Central Pneumatic 2623 User manual

1/2” AIR IMPACT
WRENCH
ASSEMBLY and OPERATING
INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit ourWeb site at http://www.harborfreight.com
For technical questions and replacement parts,please call 1-800-444-3353
Model 02623
®
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.
®

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Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice with this
manual. Write the invoice number on the inside of the front cover. Keep the manual and
invoice in a safe and dry place for future reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be followed to
reduce the risk of personal injury and damage to equipment.
Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use machines or power tools in damp or wet
locations. Don’t expose to rain. Keep work area well lighted. Do not use electrically
powered tools in the presence of flammable gases or liquids.
3. Keep children away. Children must never be allowed in the work area. Do not let
them handle machines, tools, extension cords, or air hoses.
4. Store idle equipment. When not in use, tools must be stored in a dry location to
inhibit rust. Always lock up tools and keep out of reach of children.
5. Use the right tool for the job. Do not attempt to force a small tool or attachment to
do the work of a larger industrial tool. There are certain applications for which this
tool was designed. It will do the job better and more safely at the rate for which it was
intended. Do not modify this tool and do not use this tool for a purpose for which it
was not intended .
6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in
moving parts. Protective, electrically non-conductive clothes and non-skid footwear
are recommended when working. Wear restrictive hair covering to contain long hair.
7. Use eye and ear protection. Always wear ANSI approved impact safety goggles and
ear 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.
Drive Size 1/2”
Maximum RPM’s Forward 6600 RPM’s @90 PSI
Maximum RPM’s Reverse 6800 RPM’s @90 PSI
Maximum Torque 625 FT./LBS.
Average Air Consumption 4.7 CFM at 90 PSI
Air Inlet 1/4” - 18 NPT
Maximum Air Pressure 90 PSI
Blows Per Minute 1200 BPM
Maximum Bolt Capacity 5/8”
Weight 6.6 Lbs.
Specifications

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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.

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Operation
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.
Impact
Wrench
1/4” - 18 NPT
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.
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.
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.

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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 ImpactWrench. 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.

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NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
PLEASE READTHE FOLLOWING CAREFULLY
THEMANUFACTURERAND/OR DISTRIBUTORHAS PROVIDEDTHEPARTSDIAGRAMINTHIS
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-
TORMAKES ANYREPRESENTATION ORWARRANTYOFANY KINDTOTHEBUYERTHATHE
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/ORDISTRIBUTOREXPRESSLY STATESTHATALLREPAIRS AND PARTSREPLACEMENTS
SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSEDTECHNICIANS AND NOT BYTHE
BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER
REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTSTHERETO, OR ARISING
OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTSTHERETO.
Parts List
Part No. Description Qty. Part No. Description Qty.
1 Air Inlet 1 27 Cylinder Dowel 1
2 Throttle Valve Spring 1 29 Rotor Blade 6
4a Throttle Valve Assy. 1 30 Front End Plate 1
5a Throttle Valve Seat 1 31 Rear End Plate 1
6 Throttle Valve Pin 1 32 End Plate Gasket 1
7 Exhaust Deflector 1 33 Motor Clamp Washer 2
8 Trigger 1 34 Hammer Frame 1
9 Forward/Reverse Valve 1 35 Hammer Pin 2
11 0-ring 2 37 Hammer 2
12 Motor Housing Assy. 1 38 Hammer Case 1
13 Air Regulator 1 38a Hammer Case Pilot 1
14 Air Regulator Screw 1 39 Hammer Case Gasket 1
15 Steel Ball 1 40 Hammer Case Bushing 1
16 Steel Ball Spring 1 41 Hammer Case Cap Screw 4
17 Grease Fitting 1 43 Anvil 1
20a 0-ring 1 44 Socket Retainer 1
22 Rotor 1 45 Retainer 0-ring 1
23 Rear Rotor Bearing 1 48 Cap 1
24 Front Rotor Bearing 1 49 Screw 1
25 R. Rotor Bearing Ret. 1
26 Cylinder 1
REV 08/03

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Assembly Drawing