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manual abstract
lead to potential injury. TO LOCK TOOL “ON”: turn the selector dial VARIABLE SPEED DIAL to the Hammering Only mode and squeeze Your tool is equipped with a variable speed the trigger switch until it locks. dial. The speed and impact force can be TO TURN TOOL: “OFF“ press the trigger adjusted by rotating the dial. Higher speeds release switch and the trigger will return to and impact force work best for faster the “OFF” position automatically. penetration when drilling or chiseling in hard To increase switch life, do not turn switch on masonry material. Slower speeds work best and off while tool is under load. to reduce breakout when bits exit material -7 BM 1619929548 2/03 2/12/03 12:37 PM Page 8 being drilled or chiseling material such as plaster or tile. Regardless of the pressure applied on the trigger, the tool will not operate any faster than maximum speed setting selected. "TURBO" FEATURE In the "Hammer Only" mode power is automatically increased 20% when the tool is turned on to provide maximum chiselling performance. CONSTANT RESPONSE CIRCUITRY The internal electronic feedback system provides a "soft start", which will reduce the stresses that occur from a high torque start. The system also helps to keep the preselected impact rate and rotating speed virtually constant between no-load and load conditions. SELECTOR LEVER The selector lever allows the tool to be set for various applications as listed in the following chart, (Fig. 4). When using demolition or chipping bits such as bull points, chisels, spades, gouges, etc. the “Hammer Only” mode must be selected. SELECTOR LEVER - “VARIO-LOCK” The vario-lock can be set in any one of twelve positions (30° increments). Choose a position which is best suited for your operation. The Vario-Lock position is intended for use with chipping bits such as bull points, spades, gouges, etc. Turn the selector lever, to the “vario-lock” setting. Next, rotate the locking sleeve, along with the accessory, to the desired position. Then turn the selector lever to the “hammer only” setting and slightly turn the locking sleeve to have it automatically lock into a definite position. SLIP CLUTCH The tool has a internal pre-set slip clutch. The output spindle will stop rotating if the accessory binds and overloads the tool. AUXILIARY HANDLE The tool must be supported with the auxiliary handle, which can be swiveled 360°. To reposition and/or swivel the handle, loosen the hand grip, move the handle to the desired position along the barrel and securely retighten the hand grip. POWER INDICATOR LIGHT When you plug your tool into the power source, the power indicator light will go “ON” indicating the tool is receiving power. Drilling/Hammering: used for drilling with solid carbide bits and core bits Hammering Only: used for chipping and demolition work Vario-Lock: allows chisel to be set in one of 12 positions (right or left “0” position) FIG. 4 "TOOL TIPS" realized. This period may require up to 5 For the best penetration rates in concrete, hours of operation. run the tool with a steady pressure, but do A combination hammer is likely to be thenot use excessive force as this will decrease most expensive portable tool at thethe efficiency of the tool. construction job. The long wear and efficient All hammers require a short period of time to operation of the BOSCH hammers will more warm up. Depending on the room than justify the cost for tools of this type. As temperature, this time may vary from earlier pointed out, sharp accessories as well approximately 15 seconds (90°F) to 2 as clean air vents are necessary for efficient minutes (32°F). A new hammer requires a operation. Establish and follow a set break-in period before full performance is maintenance program. -8 BM 1619929548 2/03 2/12/03 12:37 PM Page 9 Maintenance Service Preventive maintenance performed by unauth ! WARNING orized personnel may result in misplacing of internal wires and components which could cause serious hazard. We recommend that all tool service be performed by a Bosch Factory Service Center or Authorized Bosch Service Station. SERVICE REMINDER LIGHT When the service reminder light lights up or blinks, this will indicate that the cut-out carbon brushes will switch off the tool in approximately 8 hours. After that period, the light will go off and the tool will stop running. The tool must then be sent to a service center for service. TOOL LUBRICATION Your Bosch tool has been properly lubricated and is ready to use. It is recommended that tools with gears be regreased with a special gear lubricant at every brush change. CARBON BRUSHES The brushes and commutator in your tool have been engineered for many hours of dependable service. To maintain peak efficiency of the motor, we recommend every two to six months the brushes be examined. Only genuine Bosch replacement brushes specially designed for your tool should be used. BEARINGS After about 300-400 hours of operation, or at every second brush change, the bea...
Other models in this manual:Power Screwdrivers and Drills - 11248EVS (1.12 mb)