Harbor Freight Tools 37730 User's Manual
Contents
1. 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 37730 Page 7 Assembly Drawing N SKU 37730 Page 82. 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 fol lowed 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 lit 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 or extension cords 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 SKU 37730 Page 2 10 11 12 13 14 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 Dress properly while
3. working 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 Use eye face 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 or respirator when working around metal wood and chemical dusts and mists Wear ANSI approved ear plugs Do not overreach Keep proper footing and balance at all times Do not reach over or across running machines Maintain tools with care Keep tools clean and in good condition for better and safer performance Follow instructions for lubricating and changing accessories Inspect tool fittings and 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 power Disconnect from air pressure source 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 connecting it Avoid unintentional starting Be sure the Butterfly Throttle Switch is in the neutral OFF position when not in use and before attaching to pressure source Do not carry any tool with your finger on the Butterfly Throttle Switch whether it is atta
4. CENTRAL PNEUMATIC n V ES a a 3 8 Butterfly Air Impact Wrench Mfeye 1137730 ASSEMBLY AND OPERATING INSTRUCTIONS 3491 Mission Oaks Blvd Camarillo CA 93011 Visit our Web site at http www harborfreight com Copyright 2004 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 paris please call 1 800 444 3353 Specifications r Polished Aluminum and i Operating Speed 10 000 max rpm 90 psi Operation Speed 1600 Impacts per Minute Air Inlet Size 1 4 npt Net Weight 2 0 Ibs Average Air This compact Impact Wrench allows you to get at fasteners in much tighter spots than conventional pistol designed air impact wrenches It delivers a powerful 50ft lbs of torque at 90 PSI at up to 1580 impacts per minute It uses standard 1 4 npt air connections and a convenient 3 8 drive The Butterfly switch on top of the tool allows you to quickly and easily change impact direction The built in regulator allows you to instantly change air pressure and torque among 8 settings Sturdily built with a polished aluminum body and machined steel components it is a versatile tool you will be proud to have in your tool box Save This Manual You will need the manual for the safety warnings and precautions assembly instructions
5. D You may control the amount of torque to be applied by rotating the Regulator 38 See photo next page There are REVERSE FORWARD settings from 1 through 8 indicating Throttle Lever Butterfly 5 increasing torque Rock the Throttle dg Lever Butterfly 5 to the left to REVERSE the direction of the tool NOTE In this booklet FORWARD refers to clockwise rotation and REVERSE refers to counterclockwise rotation of the Anvil 9 Always be aware of the direction of the threading of the fastener you are working on While most fasteners install with clockwise rotation some threads are intentionally the reverse SKU 37730 Page 5 NOTE The actual torque delivered at each of the eight settings will depend on the air pressure supplied to the tool We suggest that you test the actual torque by tightening a nut or bolt at each setting then observing the resultant torque by using a mechanical torque wrench not supplied 7 If installing a nut or bolt set it as tight as possible by hand before tightening with the Air Impact Wrench 8 Place the socket not included over the fastener 9 Grip the Air Impact Wrench tightly with both hands via and rock the Throttle Lever Butterfly 5 to the Regulator 38 right The tool will operate and tighten the fastener 10 When the fastener is tightened release the Throttle Lever Butterfly 5 and remove the tool from the fastener 11 If pos
6. ading it into the Air Inlet 36 Tighten securely 2 Attach a standard quick connector not included to your 3 8 air pressure source hose Then attach the air hose to the Air Impact Wrench NOTE If you are not using an automatic in line oiler add a few drops of pneumatic oil to the Air Inlet 86 before attaching the air hose Add a few more drops of oil after every hour of continual use 3 Setthe air pressure regulator on your air compressor at 90 psi WARNING Do not exceed the recommended pressure of 90 psi Damage to your tool and possible personal injury and or property damage may result 4 Check the air line and its connections for air leaks Make note of these and repair them before using this tool NOTE Turn off your air compressor and disconnect the air pressure hose before changing sockets or making any adjustments to this tool Severe injury or property damage may otherwise result WARNING This tool generates considerable torque when in use Always hold the tool with both hands when using and brace yourself to resist the torque which will be delivered to the work piece 5 Select the appropriate size 3 8 square drive impact socket not included for your needs Push and snap the socket onto the Anvil 9 6 Setthe direction of the Air Impact Wrench to FORWARD or REVERSE Please see photo By moving the Throttle Lever Butterfly 5 to the right you are setting the tool to operate FORWAR
