Harbor Freight Tools 92421 User's Manual
Contents
1. 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 nonconductive clothes and nonskid footwear are recommended when working Wear restrictive hair covering to contain long hair SKU 92421 For technical questions please call 1 800 444 3353 Page 2 10 11 12 13 14 15 16 17 18 19 Use eye and ear protection Always wear ANSI approved impact safety goggles Wear a full face shield if you are producing metal filings or wood chips Wear an ANSI approved dust mask or2. 10B Connect the 1 2 or more 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 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 SKU 92421 For technical questions please call 1 800 444 3353 Page 4 Assembly Place the Handle 45 onto the side of the Hammer Case 43 and secure it with four Screws 46 and Washers 46A See FIGURE 1 FIGURE 1 Securing with Screws 46 and Washers 46A Hex Wrench not included Operation 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 per manent injury See FIGURE 3 below FIGURE 2 Trigger 13 Anvil 38 Screw 46 and Washer 46A Side Handle 45 FIGURE 3 Proper way to hold the Impact Wrench SKU 92421 For technical questions please call 1 800 444 3353 Page 5 Operation continued Refer to FIGURES 2 and 3 on page 5 and the Assembly Drawing on page 9 Note Turn off your air compressor and disconnect the air hose when you are changing sockets After you attach
3. CENTRAL PNEUMATIC ll EARTHQUAKE 1 EARTHQUAKE IMPACT WRENCH Model 92421 ASSEMBLY and OPERATING INSTRUCTIONS amp 3491 Mission Oaks Blvd Camarillo CA 93011 Visit our Web site at http www harborfreight com TO PREVENT SERIOUS INJURY READ AND UNDERSTAND ALL WARNINGS AND INSTRUCTIONS BEFORE USE 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 Specifications Maximum Torque 1800 Ft Lbs Drive Size its Air Inlet 1 2 14 NPT Recommended Air Pressure 90 PSI Average Air Consumption 8 CFM Tool Weight 24 6 Lbs Impact Mechanism Twin Hammer 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
4. respirator when working around metal wood and chemical dusts and mists 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 Disconnect air supply Disconnect air hose when not in use Remove adjusting keys and wrenches Check that keys and adjusting wrenches are removed from the tool or machine work surface before plugging it in Avoid unintentional starting Be sure the switch is in the Off position 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 Stay alert Watch what you are doing use common sense Do not operate any tool when you are tired 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
5. TRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACE MENTS 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 ARIS ING 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 SKU 92421 For technical questions please call 1 800 444 3353 Page 8 Assembly Drawing SKU 92421 For technical questions please call 1 800 444 3353 Page 9
6. ase call 1 800 444 3353 Page 7 Part No Parts List Description lt Description lt Trigger Handle Cylinder Throttle Valve Bushing Pin Throttle Valve Seat Pin Throttle Valve Plunger Front End Plate Throttle Valve Front End Bearing Throttle Valve Spring End Plate Gasket O ring Motor Housing Air Inlet Bearing Rubber Cap Hammer Pin Trigger Pin Hammer Frame Trigger Hammer Pin Anvil F R Valve Bushing Thrust Washer O ring Hammer Case Bushing Forward Reverse Valve Hammer Case Gasket Steel Ball Hammer Case Spring Hammer Case Cp Scr Pin Washer Washer Handle Screw Screw Handle Gasket Washer Rear Motor Bearing Hammer Case Seal Rear End Plate Socket Retainer 0 ring Rotor Blade Socket Retainer A A LA A Sl L MlM N Ml N MI IMI MI st tls ct st Rotor 0 A N O 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 DISTRIBU TOR 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 DIS
7. e Impact Wrench SKU 92421 For technical questions please call 1 800 444 3353 Page 6 Operation continued Loosening Note Set the Forward Reverse Valve 17 so that the anvil turns counterclockwise reverse 12 Place the socket not included over the nut you wish to loosen 13 Grip the Impact Wrench firmly with two hands and gently squeeze the Trigger 13 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 13 Turn off the air compressor and disconnect the hose 15 If needed remove the nut from the socket Maintenance f Make sure your Impact Wrench is disconnected from the air hose before attempting any maintenance 2 Wipe the Impact Wrench down with a lint free cloth after each use Make sure the Anvil 38 is clear of dirt or debris If possible spray it with compressed air before each use 4 If you do not use an inline oiler filter system lubricate the tool daily by holding it so that the Air Inlet 10B is facing up Squeeze the Trigger 13 and place one or two drops of oil into the Air Inlet 10B Squeezing the Trigger 13 allows the oil to circulate in the motor 5 Repairs to this tool should be performed only by a qualified technician SKU 92421 For technical questions ple
8. e 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 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 that the tool is intact and undamaged 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 Air Connection i Air Hose Line i Impact AIR oe Fae OT COMPRESSOR Air Hose A on Reel Regulator Recommended Air Line Components 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 For optimal performance use an air compressor of 15 Horsepower or more and limit the total air line length to 30 or less 1 You will need to prepare a 1 2 air connector not included to connect to the Air Inlet 10B on the Impact Wrench First wrap the 1 2 air connector with pipe thread seal tape before threading it into the Air Inlet
9. the socket attach the air hose and turn the air compressor on f Select the appropriate size 1 drive socket for your needs 2 Push and snap the socket not included onto the Anvil 38 3 To operate the Forward Reverse Valve 17 follow the directions in FIGURE 4 below FIGURE 4 P The Forward Reverse Valve 17 has three forward and three reverse speeds Turn the Valve to the right toward the clockwise arrow to tighten and to the left toward the counterclockwise arrow to loosen Reverse Handle Shown without protective coating for clarity Tightening Note Set the Forward Reverse Valve 17 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 the Trigger 13 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 work piece 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 13 Turn off the air compressor and disconnect the hose 11 Always check the recommended torque specification for the nut Use a torque wrench to tighten the nut to the proper setting after using th
10. use the tool if any switch does not turn On and Off properly Guard against electric shock Prevent body contact with grounded surfaces such as pipes radiators ranges and refrigerator enclosures 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 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 Impact Wrench 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 Maintenance For your safety maintenance should be performed regularly by a qualified technician SKU 92421 For technical questions please call 1 800 444 3353 Page 3 20 Compressed air only Never use combustible gas as a power source 21 This Impact Wrench should only be used with impact rated sockets and extensions Using any other accessories can cause the accessories to break causing permanent damag
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