CHICAGO 31877 Set Up And Operating Instructions Manual

1/2" electric impact wrench

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½" ELECTRIC IMPACT WRENCH

SET uP ANd OPERATINg INSTRuCTIONS

Diagrams within this manual may not be drawn proportionally.

Due to continuing improvements, actual product may differ slightly from the product described herein.

distributed exclusively by Harbor Freight Tools

Visit our website at: http://www.harborfreight.com

Read this material before using this product.

Failure to do so can result in serious injury.

SAVE THIS MANuAL.

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 or replacement parts, please call 1-800-444-3353.

Model

3491 Mission Oaks Blvd., Camarillo, CA 93011

1997 by Harbor Freight Tools

Manual Revised 07i

31877

Table of Contents

Summary of Contents for CHICAGO 31877

Page 1 ½” ELECTRIC IMPACT WRENCH Model 31877 SET uP ANd OPERATINg INSTRuCTIONS Diagrams within this manual may not be drawn proportionally. Due to continuing improvements, actual product may differ slightly from the product described herein. ® distributed exclusively by Harbor Freight Tools 3491 Mission Oaks Blvd., Camarillo, CA 93011...
Page 2: Important Safety Information
NOTICE is used to address practices not related Notice Notice to personal injury. CAuTION, without the safety alert symbol, CAuTION CAuTION is used to address practices not related to personal injury. SKU 31877 For technical questions, please call 1-800-444-3353. Page ...
Page 3: General Safety Rules
The handles must be kept clean, dry, and free from oil and grease at all times. DISCONNECT POWER. Unplug when not in use, before servicing, and when changing accessories. SKU 31877 For technical questions, please call 1-800-444-3353. Page 3...
Page 4 [to the State of California] to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are: Lead from lead-based paints Crystalline silica from bricks and cement or other masonry products SKU 31877 For technical questions, please call 1-800-444-3353. Page 4...
Page 5: Double Insulated Tools: Tools With Two Prong Plugs
As the distance from the supply outlet increases, you must use a heavier gauge exten- sion cord. Using extension cords with inadequately sized wire causes a serious drop in voltage, resulting in loss of power and possible tool damage. (See Table A.) SKU 31877 For technical questions, please call 1-800-444-3353. Page ...
Page 6 * Based on limiting the line voltage drop to five volts at 150% of the rated amperes. Symbology Double Insulated Volts Alternating Current Canadian Standards Association Amperes No Load Revolutions per Minute n 0 xxxx/min. Underwriters Laboratories, Inc. (RPM) SKU 31877 For technical questions, please call 1-800-444-3353. Page ...
Page 7: Specifications
Spray silicon or another appropriate lubricant on the fastener and allow it to sit for 1-30 minutes. Rapidly press the ROCKER SWITCH () up and then down. This will cause the ANVIL (1) change direction rapidly and loosen the bolt. SKU 31877 For technical questions, please call 1-800-444-3353. Page 7...
Page 8: Maintenance
Liberally apply a high temperature grease (standard automotive wheel grease is suf- ficient). to the THRUST WASHER (14), the back of the ANVIL (16), IMPACTOR (19), SPRING (21), and GEARS (22 & #27). Replace the ANVIL and GEAR CASE. SKU 31877 For technical questions, please call 1-800-444-3353. Page 8...
Page 9: Parts List
14. When assembling, make sure bevel side is towards the ears of the anvil. 16. Includes 17 & 18. 7. Includes . 9. Includes 4. 3. Convex side towards cable. 38. Torque from 22 to 27 in-lb. 39. Fits on bearing O.D. SKU 31877 For technical questions, please call 1-800-444-3353. Page 9...
Page 10: Assembly Diagram
Note: If product has no serial number, record month and year of purchase instead. Note: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts. SKU 31877 For technical questions, please call 1-800-444-3353. Page 10...
Page 11: Limited 90-Day Warranty
This warranty gives you specific legal rights and you may also have other rights which vary from state to state. 3491 Mission oaks Blvd. • Po Box 6009 • camarillo, cA 93011 • (800) 444-3353 SKU 31877 For technical questions, please call 1-800-444-3353. Page 11...