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BM 1619929548 2/03
2/12/03
12:37 PM
Page 7
Operating Instructions
INSTALLING ACCESSORIES Clean the insert shank end of the accessory to remove any debris, then lightly grease with a light oil or lubricant. Insert accessory into the tool holder, while twisting and pushing inward until it locks automatically into place (Fig. 2). (Model 11248 only) To install hex round chisels, align flat on chisel with alignment mark on tool holder, then push chisel into tool holder until it lock automatically into place. Pull outward on the accessory to be certain it is locked into the tool holder (Fig. 3). REMOVING ACCESSORIES WARNING Accessories may be hot ! after use. Avoid contact with skin and use proper protective gloves or cloth to remove. To remove an accessory, pull and hold locking sleeve backward and pull bit forward. All accessories should be wiped clean after removing. NOTE: The high efficiency available from the rotary hammers can only be obtained if sharp and undamaged accessories are used. The "cost" to maintain sharp and undamaged accessories is more than offset by the "time saved" in operating the tool with sharp accessories. TRIGGER CONTROLLED VARIABLE SPEED Your tool is equipped with a variable speed trigger switch. The tool speed can be controlled from minimum to maximum nameplate rated RPM by the pressure you apply to the trigger. Apply more pressure to increase the speed and release pressure to decrease speed (Fig. 1). Your tool is also equipped with a "Lock-ON" feature when the selector dial is in the Hammering Only mode which allows continuous operation without holding the trigger. TO LOCK TOOL �ON�: turn the selector dial to the Hammering Only mode and squeeze the trigger switch until it locks. TO TURN TOOL: �OFF� press the trigger release switch and the trigger will return to the �OFF� position automatically. To increase switch life, do not turn switch on and off while tool is under load.
FIG. 2
LOCKING SLEEVE
HEX ROUND CHISEL
FLAT ALIGNMENT MARK
FIG. 3
LOCKING SLEEVE
AUTO-MAX � The patented Bosch Auto-Max system insures that each time your tool is plugged in and receiving power, it will operate at maximum speed and impact force. WARNING When the power cord is ! unplugged from the mains outlet or when branch-circuit power is interrupted, the electronic controller will automatically reset the tool to maximum speed and impact force. Unexpected starting at maximum operating speed and impact force could startle the operator and lead to potential injury. VARIABLE SPEED DIAL Your tool is equipped with a variable speed dial. The speed and impact force can be adjusted by rotating the dial. Higher speeds and impact force work best for faster penetration when drilling or chiseling in hard masonry material. Slower speeds work best to reduce breakout when bits exit material