7. ched 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 use the tool if the Butterfly Throttle Switch does not function properly SKU 37730 Page 3 15 16 17 18 19 20 Guard against electric shock when working on electrical equipment such as your air compressor 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 on prescriptions to determine if your judgment or reflexes are impaired while taking drugs If there is any doubt do not operate the tool Use proper size and type air pressure line and fittings The recommended air line for this tool is 3 8 deli
8. sible check the actual torque applied to the fastener with a mechanical torque wrench not supplied 12 If removing a fastener grip the Air Impact Wrench tightly with both hands and rock the Throttle Lever Butterfly 5 to the left The tool will operate and loosen the fastener assuming that the fastener is a standard right hand thread NOTE Always check to be sure of the thread direction of any fastener before attempting to install or remove it If the fastener is a left hand thread rock the Throttle Lever Butterfly 5 to the right for removal WARNING If the fastener will not come off first check to be sure of the direction of the thread If you have the thread direction correct and the fas tener will not come off DO NOT INCREASE THE AIR PRESSURE to the tool beyond 90 psi This may damage the tool You may have to use penetrating oil heat or a mechanical wrench to remove the fastener 13 When you are done using this tool turn off the air compressor and disconnect the air hose Put the Air Impact Wrench away in its proper storage place Maintenance 1 Your Air Impact Wrench should be kept clean and dry 2 When notin use store your tool in a suitable place where it will not be exposed to water corrosive materials or undue banging around 3 Ifyou are not using an in line oiler you should inject a few drops of pneumatic oil into the air inlet of the tool and the Oiler Screw 3 port after every hour of contin
9. uous use 4 If your tool loses power or you notice air leaks take it to a certified technician for service 5 All repairs to this tool should be performed by a qualified service technician SKU 37730 Page 6 Parts List Description are Rubber Nose Guard Rear End Plate Ball Bearing Motor Housing Oiler Screw Throttle Pin Throttle Lever Anvil Bushing 7 O Ring Socket Retaining Ring Anvil 10 1 Valve Spring Hammer Cage 1 em a 6 7 EA e EA Ea 3 4 5 6 7 ie EE ES a a Hammer Cam i 13 14 O Ring 15 16 Oil Seal 17 18 19 Cylinder 20 21 Hammer Pin Fixing Ring Ball Bearing t Front End Plate Motor Pin 2 Rotor y 22 1 23 1 24 1 25 1 26 27 28 29 30 31 32 33 34 1 35 1 36 1 37 1 38 1 39 1 40 41 1 2 1 4 Rotor Blade 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
10. vering no more than 90 psi Recommended air inlet size is 1 4 18 npt Maintenance For your safety service and maintenance should be performed regularly by a qualified technician You should maintain a proper regulator and moisture trap in your air line at all times Note Performance of this tool may vary depending on variations in local air pressure Warning The warnings cautions and instructions discussed in this instruc tion manual cannot cover all possible conditions and situations that may oc cur 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 WARNING The brass components of this product contain lead a chemical known to the State of California to cause birth defects or other reproductive harm California Health amp Safety code 25249 5 et seq Unpacking When unpacking Examine the conditiojn of your impact wrench If any parts are missing or broken please call Harbor Freight Tools at the number on the cover of this manual Air Impact Fi Wrench 7 7 amp Air Hose Line Vaive Oiler 37 Filter AIR 1 COMPRESSOR Air Hose on Reel Regulator Recommended Air Line Components SKU 37730 Page 4 Operation 1 Install a standard 1 4 Air Connector not included to the Air Inlet 36 First wrap the threaded portion of the 1 4 air connector with pipe thread seal tape before thre
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