Chicago Electric 67845 Installation manual

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.

Page 2 For technical questions, please call 1-800-444-3353. SKU 67845
CONTENTS
IMPORTANT SAFETY
INFORMATION.................................3
GENERAL POWER TOOL SAFETY
WARNINGS........................................... 3
IMPACT WRENCH SAFETY
WARNINGS........................................... 5
VIBRATION SAFETY .............................. 6
GROUNDING......................................7
DOUBLE INSULATED TOOLS:
TOOLS WITH TWO PRONG PLUGS... 7
EXTENSION CORDS .............................. 7
SYMBOLOGY.......................................... 7
SPECIFICATIONS...............................8
UNPACKING.......................................8
INSTRUCTIONS FOR PUTTING
INTO USE .........................................8
FUNCTIONS............................................ 8
OPERATING INSTRUCTIONS ...........8
TOOL SET UP ......................................... 8
CHARGING THE BATTERY PACK......... 9
WORK PIECE AND WORK AREA
SET UP ................................................. 9
GENERAL OPERATING
INSTRUCTIONS ................................... 9
MAINTENANCE AND SERVICING...11
CLEANING, MAINTENANCE, AND
LUBRICATION.....................................11
TROUBLESHOOTING............................11
PARTS LIST......................................12
ASSEMBLY DIAGRAM.....................13
LIMITED 90 DAY WARRANTY.........14

Page 3For technical questions, please call 1-800-444-3353.SKU 67845
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 Power 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.
The term ″power tool″ in the warnings
refers to your mains-operated (corded)
power tool or battery-operated
(cordless) power tool.
Work area safety1. Keep work area clean and well lit.a. Cluttered or dark areas invite accidents.
Do not operate power tools inb. explosive atmospheres, such as in
the presence of ammable liquids,
gases or dust. Power tools create
sparks which may ignite the dust or
fumes.
Keep children and bystandersc. away while operating a power tool.
Distractions can cause you to lose
control.
Electrical safety2.
Do not expose power tools to rain or
wet conditions. Water entering a power
tool will increase the risk of electric
shock.
Personal safety3. Stay alert, watch what you area. doing and use common sense when

Page 4 For technical questions, please call 1-800-444-3353. SKU 67845
operating a power tool. Do not use
a power tool while you are tired or
under the inuence of drugs, alcohol
or medication. A moment of inattention
while operating power tools may result
in serious personal injury.
Use personal protective equipment.b. Always wear eye protection. Safety
equipment such as dust mask, non-
skid safety shoes, hard hat, or hearing
protection used for appropriate
conditions will reduce personal injuries.
Prevent unintentional starting.c. 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 nger on the
switch or energizing power tools that
have the switch on invites accidents.
Remove any adjusting key or wrenchd. 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.
Do not overreach. Keep propere. footing and balance at all times. This
enables better control of the power tool
in unexpected situations.
Dress properly. Do not wear loosef. 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.
If devices are provided for theg. connection of dust extraction and
collection facilities, ensure these are
connected and properly used. Use of
these devices can reduce dust-related
hazards.
Only use safety equipment that hash. 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 specic hazards in the work area.
Power tool use and care4. Do not force the power tool. Usea. 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.
Do not use the power tool if theb. switch does not turn it on and off.
Any power tool that cannot be controlled
with the switch is dangerous and must
be repaired.
Disconnect the plug from the powerc. 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.
Store idle power tools out of thed. 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.
Maintain power tools. Check fore. 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.
Use the power tool, accessoriesf. and tool bits etc. in accordance
with these instructions, taking into
account the working conditions and
the work to be performed. Use of

Page 5For 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.
Battery tool use and care5. Recharge only with the chargera.
specied by the manufacturer. A
charger that is suitable for one type of
battery pack may create a risk of re
when used with another battery pack.
Use power tools only withb.
specically designated battery
packs. Use of any other battery packs
may create a risk of injury and re.
When battery pack is not in use, keepc. 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 re.
Under abusive conditions, liquidd. may be ejected from the battery;
avoid contact. If contact accidentally
occurs, ush with water. If liquid
contacts eyes, additionally seek
medical help. Liquid ejected from the
battery may cause irritation or burns.
Service6. Have your power tool serviced by aa.
qualied repair person using only
identical replacement parts. This will
ensure that the safety of the power tool
is maintained.
Impact Wrench Safety Warnings
Maintain labels and nameplates on1. the tool. These carry important safety
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
Avoid unintentional starting. Prepare to2. begin work before turning on the tool.
Do not lay the tool down until it has come
3. to a complete stop. Moving parts can
grab the surface and pull the tool out of
your control.
When using a handheld power tool,
4.

