall and the
Charger, and remove the Charger from
the Battery Pack.
Charging the battery pack
Adapter (37)
Charger (36)
5. Allow the components to cool if they
are warm or hot to the touch. Store the
Adapter and Charger in the Storage
Case (38).
Flanges
LED Light
CautIon: Do not leave the Battery Pack
charging for more than 5 hours or the
Battery Pack may become damaged.
Figure 2
1. Plug the Adapter (37) into a 120V wall
outlet.
note: Initial charge and recharging is
approximately the same amount of time.
Battery Pack (35)
Charger (36)
Work piece 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.
Flange
2. Secure loose work pieces using a vise
or clamps (not included) to prevent
movement while working.
Figure 3
2. Align the flanges on the Charger (36)
with the slots on the Battery Pack (35)
and slide the Charger onto the Battery
Pack.
3. There must not be objects, such as utility
lines, nearby that will present a hazard
while working.
general operating Instructions
Adapter (37)
Battery Pack (35)
Charger (36)
• only use sockets designed for
impact wrench use.
• Do not use sockets with drives smaller
than 1/2”. You may use impact socket
adapters to use impact sockets with
drives greater than 1/2”.
• Do not exceed recommended bolt
capacity of 1/2”
Adapter
Cord
• only use socket extensions
designed for impact use.
Figure 4
3. Plug the Adapter cord into the Charger.
The light on the Charger will turn on,
indicating that the Battery Pack is
Charging.
• To lock the Trigger (27), center the
Forward/Reverse Lever (26) on the
tool.
SKU 67845
For technical questions, please call 1-800-444-3353.
Page 9
• To set the Impact Anvil (6) to turn
forward (clockwise), press the right
side of the Forward/Reverse Lever (26)
until it clicks into place.
5. Set the desired direction of the Impact
Anvil (6) with the Forward/Reverse Lever
(26).
6. Position the socket over the fastener.
• To set the Impact Anvil (6) to turn in
Reverse (counterclockwise), press the
left side of the Forward/Reverse Lever
(26) until it clicks into place.
7. Holding the handle firmly with one hand
and the top of the Housing (24 & 28)
with your other hand, gently squeeze the
Trigger (27).
CautIon: To prevent possible gear damage,
always allow the Impact Anvil (6) to come
to a complete stop before changing the
direction of rotation.
note: This tool has a variable speed and
torque. Squeezing the Trigger more
tightly will increase the speed and torque
of the tool.
basic operation
8. After tightening a fastener, check the
torque with a torque wrench to make
sure the fastener is secure.
1. Charge the Battery Pack, but do not
attach it to the Impact Wrench yet.
2. Center the Forward/Reverse Lever (26)
9. When finished using the Impact Wrench,
to lock the Trigger (27).
center the Forward/Reverse Lever (26).
3. Slide the desired socket (sold separately) 10. To remove the Battery Pack (35), press
onto the Impact Anvil (6).
in on both buttons on the side of the
Battery Pack and slide the Impact
Wrench off of the Battery Pack.
11. Store the tool and Battery Pack (35)
in it’s Storage Case (38), away from
children.
“breaking loose” Fasteners
Impact Wrench
To loosen a fastener which has become
Battery Pack (35)
“frozen”, typically due to corrosion:
1. Spray silicon or another appropriate
lubricant (sold separately) on the
fastener and allow it to sit for 15-30
minutes.
Flange
Figure 5
2. Position the socket over the fastener,
then operate the Impact Wrench for short
intervals, first in one direction, then the
other direction to loosen the bolt. Be
sure to let the Impact Anvil (6) come to
a compete stop, before changing the
direction of rotation.
4. Align the flanges on the bottom of the
Impact Wrench with the slots on the
Battery Pack (35), and slide the Impact
Wrench onto the Battery Pack.
Page 10
For technical questions, please call 1-800-444-3353.
SKU 67845
Cleaning, maintenance, and
lubrication
maIntenanCe and
serVICIng
1. beFore eaCh use, 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.
Procedures not specifically
explained in this manual must
be performed only by a qualified
technician.
to preVent
serIous InjurY
From aCCIdental
2. aFter use, wipe external surfaces of
operatIon:
the tool with clean cloth.
turn the power switch of the tool
off and unplug the tool from its
electrical outlet before
performing any inspection,
maintenance, or cleaning
procedures.
3. Periodically have the carbon brushes
replaced by a qualified technician as
needed.
4. NiCd BATTERy MUST BE RECyCLED
OR DISPOSED OF PROPERLy. Do not
short, incinerate or open battery.
to preVent serIous InjurY
From tool FaIlure:
5.
WarnIng! If the supply cord of
this power tool is damaged, it must be
replaced only by a qualified service
technician.
do not use damaged equipment.
If abnormal noise or vibration
occurs, have the problem
corrected before further use.
troubleshooting
problem
Tool will not start.
possible Causes
1. Battery Pack not charged.
likely solutions
1. Charge the Battery Pack.
2. Internal damage or wear.
(Carbon brushes or switch, for
example.)
2. Have technician service tool.
Performance
Carbon brushes worn or damaged. Have qualified technician replace brushes.
decreases over time.
Excessive noise or Internal damage or wear. (Carbon
Have technician service tool.
rattling.
Overheating.
brushes or bearings, for example.)
1. Forcing tool to work too fast.
1. Allow tool to work at its own rate.
2. Socket misaligned.
2. Check and correct socket placement on tool.
3. Blocked motor housing vents.
3. 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 power supply before service.
SKU 67845
For technical questions, please call 1-800-444-3353.
Page 11
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
part
description
Qty
4
1
1
1
1
1
1
3
part
description
Qty
1
1
1
1
1
7
1
1
1
2
3
4
5
6
7
8
9
Screw M4 x 25
Impact Cap
20 LED Lamp
21 Electric Wire (40mm, 24 awg)
22 Resistor
Felt Washer
Needle Bearing HKH1816
Plastic Washer
Impact Anvil
Impact Block Assembly
Planetary Gear
Pin Ø5 x 15.6
23 Electric Wire (90mm)
24 Housing (Right)
25 Screw M3 x 14
26 Forward/Reverse Lever
27 Trigger
3
1
28 Housing (Left)
29 Spacer
1
1
10 Flat Washer
11 Ring Gear
12 Ball Bearing 6003zz
13 Screw M5 x 10
1
1
2
2
30 Screw M3.5 x 7
31 Electric Wire (115mm, 16 awg)
32 Electric Wire (115mm, 16 awg)
33 Terminal
1
1
1
1
14 Lock Washer
15 Ring Gear Case
16 Motor Pinion
1
1
34 Strap
35 Battery Pack
1
1
17 Motor
1
36 Charger
1
18 Electric Wire (115mm, 16 awg)
19 Electric Wire (115mm, 16 awg)
1
1
37 Adapter
38 Storage Case (not shown)
1
1
Page 12
For technical questions, please call 1-800-444-3353.
SKU 67845
assemblY dIagram
36
37
35
SKU 67845
For technical questions, please call 1-800-444-3353.
Page 13
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.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
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 14
For technical questions, please call 1-800-444-3353.
SKU 67845
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