1/2” IMPACT WRENCH
WITH 2” EXTENDED ANVIL
93566
ASSEMBLY & OPERATING INSTRUCTIONS
Due to continuing improvements, actual product may differ slightly from the product described herein.
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
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.
7.
Use eye and ear protection. Always wear ANSI approved impact safety goggles
and hearing protection. Wear a full face shield if you are producing metal filings or
wood chips. Wear an ANSI approved dust mask or respirator when working around
metal, wood, and chemical dusts and mists.
8.
9.
Do not overreach. Keep proper footing and balance at all times. Do not reach over or across
running machines or air hoses.
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 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 Impact Wrench 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, property or bystanders.
SKU 93566
For technical questions please call 1-800-444-3353.
Page 3
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.
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities, contain chemicals known [to the State of 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
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. )
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 1-800-444-3353.
Operation
Impact Wrench
with Extended
Anvil
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
1.
You will need to prepare a / ” air connector (not included) to connect to the Air Inlet (10) on the
4
1
Impact Wrench. First, wrap the / ” air connector with pipe thread seal tape before threading it
4
into the Air Inlet (10). Connect the 1/2” 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 93566
For technical questions please call 1-800-444-3353.
Page 4
Operation (continued)
Warning!! This Impact Wrench supplies powerful torque and is designed to be operated with two
hands. Failure to operate the Impact Wrench with two hands may result in serious injury.
Refer to FIGURES 1 through 3 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 1/2” drive socket (not included) for your needs.
Push and snap the socket onto the Anvil (18).
To operate the Air Regulator (12), follow the directions in FIGURE 2 on page 6.
Note: Set the Forward/Reverse Valve (3) so that the Anvil (18) turns clockwise (forward) - see
FIGURE 3 on page 6.
7.
8.
9.
Tighten the nut as tight as you can by hand.
Place the socket over the nut you wish to tighten.
Grip the Impact Wrench firmly with two hands and gently squeeze the Trigger (4).
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 (4). 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 Forward/ Reverse Valve (3) so that the anvil turns counterclockwise (reverse)- see
Figure 3.
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 (4).
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 (4). Turn off the air compressor and disconnect
the hose.
15.
If needed, remove the nut from the socket.
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 (18) is clear of dirt or debris. If possible, spray it with compressed air
before each use.
SKU 93566
For technical questions please call 1-800-444-3353.
Page 5
Maintenance (Cont’d)
4.
5.
Weekly, or more often if used on a daily basis, use a grease gun (not included), to inject
grease into the Grease Fitting. Put in only a drop or two. See FIGURE 3.
If you do not use an inline oiler/filter system, lubricate the tool daily by holding it so that
the Air Inlet (10) is facing up. Squeeze theTrigger (4), and place one or two drops of oil
into the Air Inlet (10). Squeezing the Trigger (4) allows the oil to circulate in the motor.
Figure 1
Air Inlet (10)
Trigger (4)
Anvil (18)
Air Regulator (12)
Figure 3
Figure 2
2
Forward
Reverse
3
4
The Air Regulator (12) has an index from 1 to 4.
Push and turn the Air Regulator (12) to a higher
number, 3 or 4, for more air flow and more power.
Push and turn it to a lower number, 2 or 1, for
less power.
Grease Fitting
SKU 93566
For technical questions please call 1-800-444-3353.
Page 6
Parts List
Quantity Part #
Part # Description
Description
Quantity
1
2
3
4
5
6
7
8
Housing
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
38-1
39
40
41
42
43
44
Cylinder
Rotor
1
1
6
1
1
1
1
1
1
1
1
4
4
1
1
1
1
2
1
1
1
1
Valve Sleeve
Forward/Reverse Valve
Trigger
Pin
Bushing
Valve Stem
Ball Bearing
Spring
Air Inlet
Screen
Air Regulator
O Ring
Spring
Oil Seat
Screw
Anvil Bushing
Anvil (1/2”)
Hammer Cage
Hammer Pin
Hammer Dog
Drive Cam
Pin Cylinder
Rotor Blade
Front End Plate
Ball Bearing
Rear End Plate
Pin
Spring
Pin
Rear Gasket
Rear Cover
Washer
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Screw
Rubber Sleeve
Exhaust Deflector
Brass Silencer
Screw
Screw
Anvil Collar
O Ring
Rubber
Screw
Note: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL AS A REFERENCE
TOOL ONLY. NEITHER THE 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
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.
SKU 93566
For technical questions please call 1-800-444-3353.
Page 7
Parts/Assembly Diagram
SKU 93566
For technical questions please call 1-800-444-3353.
Page 8
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