12 VOLT IMPACT WRENCH
Model 92349
ASSEMBLY AND OPERATING INSTRUCTIONS
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
©
®
Copyright 2004 by Harbor Freight Tools . All rights reserved. No portion of this
manual or any artwork contained herein may be reproduced in any shape or form
without the express written consent of Harbor Freight Tools.
For technical questions and replacement parts, please call 1-800-444-3353.
9.
Maintain tools with care. Keep tools clean for better and safer performance. Follow
instructions for lubricating and changing accessories. Inspect tool cords periodically
and, if damaged, have them repaired by an authorized technician. The handle must
be kept clean, dry, and free from oil and grease at all times.
10. Disconnect power. Unplug tool when not in use.
11. Avoid unintentional starting. Be sure the Trigger is in the Off position when not in
use and before plugging in. Do not carry any tool with your finger on the trigger,
whether it is plugged in or not.
12. Stay alert. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
13. Check for damaged parts. Before using any tool, any part that appears damaged
should be carefully checked to determine that it will operate properly and perform its
intended function. Check for alignment and binding of moving parts; any broken parts
or mounting fixtures; and any other condition that may affect proper operation. Any
part that is damaged should be properly repaired or replaced by a qualified
technician. Do not use the tool if any Trigger does not operate properly.
14. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures. Use caution near batteries and
starters.
15. Replacement parts and accessories. When servicing, use only identical
replacement parts. Use of any other parts will void the warranty. Only use accessories
intended for use with this tool. Approved accessories are available from Harbor
Freight Tools.
16. Do not operate tool if under the influence of alcohol or drugs. Read warning
labels if taking prescription medicine to determine if your judgment or reflexes are
impaired while taking drugs. If there is any doubt, do not operate the tool.
17. Maintenance. For your safety, service and maintenance should be performed
regularly by a qualified technician.
18. People with pacemakers should consult their physician(s) before using this
product. Electromagnetic fields in close proximity to a heart pacemaker could cause
interference to or failure of the pacemaker.
19. Use this tool with both hands. This tool requires the use of both hands when
operating. This helps maintain tool stability and keeps hands away from the working
area of the tool.
20. This unit should only be powered by 12 Volt DC systems.
Note: Performance of this tool may vary depending on variations in battery power.
Warning:The warnings, cautions, and instructions discussed in this instruction manual
cannot cover all possible conditions and situations that may occur. It must be under-
stood by the operator that common sense and caution are factors which cannot be
built into this product, but must be supplied by the operator.
SKU 92349
For technical questions, please call 1-800-444-3353
Page 3
Unpacking
When unpacking, check to make sure the parts listed on page 7 are included. If any parts
are missing or broken, please call Harbor Freight Tools at the number on the cover of this
manual as soon as possible.
Operation
WARNING! Running engines produce carbon monoxide, an odorless, colorless gas that is
extremely toxic. Exposure to carbon monoxide can result in headaches, dizziness, vomiting,
and even death. The engine must only be run in an open, well-ventilated place.
1.
Prior to use, be sure that your vehicle or other work object is safely secured in preparation
for maintenance.
2.
3.
This tool operates on 12 Volts DC. Do not attempt to use this tool with any other voltage.
You may connect to the 12 Volt power source by directly plugging in the 12 Volt Plug-In
(24) to the vehicle’s receptacle, or, you may use the Battery Adapter Cable. To use the
Battery Adapter Cable, simply insert the 12 Volt Plug-In into the Adapter. When it is safe
to do so, connect the RED clamp to the POSITIVE terminal of a 12 volt battery. Connect
the BLACK clamp to a clean grounded part of the vehicle such as the engine block or
frame member. NEVER leave either clamp attached to the vehicle while the impact
wrench is not being used; disconnect clamps immediately as soon as work is
finished. Also, make certain that neither clamp can come into contact with any
other wire or metal portion of the vehicle’s engine. See FIGURE 1.
NOTE: If the engine is left running while performing this operation, be sure to avoid placing
any cables or clamps, or your hands, clothes, hair or any other appendage in close proximity
to the moving parts of the engine.
FIGURE 2
FIGURE 1
Clamp
Anvil (4)
Trigger (26)
Adapter (40)
12 Volt
Plug-In (24)
12 Volt
Plug-In (24)
SKU 92349
For technical questions, please call 1-800-444-3353
Page 4
Operation (continued)
WARNING: Working around vehicle engines whether running or not is inherently dangerous,
and extraordinary precautions outside the scope of this booklet are required. Refer to the
owner’s manual of your vehicle for more information.
4.
NOTE: Unlike air-operated or 120V AC impact wrenches, this wrench will build up
inertia before striking a blow.This is normal,and DOES NOT INDICATE A PROBLEM.
5.
