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Craftsman 320.27990 Operator's Manual

8a impact wrench
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Operator's
Manual
I I:RAFTSMAN°I
8A Impact Wrench
Model No. 320.27990
WARNING:To
reduce the risk of
injury, the user must read and
understand
the Operator's
manual
before using this product.
!-_
C_US
• WARRANTY
• SAFETY
• UNPACKING
• DESCRIPTION
• OPERATION
• MAINTENANCE
• TROUBLESHOOTING
• ESPANOL
Sears Brands Management
Corporation,
Hoffman
Estates,
IL 60179
U.S.A.
www.craftsman.com

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  Summary of Contents for Craftsman 320.27990

  • Page 1 • UNPACKING injury, the user must read and • DESCRIPTION understand the Operator's manual • OPERATION before using this product. • MAINTENANCE • TROUBLESHOOTING • ESPANOL Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A. www.craftsman.com...
  • Page 2 View and Part List page 17-20 Sears Repair Parts Phone Number Back Cover CRAFTSMAN ONE YEAR LIMITED WARRANTY FOR ONE YEAR from the date of purchase, this product is warranted against any defects in material or workmanship. With proof of purchase, defective product will be replaced free of charge.
  • Page 3 The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols and the explanations with them deserve your careful attention and understanding. The warnings do not, by themselves, eliminate danger. The instructions and warnings they give are no substitutes for proper accident prevention...
  • Page 4 Some of these following symbols may be used on this tool. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the tool better and more safely. SYMBOL NAME DESIGNATION/EXPLANATION Volts Voltage Amperes Current Hertz Frequency...
  • Page 5: General Safety Precautions

    A_, WARNING: Be sure to read and understand all instructions in this manual before using the Impact Wrench. Failure to follow all instructions listed below may result in electric shock, fire, and/or serious personal injury. WARNING: Do not attempt to operate this tool until you have thoroughly read all instructions, safety rules, and warnings.
  • Page 6: Personal Safety

    • When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock. • If operating a power tool in a damp location is unavoidable, use a ground fault circuit interrupter (GFCI) protected...
  • Page 7: Service Safety

    • Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users. Maintain power tools.
  • Page 8 SPECIFIC SAFETY RULES FOR IMPACT WRENCH Hold power tools by the insulated gripping surfaces when performing an operation where the cutting tool may contact hidden wiring or its own cord. Contact with a "live" wire will make exposed metal parts of the tool live and shock the operator.
  • Page 9 If any of the items mentioned is missing, return the Impact Wrench with your sales receipt to your nearest Craftsman retail outled to have the Impact Wrench replaced. WARNING: If any part is broken or missing, do not attempt...
  • Page 10: Know Your Impact Wrench

    I D] _]_II]_IIIEe]_] KNOW YOUR IMPACT WRENCH (Fig.l) The machine is intended for driving and loosening screws and bolts as well as for tightening and loosening nuts within the range of the Product Specifications. Fig. 1 1/2-in. Square Externally Drive Accessible Carbon Brushes Forward/...
  • Page 11: Led Work Light

    WARNING: The safe use of this product requires an understanding of the information on the tool and in this operator's manual, as well as knowledge the project you are attempting. Before use of this product, familiarize yourself with all operating features and safety rules.
  • Page 12 SELECTING THE CORRECT SOCKET (SOCKETS AVAILABLE SEPARATELY) CAUTION: Always verify that the tool is switched off and unplugged before installing any accessories on the tool. Always use the correct size socket for bolts and nuts. An incorrect socket will result in inaccurate and inconsistent fastening torque and/or damage to the bolt...
  • Page 13 INSTALLING FASTENERS NOTE: Always keep the Impact Wrench at a right angle to the fastener to avoid damaging the fastener head. To fasten: Start threading the fastener by hand onto or into its threaded counterpart (e.g. nut onto bolt, or bolt into nut or threaded hole). With the proper impact socket securely mounted to the wrench, slide the...
  • Page 14 After fastening, always check the torque with a torque wrench. The fastening torque is affected by a wide variety of factors, including the following: • Voltage o A voltage reduction will cause a reduction in the fastening torque. • Socket o Failure to use the correct size socket will cause a reduction in the fastening...
  • Page 15: Brush Replacement

    _1, WARNING: When servicing, use only identical Craftsman replacement parts. Use of any other parts may create a hazard or cause product damage. A_, WARNING: It is not recommended...
  • Page 16 PROBLEM CAUSE SOLUTION The Impact Wrench Plug the wrench into The Impact Wrench not plugged into a power an appropriate power does not work source source Socket cannot installed Improper socket selection Use a suitable socket Clean and clear vents. Cooling vents are Motor overheating obstructed...
  • Page 17 .I..o _° _.z_...
  • Page 18: Impact Wrench

    8A IMPACT WRENCH MODEL NUMBER 320.27990 The Model Number will be found on the Nameplate. Always mention the Model Number when ordering parts for this tool. 5610100000 Tapping Screw 3125492000 Decorate Cover 3421138000 Front Gear Housing 5690208000 O Ring 5650351000 Washer 2822873000 Spindle...
  • Page 19 3123738000 Bearing Holder 3125486000 Fan Baffle 5610048000 Tapping Screw 5650007000 Spring Washer 5650005000 Plain Washer 2740283000 Stator 3321078000 Hosuing 4930041000 Receptacle 4930008000 Sleeve 5620017000 Hexagon Socket Screw 4930057000 Terminal 3321080000 Rear Cover 5610042000 Tapping Screw 3121028000 Cord Guard 3125935000 Brush Cover 2800005000 Brush Holder Assy 4960019000...
  • Page 20 4870453000 Rocker Switch 3321079000 Handle 4810002000 Power Cord & Plug 4860004000 Inner Wire 4930449000 Terminal 4930030000 Receptacle 27990 ManuaLRevised_lO 1202 Page 20...
  • Page 21 I_[e]li_l 27990 ManuaLRevised_lO 1202 Page 21...
  • Page 22 I_[e]li_l 27990 ManuaLRevised_lO 1202 Page 22...
  • Page 23 I_[e]li_l 27990 ManuaLRevised_lO 1202 Page 23...
  • Page 24 Your Home For troubleshooting, product manuals and expert advice: managemylife www.managemylife.com For repair - in your home - of all major brand appliances, lawn and garden equipment, or heating and cooling systems, no matter who made it, no matter who sold it! For the replacement parts, accessories and owner's manuals that you need to do-it-yourself.