Harbor Freight Tools Impact Driver 93566 User Manual

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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