Harbor Freight Tools 91715 User Manual
1
®
/2” IMPACT WRENCH
(MAGNESIUM, 2 HAMMER)
Model 91715
ASSEMBLY AND OPERATING
INSTRUCTIONS
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© 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 parts, please call 1-800-444-3353.
REV 09/04
Specifications
Torque Range 50-500 Ft. Lbs.
Drive Size 1/2”
Air Inlet 1/4” - 18 NPT
Recommended Air Pressure 90 PSI
RPM 7,500
Average Air Consumption 4 CFM
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. 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. 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.
REV 05/05
Page 2SKU 91715 For technical questions, 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 is released 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.
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 par t 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 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 accessor ies are available from Harbor Freight
Tools.
17. 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 Wrench.
18. 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.
19. Maintenance. For your safety, maintenance should be performed regularly by a
qualified technician.
20. Compressed air only. Never use combustible gas as a power source.
21. This Impact Wrench should only be used with impact sockets and extensions.
Using any other accessories can cause the accessories to break, causing permanent
damage to the unit and severe injury to the operator.
Page 3SKU 91715 For technical questions, please call 1-800-444-3353
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