Operator's Manual I I:RAFTSMAN°I 8A Impact Wrench Model No. 320.27990 !-_ C_US • WARRANTY • SAFETY WARNING:To reduce the risk of injury, the user must read and understand the Operator's manual before using this product. • UNPACKING • DESCRIPTION • OPERATION • MAINTENANCE • TROUBLESHOOTING • ESPANOL Sears Brands Management www.craftsman.com Corporation, Hoffman Estates, IL 60179 U.S.A.
iII_ =[e_[_e__] Warranty page 2 Safety Symbols page 3 Safety Instructions page 5-8 Unpacking page 9 Description page 10-11 Operation page 12-14 Maintenance page 15 Troubleshooting page 16 Exploded page 17-20 View and Part List Sears Repair Parts Phone Number CRAFTSMAN Back Cover ONE YEAR LIMITED WARRANTY FOR ONE YEAR from the date of purchase, this product is warranted against any defects in material or workmanship.
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 any danger. The instructions and warnings they give are no substitutes for proper accident prevention measures.
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 V Volts Voltage A Amperes Current Hz Hertz Frequency W Watt Power rain Minutes Alternating ---== Direct no Class ...
A_, WARNING: Be sure to read and understand all instructions before using the Impact Wrench. Failure to follow all instructions may result in electric shock, fire, and/or serious personal injury. in this manual listed below _, WARNING: Do not attempt to operate this tool until you have thoroughly read all instructions, safety rules, and warnings. Failure to comply with them can result in fire, electric shock, or serious personal injury. Save the manual and refer to it frequently.
• 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 ground fault circuit interrupter (GFCI) protected GFCI reduces the risk of electric shock. is unavoidable, use a power supply. Use of a PERSONAL SAFETY Stay alert, watch what you are doing and use common sense when operating a power tool.
• 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. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool's operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
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. Do not use the power tool with a damaged cord. Do not touch the damaged cord; turn off the tool and pull the plug from the outlet if the cord is damaged while working. Damaged cords increase the risk of an electric shock.
A_, WARNING: Your Impact Wrench should never be connected to the power source when you are assembling parts, making adjustments, installing or removing bits, cleaning, or when it is not in use. Disconnecting the Impact Wrench will prevent accidental starting, which could cause serious personal injury. When unpacking the box, do not discard contents are accounted for. 1. Carefully surface. lift the Impact wrench 2.
ID]_]_II]_IIIEe]_] KNOW YOUR IMPACT The machine for tightening WRENCH (Fig.l) is intended for driving and loosening screws and bolts as well as and loosening nuts within the range of the Product Specifications. Fig. 1 1/2-in. Square Drive Externally Accessible Carbon Brushes Forward/ Reverse Switch Live Tool Indicator LED Work Light _i, WARNING: Do not allow familiarity with the impact wrench to cause a lack of alertness.
_, 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 of the project you are attempting. Before use of this product, familiarize yourself with all operating features and safety rules. LED WORK LIGHT Pressing the trigger the Impact Wrench. switch illuminates the LED worklight located on the base of This feature provides extra light for increased visibility.
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 or nut. INSTALLING AND REMOVING THE SOCKET (Fig. 2) 1. 2. To install the socket, push it onto the output drive of the tool until it locks into place.
INSTALLING FASTENERS NOTE: Always keep the Impact Wrench damaging the fastener head. at a right angle to the fastener to avoid To fasten: 1. Start threading the fastener by hand onto or into its threaded counterpart (e.g. nut onto bolt, or bolt into nut or threaded hole). 2. With the proper impact socket securely mounted impact socket onto the nut or bolt head. 3 Hold the tool securely with both hands and depress the switch at '_j.
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 torque. size socket will cause a reduction in the fastening o A worn socket (wear on the hex end or square end) will cause a reduction in the fastening torque.
_1, WARNING: To avoid serious personal injury, always disconnect the tool plug from the power source before cleaning or performing any maintenance. _1, WARNING: When servicing, use only identical Craftsman replacement Use of any other parts may create a hazard or cause product damage. parts. A_, WARNING: It is not recommended to use compressed dry air as a cleaning method for the Impact Wrench. If cleaning with compressed air must be used, always wear safety goggles or safety glasses with side shields.
PROBLEM CAUSE SOLUTION The Impact Wrench does not work The Impact Wrench is not plugged into a power source Plug the wrench into an appropriate power source Improper Use a suitable socket Socket cannot installed be Cooling vents are obstructed Motor overheating 27990 ManuaLRevised_iO socket selection 1202 Clean and clear vents.
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8A IMPACT WRENCH MODEL NUMBER 320.27990 The Model Number will be found on the Nameplate. Number when ordering parts for this tool.
27990 25 3123738000 26 3125486000 27 5610048000 Tapping Screw 2 28 5650007000 Spring Washer 2 29 5650005000 Plain Washer 2 30 2740283000 Stator 1 31 3321078000 Hosuing 1 32 4930041000 Receptacle 2 33 4930008000 Sleeve 2 34 5620017000 35 4930057000 Terminal 2 36 3321080000 Rear Cover 1 37 5610042000 38 3121028000 Cord Guard 1 39 3125935000 Brush Cover 2 40 2800005000 Brush Holder Assy 2 41 4960019000 Carbon 2 42 4930432000 Connecter 1 43 3700
27990 55 4870453000 Rocker Switch 1 56 3321079000 Handle 1 57 4810002000 58 4860004000 Inner Wire 2 59 4930449000 Terminal 2 60 4930030000 Receptacle 4 ManuaLRevised_lO 1202 Power Cord & Plug 1 Page 20
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