Craftsman 320.66810 Operator's Manual

20.0-volt lithium-ion cordless 1/2-in. impact wrench


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20.0-Volt Lithium-ion Cordless
1/2-in. impact Wrench
No. 320.66810
Powered by an
qualified battery
charger for a
better environment
To reduce
the risk of injury,
the user must read and understand
this Operator's
this product.
• Warranty
• Safety
• Assembly
• Operation
• Maintenance
Sears, Roebuck and Co., Hoffman Estates, IL 60179


Table of Contents

Summary of Contents for Craftsman 320.66810

  • Page 1 To reduce the risk of injury, the user must read and understand • Assembly • Operation this Operator's manual before using • Maintenance this product. Charge battery before first Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A. 2341141001...
  • Page 2: One Year Full Warranty

    Sears store or Parts & Repair Center or other Craftsman outlet in the United States for free repair (or replacement, if repair proves impossible). This warranty...
  • 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 symbol warnings do not, by themselves, eliminate any danger. The instructions and warnings they give are no substitutes for proper accident-prevention measures.
  • 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 safer. SYMBOL NAME DESIGNATION/EXPLANATION Volts Voltage Amperes Current Hertz Frequency (cycles...
  • Page 5 GENERAL POWER TOOL SAFETY WARNINGS WARNING: Read all safety warnings and instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury. The term "power tool" in all of the warnings listed below refers to corded power tools or battery-operated (cordless)
  • Page 6: Personal Safety

    PERSONAL SAFETY • Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal...
  • Page 7 POWER TOOL USE AND CARE • Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designated. Do not use the power tool if the switch does not turn it ON and OFF. Any power tool that cannot be controlled with the switch is dangerous...
  • Page 8 BATTERY TOOL USE AND CARE • Make sure that the switch is in the OFF position before inserting the battery pack. Inserting the battery pack into power tools that have the switch invites accidents. Recharge only with the charger specified by the manufacturer.
  • Page 9 • If liquid from the battery gets in your eyes, flush them with clean water for at least 10 minutes, and then seek immediate medical attention. Following this rule will reduce the risk of serious personal injury. SERVICE Have your power tool serviced by a qualified repair person using only identical replacement parts.
  • Page 10 • Do not run the tool while carrying it at your side. A spinning bit could become entangled with clothing and injury may result. Place the tool onto the fastener only when the tool is switched OFF. Rotating driver tools can slide off the fastener. Do not use this tool as a drill.
  • Page 11: Important Safety Instructions

    Do not allow gasoline, oils, petroleum-based products, etc. to come in contact with plastic parts. These materials contain chemicals that can damage, weaken, or destroy plastic. An extension cord should not be used unless absolutely necessary. Use of an improper extension cord could result in a risk of fire and electric shock.
  • Page 12 CAUTION: To reduce the risk of injury, charge only lithium-ion rechargeable batteries. Other types of batteries may burst, causing personal injury or damage. WARNING: When using electric appliances, basic precautions should always be followed, including the following. a) To reduce the risk of injury, close supervision is necessary when an appliance is used near children.
  • Page 13: Specification

    KNOW YOUR iMPACT WRENCH (Fig.l) Fig. 1 1/2" Square Drive Direction-of- Rotation Selector (Forward/Lock-off/ Reverse) Variable-speed Trigger Switch LED Worklight Battery Pack Power Bar Battery-Pack Release Button PRODUCT SPECIFICATION Motor 20 Volt DC Switch VSR (Variable Speed Reversible) No Load Speed 0-1900 RPM Impacts per minute...
  • Page 14 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 15: Power Bar

    POWER BAR This Lithium-Ion battery pack is equipped with a POWER BAR, which is used to display the battery pack's remaining run time. Press the POWER BAR button to display the LED lights. The LED lights will remain lit for approximately 4 seconds.
  • Page 16: Operation

