6Speed change12002691Two speed ranges can be preselected with the speedchange knob.To change the speed, turn the speed change knob so thatthe arrow on the tool body points toward the "I" positionon the knob for low speed or "II" position for high speed.If it is hard to turn the knob, first turn the chuck slightly ineither direction and then turn the knob again.CAUTION:• Use the speed change knob only after the toolcomes to a complete stop. Changing the tool speedbefore the tool stops may damage the tool.• Always set the speed change knob to the correctposition. If you operate the tool with the speedchange knob positioned halfway between the "I"and "II" position, the tool may be damaged.Selecting the action mode1004289This tool has an action mode change lever. For rotationwith hammering, slide the action mode change lever tothe right ( symbol). For rotation only, slide the actionmode change lever to the left ( symbol).CAUTION:• Always slide the action mode change lever all theway to your desired mode position. If you operatethe tool with the lever positioned halfway betweenthe mode symbols, the tool may be damaged.ASSEMBLYCAUTION:• Always be sure that the tool is switched off andunplugged before carrying out any work on the tool.Installing side grip (auxiliary handle)1234002693Always use the side grip to ensure operating safety.Install the side grip so that the teeth on the grip fit inbetween the protrusions on the tool barrel.Then tighten the grip by turning clockwise at the desiredposition. It may be swung 360° so as to be secured atany position.Installing or removing drill bitFor Model HP2070, HP2070F1002694To install the bit, place it in the chuck as far as it will go.Tighten the chuck by hand. Place the chuck key in eachof the three holes and tighten clockwise. Be sure totighten all three chuck holes evenly.To remove the bit, turn the chuck key counterclockwise injust one hole, then loosen the chuck by hand.After using the chuck key, be sure to return to the originalposition.For Model HP2071, HP2071F120026951. Sleeve2. Ring1. Chuck key1. Grip base2. Side grip(auxiliaryhandle)3. Teeth4. Protrusions1. Action modechanging lever1. Arrow2. Speed changeknob