3/8” IMPACT WRENCH
Model 93296
ASSEMBLY AND OPERATING
INSTRUCTIONS
Due to continuing improvements, actual product may differ slightly from the product described herein.
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
©
®
Copyright 2005 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.
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9. Maintain tools with care. Keep tools clean for better and safer performance. Follow
instructions for lubricating and changing accessories. Inspect tool cords and air hoses
periodically and, if damaged, have them repaired by an authorized technician. The
handles must be kept clean, dry, and free from oil and grease at all times.
10. Disconnect air supply. Disconnect air hose when not in use.
11. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are
removed from the tool or machine work surface before plugging it in.
12. Avoid unintentional starting. Be sure the trigger is released 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.
13. Stay alert. Watch what you are doing, use common sense.Do not operate any tool when
you are tired.
14. 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 switch does not turn On and Off properly.
15. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures.
16. 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.
17. Do not operate tool if under the influence of alcohol or drugs. Read warning labels if
taking prescription medicine to determine if your judgement or reflexes are impaired
while taking drugs. If there is any doubt, do not operate the Impact Wrench.
18. Use proper size and type extension cord. If an extension cord is required, it must be of
the proper size and type to supply the correct current to the compressor without heating
up. Otherwise, the extension cord could melt and catch fire, or cause electrical damage
to the compressor. Check your air compressor’s manual for the appropriate size cord.
19. Maintenance. For your safety, maintenance should be performed regularly by a qualified
technician.
20. Compressed air only. Never use combustible gas as a power source.
21. This ImpactWrench should only be used with impact sockets and extensions. Using
any other accessories can cause the accessories to break, causing permanent damage
to the unit and severe injury to the operator.
Note: Performance of the compressor (if powered by line voltage) may vary depending on
variations in local line voltage. Extension cord usage may also affect tool performance.
SKU 93296
For technical questions, please call 1-800-444-3353
Page 3
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Warning:The warnings, cautions, 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.
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
Impact
Wrench
For best service you should incorporate an oiler, regulator, and inline filter, as shown in the
diagram above. Hoses, couplers, oilers, regulators, and filters are all available at Harbor
Freight Tools.
1.
You will need to prepare a 1/4” air connector (not included) to connect to the Air Inlet
(29) on the Impact Wrench. First, wrap the 1/4” air connector with pipe thread seal tape
before threading it into the Air Inlet (29). Connect the 3/8” ID Air Source Hose to a quick
connect coupler (not included), and then to the Impact Wrench.
Note: If you are not using an automatic oiler system, before operation, add a few drops
of Pneumatic Tool Oil to the airline connection. Add a few drops more after each hour
of continual use.
2.
3.
Set the air pressure on the regulator to 90 PSI. Do not exceed the recommended air
pressure of 90 PSI.
Check the air connection for leaks. Disconnect from the air source.
SKU 93296
For technical questions, please call 1-800-444-3353
Page 4
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Operation (continued)
Refer to the illustration on page 6, and the Assembly Drawing on page 8.
Note: Turn off your air compressor and disconnect the air hose when you are changing sockets.
After you attach the socket, attach the air hose and turn the air compressor on.
4.
5.
6.
Select the appropriate size 3/8” drive socket for your needs.
Push and snap the socket (not included) onto the Anvil (6).
Turn the Air Regulator (32) in the direction indicated by the H arrow on the Regulator to
increase the power. Turn it toward the L arrow to decrease the power.
Note: Set the Reverse Lever (38) to the left, so that the anvil turns clockwise (forward).
7.
8.
9.
Tighten the nut as tight as you can by hand.
Place the socket (not included) over the nut you wish to tighten.
Grip the Impact Wrench firmly with two hands and gently squeeze the Trigger (34).
Note: If the Impact Wrench cannot tighten the nut to your satisfaction, do not raise the air
pressure on the compressor over 90 PSI. Pressures above 90 PSI will strip the
workpiece and damage the tool, potentially causing the tool to fail, causing serious
injury. Use other appropriate methods and tools to tighten the nut.
10.
When the nut is tightened, release the Trigger (34). Turn off the air compressor and
disconnect the hose.
11.
If available, check the recommended torque specification for the nut. Use a torque
wrench to tighten the nut to the proper setting after using the Impact Wrench.
Loosening
Note: Set the Reverse Lever (38) to the right, so that the anvil turns counterclockwise (reverse).
12.
13.
Place the socket (not included) over the nut you wish to loosen.
Grip the Impact Wrench firmly with two hands and gently squeeze the Trigger (34).
Note: If the Impact Wrench cannot loosen the nut, do not raise the air pressure on the
compressor over 90 PSI. Do not attempt to loosen the nut with the Impact Wrench. Use
other appropriate methods and tools to loosen the nut.
14.
When the nut is loosened, release the Trigger (34). Turn off the air compressor and
disconnect the hose.
15.
If needed, remove the nut from the socket.
SKU 93296
For technical questions, please call 1-800-444-3353
Page 5
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Maintenance
1.
Make sure your Impact Wrench is disconnected from the air hose before attempting any
maintenance.
2.
3.
Wipe the Impact Wrench down with a lint free cloth after each use.
Make sure the Anvil (6) is clear of dirt or debris. If possible, spray it with compressed air
before each use.
4.
5.
Periodically, add a high quality machine oil to the oil inlet by removing the Oil Screw
(39). See illustration, below.
If you do not use an inline oiler/filter system, lubricate the tool daily by holding it so that
the Air Inlet (29) is facing up. Squeeze theTrigger (34), and place one or two drops of oil
into the Air Inlet (29). Squeezing the Trigger (34) allows the oil to circulate in the motor.
Anvil (6)
Oil Screw
(39)
Trigger (34)
Air Regulator (32)
Air Inlet (29)
SKU 93296
For technical questions, please call 1-800-444-3353
Page 6
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Parts List
Part
Description
Q'ty
Part
Description
Q'ty
4
1
2
3
4
5
6
7
8
9
Motor
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
1
1
1
1
1
1
4
23 Cap Washer
Oil Seal
"O" Ring
24 Screw
1
25 Valve Pin
26 "O" Ring
27 Steel Ball
28 Spring
1
Socket Retainer
Spindle Bush
Anvil Shank
1
1
1
Driver Cam
29 Inlet
1
Hammer Dog
Hammer Cage
30 Spring
1
31 "O" Ring
32 Air Regulator
33 Pin
1
10 Hammer Pin
11 Front End Plate
12 Oil Seal
1
1
34 Trigger
1
13 Ball Bearing
14 Rotor
35 Pin
1
36 Reverse Lever
37 "O" Ring
38 Reverse Valve
39 Screw
1
15 Rotor Blade
16 Cylinder
2
1
17 Dower Pin
18 Rotor End
19 Screw
1
40 Pin
1
41 Spring
1
20 Motor Gasket
21 Housing Cap
22 Washer
42 Deflector
43 Rubber Nose Guard
44 Rubber Cover
1
1
1
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS
MANUAL AS A REFERENCETOOL ONLY. NEITHERTHE MANUFACTURER NOR 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 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 PARTSTHERETO.
NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
SKU 93296
For technical questions, please call 1-800-444-3353
Page 7
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Assembly Drawing
SKU 93296
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Page 8
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