hands to resist starting torque.
5. The battery charger gets hot
during use. The charger’s
heat can build up to unsafe

if it does not receive adequate
ventilation, due to an electrical fault, or if
it is used in a hot environment.

surface. Do not obstruct any vents on
the charger. Especially avoid placing
the charger on carpets and rugs; they
are not only ammable, but they also
obstruct vents under the charger.
Place the charger on a stable, solid,



objects, such as drapes or walls. Keep a

the area. Frequently monitor the charger
and battery while charging.
This product is not a toy. Keep it out of6. reach of children.
People with pacemakers should7. consult their physician(s) before use.

to heart pacemaker could cause
pacemaker interference or pacemaker
failure. In addition, people with
pacemakers should:


on.


Page 6 For technical questions, please call 1-800-444-3353. SKU 67845
electrical shock.

grounded. Ground Fault Circuit
Interrupter (GFCI) should also be
implemented – it prevents sustained
electrical shock.
WARNING: Some dust created by power
8. 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:


cement or other masonry products

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

microscopic particles. (California Health
& Safety Code § 25249.5, et seq.)
WARNING: Handling the Battery9. 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.)
The warnings, precautions, and10. 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

cause temporary or permanent physical
injury, particularly to the hands, arms
and shoulders. To reduce the risk of

Anyone using vibrating tools regularly1.

be examined by a doctor and then have

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

possible.
Do not smoke during use. Nicotine2. reduces the blood supply to the hands


Wear suitable gloves to reduce the3. vibration effects on the user.
Use tools with the lowest vibration when4. there is a choice.
5. of work.
Grip tool as lightly as possible (while still6.

do the work.
To reduce vibration, maintain the tool7. as explained in this manual. If any
abnormal vibration occurs, stop use
immediately.

Page 7For technical questions, please call 1-800-444-3353.SKU 67845
SAVE THESE
INSTRUCTIONS.
GROUNDING
TO PREVENT
ELECTRIC SHOCK
AND DEATH FROM INCORRECT
GROUNDING WIRE
CONNECTION:
Check with a qualied 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 t
the outlet, have a proper outlet
installed by a qualied
electrician.
Double Insulated Tools: Tools with
Two Prong Plugs
Outlets for 2-Prong Plug
Battery Chargers marked “Double1. Insulated” do not require grounding.
They have a special double insulation

requirements and complies with the
applicable standards of Underwriters

Standard Association, and the National
Electrical Code.
Double insulated tools may be used in
2. either of the 120 volt outlets shown in the
preceding illustration. (See Outlets for
2-Prong Plug.)
Extension Cords
Note: Extension cords must not be used with
this item’s charger.
Symbology
Double Insulated
Canadian Standards Association

V~ Volts Alternating Current
AAmperes
n0xxxx/min. 
(RPM)

Page 8 For technical questions, please call 1-800-444-3353. SKU 67845
SPECIFICATIONS
Battery Pack 18 V / NiCd / 1700 mAh
Speed 
Average
Torque  
Drive 1/2” Square Drive
Bolt Capacity 1/2” (13 mm)
UNPACKING
When unpacking, make sure that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor

possible.
INSTRUCTIONS FOR PUTTING
INTO 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.
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
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.
Note: For additional information regarding the
parts listed in the following pages, refer
to the Assembly Diagram near the end of
this manual.
Functions
Figure 1
Trigger (27) Handle
Housing, right & left
(24 & 28)
Battery Pack (35)
Battery Pack
Release Button
Impact Anvil (6)
Forward/Reverse

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:
Turn the Power Switch of the tool
off and unplug the tool from its
electrical outlet before adjusting
tool or installing accessories.

Page 9For technical questions, please call 1-800-444-3353.SKU 67845
Charging the Battery Pack
Figure 2
Charger (36) Adapter (37)
 Flanges
1. Plug the Adapter (37) into a 120V wall
outlet.
Charger (36)Battery Pack (35)
Flange
Figure 3
2. 
with the slots on the Battery Pack (35)
and slide the Charger onto the Battery
Pack.
Figure 4
Charger (36)Adapter (37)
Battery Pack (35)
Adapter
Cord
3. Plug the Adapter cord into the Charger.
The light on the Charger will turn on,
indicating that the Battery Pack is
Charging.
4. the Adapter from the wall and the
Charger, and remove the Charger from
the Battery Pack.
Allow the components to cool if they
5. are warm or hot to the touch. Store the
Adapter and Charger in the Storage
Case (38).
CAUTION: Do not leave the Battery Pack
charging for more than 5 hours or the
Battery Pack may become damaged.
Note: Initial charge and recharging is
approximately the same amount of time.
Work Piece and Work Area Set Up
Designate a work area that is clean and1.

access by children or pets to prevent
distraction and injury.
Secure loose work pieces using a vise2. or clamps (not included) to prevent
movement while working.
There must not be objects, such as utility3.

while working.
General Operating Instructions
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”
Only use socket extensions designed for impact use.
To lock the Trigger (27), center the


tool.

