Harbor Freight Tools Impact Driver 02623 User Manual

®
1/2” AIR IMPACT  
WRENCH  
Model 02623  
ASSEMBLY and OPERATING  
INSTRUCTIONS  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Copyrightc 2002 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  
 
8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or  
across running machines or air hoses.  
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 (#8) is not depressed when not in  
use and before attaching to the air hose. Do not carry the Impact Wrench with the  
Trigger (#8) depressed.  
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 Trigger (#8) does not engage and disengage  
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 on prescriptions to determine if your judgment or reflexes are impaired while  
taking drugs. If there is any doubt, do not operate the tool.  
18. Use proper size and type extension cord. If an extension cord is required for the air  
compressor, it must be of the proper size and type to supply the correct current to the  
tool without heating up. Otherwise, the extension cord could melt and catch fire, or  
cause electrical damage to the tool. Check your 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 gases as a power source.  
21. Continual exposure to sound levels above 85 decibles could cause hearing damage.  
Hearing protection is advised with this tool.  
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.  
Page 3  
SKU 02623  
 
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.  
Unpacking  
When unpacking, check to make sure the parts listed on page 6 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  
1/4” - 18 NPT  
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 (sold separately) to connect to the Air  
Inlet (#1). First, wrap the 1/4” air connector (not included) with pipe thread seal tape before  
connecting to a Air Source Hose (not included).  
2. Attach air hose to the Air Inlet (#1) on 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.  
3. Set the air pressure on your compressor to 90 PSI. Do not exceed the maximum air  
pressure of 90 PSI.  
4. Check the air connection for leaks.  
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.  
Page 4  
SKU 02623  
 
Operation (continued)  
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.  
5. Select the appropriate size 1/2” socket for your needs.  
6. Push and snap the socket (not included) onto the Anvil (#43).  
Tightening  
Note: Push Forward/Reverse Valve #9 to the left for clockwise rotation, push to the right for  
counterclockwise rotation. This is a sliding valve that is combined with Air Regulator lever  
(#13).  
8. Tighten the nut as tight as you can by hand.  
9. Place the socket (not included) over the nut you wish to tighten.  
10. Grip the Impact Wrench firmly with two hands and gently squeeze the Trigger (#8).  
Note: Fine tune the air flow with the Air Regulator (#13) knob by adjusting it from positions  
1 through 6. One allows the lowest amount of air flow, and six the highest.  
Note: If the Impact Wrench cannot tighten the nut to your satisfaction, do not raise the air  
pressure on the compressor over 90 PSI. Air pressure above 90 PSI will strip the workpiece  
and damage the tool. Use other appropriate methods and tools to tighten the nut.  
11. When the nut is tightened, release the Trigger (#8). Turn off the air compressor and  
disconnect the hose.  
12. 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: Push Forward/Reverse Valve (#9) to the right for counterclockwise rotation.  
13. Place the socket (not included) over the nut you wish to loosen.  
14. Grip the Impact Wrench firmly with two hands and gently squeeze the Trigger (#8).  
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.  
15. When the nut is loosened, release the Trigger (#8). Turn off the air compressor and  
disconnect the hose.  
16. 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. If you are not using an automatic oiler system, put a few drops of pneumatic tool oil through  
the air line before and after each use. During use, add a few drops every hour.  
3. Apply a few drops of oil to the Throttle Valve Pin (#6) before each use.  
4. Wipe the Impact Wrench down with a lint free cloth after each use.  
5. Make sure the Anvil (#43) is clear of dirt or debris. If possible, spray it with compressed air  
before each use.  
Page 5  
SKU 02623  
 
Parts List  
Part No.  
1
2
4a  
5a  
6
7
8
9
11  
12  
13  
14  
15  
16  
17  
20a  
22  
23  
24  
25  
26  
Description  
Air Inlet  
Qty. Part No.  
Description  
Cylinder Dowel  
Rotor Blade  
Front End Plate  
Rear End Plate  
End Plate Gasket  
Motor Clamp Washer  
Hammer Frame  
Hammer Pin  
Qty.  
1
6
1
1
1
2
1
2
2
1
1
1
1
4
1
1
1
1
1
1
1
1
1
27  
29  
30  
31  
32  
33  
34  
35  
37  
38  
38a  
39  
40  
41  
43  
44  
45  
48  
49  
Throttle Valve Spring  
Throttle Valve Assy.  
Throttle Valve Seat  
Throttle Valve Pin  
Exhaust Deflector  
Trigger  
Forward/Reverse Valve 1  
0-ring  
2
1
1
1
1
1
1
1
1
1
1
1
1
Hammer  
Motor Housing Assy.  
Air Regulator  
Air Regulator Screw  
Steel Ball  
Steel Ball Spring  
Grease Fitting  
0-ring  
Hammer Case  
Hammer Case Pilot  
Hammer Case Gasket  
Hammer Case Bushing  
Hammer Case Cap Screw  
Anvil  
Socket Retainer  
Retainer 0-ring  
Cap  
Rotor  
1
1
1
Rear Rotor Bearing  
Front Rotor Bearing  
R. Rotor Bearing Ret.  
Cylinder  
Screw  
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.  
Page 6  
REV 08/03  
SKU 02623  
 
Assembly Drawing  
Page 7  
SKU 02623  
 

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