    SmartChip BATTERY PROTECTION SmartChip intuitive circuitry protects the battery pack from extreme temperature, over-discharge and over-charge. To protect the battery from damage and prolong its life, the battery pack's SmartChip circuitry will turn off the battery pack if it becomes overloaded or if the temperature becomes...
  • Page 17 • Due to Lithium-Ion's fade-free properties, the only time it is necessary charge the Lithium-Ion battery pack is when the pack has reached the end of its charge. To signal the end of charge, power to the tool will drop quickly. Charge the battery pack as needed.
  • Page 18 CHARGING A HOT BATTERY PACK If the battery pack is above normal temperature range, the red LED will illuminate and the green LED will be off. When the battery pack cools down to approximately 104°F (40°C), the charger will automatically begin charging.
  • Page 19 TO ATTACH BATTERY PACK Fig. 5 (Fig. 5} Lock the trigger switch on the impact Wrench placing the direction rotation (forward/reverse/ center lock) selector in the center position. Align the raised rib on the battery pack with the grooves on the bottom of the Wrench, and then attach the battery pack to the Wrench.
  • Page 20: Direction Of Rotation

    DIRECTION-OF-ROTATION SELECTOR (FORWARD/REVERSE/CENTER LOCK) (Fig. 6) The direction of bit rotation is reversible and is controlled by a selector located above the trigger switch. With the Impact Wrench held in normal operating position: Position the direction-of-rotation selector to the left of the tool for forward rotation.
  • Page 21: Installing And Removing

    iNSTALLiNG AND REMOVING SOCKET (Fig.8) Lock the trigger switch by Fig. 8 placing the direction-of- rotation selector in the OFF (center) position. To install a 1/2" socket (sold separately), simply push it completely onto the output drive. To remove, pull it off the output drive.
  • Page 22: Maintenance

    To avoid serious personal injury, always remove the battery pack from the tool when cleaning or performing any maintenance. WARNING: When servicing, use only identical Craftsman replacement parts. Use of any other parts may create a hazard or cause product damage. WARNING: It is not recommended...
  • Page 23: Battery Pack Removal And Preparation For Recycling

    BATTERI ES: The battery pack for this tool is equipped with Lithium-ion rechargeable batteries. The duration of use from each charge will depend on the type of work performed. The batteries for this tool have been designed provide maximum trouble-free life.
  • Page 24 PROBLEM CAUSE SOLUTION The Impact Wrench Battery is depleted Charge the battery does not work Bits can not be installed Does not use the proper Use suitable adapter adapter Motor overheating Be sure cooling vents Clean, clear vents. Do are free from dust and not cover with hand obstacles during operation...
  • Page 25 20.0 VOLT LITHIUM=ION CORDLESS 1/2=iN. iMPACT WRENCH MODEL 320. 66810 The Model Number will be found on the Nameplate attached to Impact Wrench. Always mention the Model Number when ordering parts for this tool. 66810 ManuaLRevised_09 0407 Page 25...
  • Page 26 20.0 VOLT LITHIUM=ION CORDLESS 1/2=iN. iMPACT WRENCH MODEL 320. 66810 The Model Number will be found on the Nameplate attached to Impact Wrench. Always mention the Model Number when ordering parts for this tool. 2770182000 5126 Power Pack 2790163000 Motor And Gear Assy 3123112000 O Ring 3123133000...
  • Page 27 5610024000 Tapping Screw 5610106000 i Tapping Screw 5610228000 I Tapping Screw 5620049000 Screw 5650014000 Plain Washer 5650015000 Spring Washer 5650272000 Washer 5650273000 Washer 5650275000 Washer 5650276000 Washer 5650296000 Washer 5670239000 5690170000 Rubber Ring 5690171000 Rubber Ring 5690172000 Rubber Ring 5690188000 Rubber Ring 5700018000 Ball Bearing...
  • Page 28 Your Home For expert troubleshooting and home solutions advice: manage home 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 For Sears professional installation of home appliances...

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