Central Pneumatic 93296 User manual

3/8” IMPACT WRENCH
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at http://www.harborfreight.com
Copyright©2005 by Harbor FreightTools®. 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.
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
®
ASSEMBLY AND OPERATING
INSTRUCTIONS
Model 93296
Due to continuing improvements, actual product may differ slightly from the product described herein.

Page 2SKU 93296 For technical questions, please call 1-800-444-3353
Specifications
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 compressors 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.
Donotmodifythistoolanddonotusethistoolforapurposefor 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. Useeyeandearprotection. Always wearANSIapprovedimpactsafetygoggles
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. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines or air hoses.
MaximumTorque 75Ft. Lbs.
Drive Size 3/8”
Air Inlet 1/4” - 18 NPT
Recommended Air Pressure 90 PSI
Free Speed 10,000 RPM
Air Consumption 3 CFM

Page 3SKU 93296 For technical questions, please call 1-800-444-3353
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. Besurethetrigger is releasedwhen not in use and before
plugging in.Do not carry any tool with your finger on the trigger, whether it is plugged in
ornot.
13. Stay alert. Watchwhatyouare doing, use commonsense.Do not operate anytool when
you are tired.
14. Check for damaged parts. Beforeusinganytool,anypartthatappearsdamagedshould
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;andanyotherconditionthatmayaffectproper operation.Anypart thatisdamaged
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.Readwarning 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 ImpactWrench.
18. Use proper size and type extension cord.If an extension cord isrequired, itmust beof
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. Foryoursafety, maintenanceshould be performed regularly byaqualified
technician.
20. Compressed air only. Never use combustible gas as a power source.
21. ThisImpactWrench should only beused with impact sockets andextensions. 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.

Page 4SKU 93296 For technical questions, please call 1-800-444-3353
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 FreightTools at the number on the cover of this manual
as soon as possible.
1. You will need to prepare a 1/4” air connector (not included) to connect to the Air Inlet
(29)on the ImpactWrench. First, wrapthe 1/4”air connector withpipe thread sealtape
beforethreadingit into the Air Inlet (29). Connectthe 3/8” IDAir Source Hoseto aquick
connect coupler (not included), and then to the ImpactWrench.
Note: Ifyouare not using an automaticoiler system,before operation,add afew drops
of Pneumatic Tool Oil to the airline connection. Add a few drops more after each hour
of continual use.
2. Set the air pressure on the regulator to 90 PSI. Do not exceed the recommended air
pressure of 90 PSI.
3. Check the air connection for leaks. Disconnect from the air source.
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.
Impact
Wrench
Warning:The warnings,cautions,and instructions discussed in this instruction manual
cannotcoverallpossible conditionsand situations thatmayoccur.Itmustbe 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.

Page 5SKU 93296 For technical questions, please call 1-800-444-3353
Operation (continued)
Note: Turnoffyouraircompressorand disconnecttheairhose whenyouarechanging sockets.
After you attach the socket, attach the air hose and turn the air compressor on.
4. Select the appropriate size 3/8” drive socket for your needs.
5. Push and snap the socket (not included) onto the Anvil (6).
6. Turn the Air Regulator (32) in the direction indicated by the Harrow on the Regulator to
increase the power. Turn it toward the Larrow to decrease the power.
Note: Set the Reverse Lever (38) to the left, so that the anvil turns clockwise (forward).
7. Tighten the nut as tight as you can by hand.
8. Place the socket (not included) over the nut you wish to tighten.
9. Grip the Impact Wrench firmly with two hands and gently squeeze theTrigger (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 ImpactWrench.
Loosening
Note: Setthe ReverseLever(38) totheright,so thattheanvilturns counterclockwise(reverse).
12. Place the socket (not included) over the nut you wish to loosen.
13. Grip the ImpactWrench firmly with two hands and gently squeeze theTrigger (34).
Note: If the Impact Wrench cannot loosen the nut, do not raise the air pressure on the
compressorover90PSI. Do not attempt to loosenthe nutwith the ImpactWrench.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.
Refer to the illustration on page 6, and the Assembly Drawing on page 8.

Page 6SKU 93296 For technical questions, please call 1-800-444-3353
Maintenance
1. MakesureyourImpactWrench is disconnected fromthe air hose beforeattempting any
maintenance.
2. Wipe the Impact Wrench down with a lint free cloth after each use.
3. Makesure the Anvil(6) is clearofdirtor debris. Ifpossible,sprayitwith compressed air
before each use.
4. Periodically, add a high quality machine oil to the oil inlet by removing the Oil Screw
(39). See illustration, below.
5. If you do not use an inline oiler/filter system, lubricate the tool daily by holding it so that
theAirInlet(29)is facingup. SqueezetheTrigger (34), and place one ortwodropsofoil
into the Air Inlet (29). Squeezing theTrigger (34) allows the oil to circulate in the motor.
AirRegulator(32)
Trigger(34)
Anvil (6)
Air Inlet (29)
OilScrew
(39)

Page 7SKU 93296 For technical questions, please call 1-800-444-3353
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
MANUALASAREFERENCETOOLONLY. NEITHERTHE MANUFACTURERNORDISTRIBUTOR
MAKES ANY REPRESENTATION OR WARRANTY 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/ORDISTRIBUTOR EXPRESSLYSTATESTHATALLREPAIRSANDPARTSREPLACEMENTS
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
OUTOF HIS OR HER INSTALLATION OFREPLACEMENTPARTSTHERETO.
Parts List
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Page 8SKU 93296 For technical questions, please call 1-800-444-3353
Assembly Drawing