Page 10 For technical questions, please call 1-800-444-3353. SKU 67845
To set the Impact Anvil (6) to turn forward (clockwise), press the right

until it clicks into place.
To set the Impact Anvil (6) to turn in Reverse (counterclockwise), press the

(26) until it clicks into place.
CAUTION: To prevent possible gear damage,
always allow the Impact Anvil (6) to come
to a complete stop before changing the
direction of rotation.
Basic Operation
Charge the Battery Pack, but do not1. attach it to the Impact Wrench yet.
2. to lock the Trigger (27).
Slide the desired socket (sold separately)3. onto the Impact Anvil (6).
Figure 5
Flange
Impact Wrench
Battery Pack (35)
4. 
Impact Wrench with the slots on the
Battery Pack (35), and slide the Impact
Wrench onto the Battery Pack.
Set the desired direction of the Impact5.

(26).
Position the socket over the fastener.6.
7. and the top of the Housing (24 & 28)

Trigger (27).
Note: This tool has a variable speed and

tightly will increase the speed and torque
of the tool.
After tightening a fastener, check the
8. torque with a torque wrench to make
sure the fastener is secure.
9.

To remove the Battery Pack (35), press10. in on both buttons on the side of the
Battery Pack and slide the Impact
Wrench off of the Battery Pack.
Store the tool and Battery Pack (35)11. in it’s Storage Case (38), away from
children.
“Breaking Loose” Fasteners
To loosen a fastener which has become

Spray silicon or another appropriate1. lubricant (sold separately) on the

minutes.
Position the socket over the fastener,2. then operate the Impact Wrench for short

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.

Page 11For technical questions, please call 1-800-444-3353.SKU 67845
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:
Turn the Power Switch of the tool
off and unplug the tool from its
electrical outlet 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.
Periodically have the carbon brushes3.

needed.
NiCd4. 
 Do not
short, incinerate or open battery.
5. WARNING! If the supply cord of
this power tool is damaged, it must be
replaced only by a qualied service
technician.
Troubleshooting
Problem Possible Causes Likely Solutions
Tool will not start. Battery Pack not charged.1. Internal damage or wear.2. (Carbon brushes or switch, for
example.)
Charge the Battery Pack.1. Have technician service tool.2.
Performance
decreases over time. Carbon brushes worn or damaged. 
Excessive noise or
rattling. Internal damage or wear. (Carbon brushes or bearings, for example.) Have technician service tool.
 Forcing tool to work too fast.
1. Socket misaligned.2. Blocked motor housing vents.3. Allow tool to work at its own rate.1. Check and correct socket placement on tool.2.
3. 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.

Page 12 For technical questions, please call 1-800-444-3353. SKU 67845
Part Description Qty
1 Screw M4 x 25 4
2 Impact Cap 1
3 Felt Washer 1
4 Needle Bearing HKH1816 1
5 Plastic Washer 1
6 Impact Anvil 1
7 Impact Block Assembly 1
8 Planetary Gear 3
9 Pin Ø5 x 15.6 3
10 Flat Washer 1
11 Ring Gear 1
12  1
13 Screw M5 x 10 2
14  2
15 Ring Gear Case 1
16 Motor Pinion 1
17 Motor 1
18 Electric Wire (115mm, 16 awg) 1
19 Electric Wire (115mm, 16 awg) 1
Part Description Qty
20  1
21 Electric Wire (40mm, 24 awg) 1
22 Resistor 1
23 Electric Wire (90mm) 1
24 Housing (Right) 1
25 Screw M3 x 14 7
26  1
27 Trigger 1
28  1
29 Spacer 1
30 Screw M3.5 x 7 1
31 Electric Wire (115mm, 16 awg) 1
32 Electric Wire (115mm, 16 awg) 1
33 Terminal 1
34 Strap 1
35 Battery Pack 1
36 Charger 1
37 Adapter 1
38 Storage Case (not shown) 1
PLEASE READ THE FOLLOWING CAREFULLY









PARTS LIST

Page 13For technical questions, please call 1-800-444-3353.SKU 67845
ASSEMBLY DIAGRAM
35
36
37

Page 14 For technical questions, please call 1-800-444-3353. SKU 67845
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.

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

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.

vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • [phone]
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.