Dewalt DCF899M1 Instruction Manual - Page 10

English NOTE: Battery packs should not be stored completely depleted of charge. The battery pack will need to be recharged before use. SAVE THESE INSTRUCTIONS FOR FUTURE USE Motor Be sure your power supply agrees with the nameplate marking. Voltage decrease of more than 10% will cause loss of power and overheating. DeWALT tools are factory tested; if this tool does not operate, check power supply. COMPONENTS (FIG. A) WARNING: Never modify the power tool or any part of it. Damage or personal injury could result. Refer to Figure A at the beginning of this manual for a complete list of components. Intended Use This impact wrench is designed for professional impact fastening and drilling applications. The impact function makes this tool particularly useful for driving fasteners in wood, metal and concrete. DO NOT use under wet conditions or in presence of flammable liquids or gases. DO NOT let children come into contact with the tool. Supervision is required when inexperienced operators use this tool. OPERATION WARNING: To reduce the risk of serious personal injury, turn unit off and disconnect it from power source remove the battery pack before making any adjustments or removing/installing attachments or accessories. An accidental start-up can cause injury. Installing and Removing the Battery Pack (Fig. D) NOTE: For best results, make sure your battery pack is fully charged. To install the battery pack 6 into the tool handle, align the battery pack with the rails inside the tool's handle and slide it into the handle until the battery pack is firmly seated in the tool and ensure that it does not disengage. To remove the battery pack from the tool, press the release button 5 and firmly pull the battery pack out of the tool handle. Insert it into the charger as described in the charger section of this manual. Fig. D 6 5 Proper Hand Position (Fig. E) WARNING: To reduce the risk of serious personal injury, ALWAYS use proper hand position as shown. WARNING: To reduce the risk of serious personal injury, ALWAYS hold securely in anticipation of a sudden reaction. Proper hand position requires one hand on the main handle 4 . Fig. E 4 Variable Speed Trigger Switch (Fig. A) To turn the tool on, squeeze the trigger switch 1 . To turn the tool off, release the trigger switch. Your tool is equipped with a brake. The anvil will stop when the trigger switch is fully released. The variable speed switch enables you to select the best speed for a particular application. The more you squeeze the trigger, the faster the tool will operate. For maximum tool life, use variable speed only for starting holes or fasteners. NOTE: Continuous use in variable speed range is not recommended. It may damage the switch and should be avoided. Forward/Reverse Control Button (Fig. A) A forward/reverse control button 2 determines the direction of the tool and also serves as a lock-off button. To select forward rotation, release the trigger switch and depress the forward/reverse control button on the right side of the tool. To select reverse, release the trigger switch and depress the forward/reverse control button on the left side of the tool. 8