Make sure the vehicle is parked safely away from all other moving traffic. Be sure the
vehicle is parked on a flat, dry, level surface. Be sure the vehicle’s emergency brake is
set, and the tires have wheel blocks preventing movement.
6.
7.
Select the appropriate size socket to fit the wheel lug nut.Attach the socket to the Impact
Wrench by pressing them on to the Anvil (4). Only use impact sockets and attachments.
Position an appropriate lift (not included) under the lift point for each wheel to be re-
moved. (Follow the vehicle and lift manufacturer’s instructions for doing so.) Lift the
vehicle until the wheel is off the ground, and support the vehicle securely on jack stands
(not included).
8.
The Impact Wrench is reversible. To operate the Impact Wrench in a forward (tightening)
direction, set the Directional Lever toward the “R” symbol - see FIGURE 3. To operate
the Impact Wrench in reverse direction, set the Directional Lever toward the “L” symbol.
If the Directional Lever is set in the middle, the unit will not turn in either direction. Using
the ImpactWrench in reverse, remove the wheel lug nuts according to the manufacturer’s
recommendations. (In most cases, the manufacturer will recommend that you remove
the lugs in an alternate pattern, moving around the wheel.)
FIGURE 3
Directional
Lever
Trigger (26)
LED (27)
Note: For night use, this Impact
Wrench has a LED (27)
light. See FIGURE 4.
FIGURE 4
SKU 92349
For technical questions, please call 1-800-444-3353
Page 5
Operation (continued)
9.
Occasionally, you will have to manually break a nut loose before you can remove it with
the Impact Wrench. To do so, use a Breaker Bar (not included) and Socket to break the
nut loose. Then, proceed as discussed in number 8 on page 5.
10. Replace the wheel on the vehicle hub, aligning the wheel studs with the bolt holes in the
wheel.
11. Install the wheel lug nuts, following the vehicle manufacturer’s recommendations. To
avoid cross-threading the lug nuts, thread the nuts on by hand first, before using the
Impact Wrench.
CAUTION
Do not use the Impact Wrench to tighten the lug nuts.
The torque may exceed the vehicle specifications and damage may result.
12. When the wheel is securely refastened, use a torque wrench (not included) to check the
torque on all bolts and ensure that the tightness meets the manufacturer’s recommen-
dations. Check under the vehicle and remove any tools. Lower the vehicle, disconnect
the tool and replace the lift and the Impact Wrench to their storage places.
Maintenance
1.
When not in use, store your Impact Wrench and its accessories in its case, in a se-
cure, dry place. Protect it from water, moisture, oil, fuel, grease or other foreign
materials which may damage the case, moving parts, or electrical components.
2.
3.
This tool should only be repaired by a qualified technician.
The 12 Volt Plug-In (24) assembly has a fuse that will eventually need replacing.
Remove the Cap at the end of the Plug-In and replace the fuse making sure to re-
place the pieces below, in the exact same order as shown. Only replace the fuse
with another 12A-250V fuse of the same style.
12 Volt
Plug-In (24)
Cap
Fuse
SKU 92349
For technical questions, please call 1-800-444-3353
Page 6
Parts List
Part No.
1
Description
Bearing
Part No.
21
Description
Bolt
2
3
4
5
6
7
Anvil Bearing
Radial Bearing
Anvil
Oil Bearing
Rachet Wheel Base
Wheel
22
23
24
25
26
27
Cable Block
Cable Bushing
12V Plug-In
Left Housing
Trigger
LED
8
9
Wheel Tray
Pull Spring
28
29
Bolt
Wheel
10
11
12
13
14
15
16
17
18
19
20
Wheel Brace
Rachet Wheel Bearing
Pedestal Bearing
Gear
30
31
32
33
34
35
36
37
Pull Spring
Bolt
Bolt
Pawl
Rod
7/8” Socket
13/16” Socket
3/4” Socket
11/16” Socket
Bolt
Gear Shaft
Drive Wheel
Motor Gear Wheel
Gear Box Lid
Bolt
Right Housing
Motor
38
39
40
Battery Adapt. Cable
PLEASE READTHE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-
TOR MAKES ANY REPRESENTATION ORWARRANTY OF ANY KINDTO THE BUYERTHAT 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 STATESTHAT 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.
NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
SKU 92349
For technical questions, please call 1-800-444-3353
Page 7
Assembly Drawing
23
19
24
22
18
17
20
16
14
21
13
15
12
11
10
9
7
8
25
6
28
29
26
30
31
5
4
38
27
32
37
33
34
3
36
2
1
35
39
Note: The Battery Adapter Cable (40) is not shown.
NOTE: Some parts are listed and shown for illustration purposes only, and are not
available individually as replacement parts.
SKU 92349
For technical questions, please call 1-800-444-3353
Page 8
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