Bosch 1873-8 Operating Instructions - Page 12

BM 1609929H54 08-06 8/3/06 11:44 AM Page 12 Maintenance Service ! WARNING Preventive maintenance performed by unauth- 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 Autho- rized Bosch Service Station. 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 bearings should be replaced at Bosch Factory Service Center or Authorized Bosch Service Station. Bearings which become noisy (due to heavy load or very abrasive material cutting) should be replaced at once to avoid overheating or motor failure. Cleaning ! WARNING To avoid accidents always disconnect the tool from the power supply before cleaning or performing any maintenance. The tool may be cleaned most effectively with compressed dry air. Always wear safety goggles when cleaning tools with compressed air. Ventilation openings and switch levers must be kept clean and free of foreign matter. Do not attempt to clean by inserting pointed objects through openings. ! CAUTION Certain cleaning agents and solvents damage plastic parts. Some of these are: gasoline, carbon tetrachloride, chlorinated cleaning solvents, ammonia and household detergents that contain ammonia. Accessories ! WARNING If an extension cord is necessary, a cord with adequate size conductors that is capable of carrying the current necessary for your tool must be used. This will prevent excessive voltage drop, loss of power or overheating. Grounded tools must use 3-wire extension cords that have 3-prong plugs and receptacles. NOTE: The smaller the gauge number, the heavier the cord. RECOMMENDED SIZES OF EXTENSION CORDS 120 VOLT ALTERNATING CURRENT TOOLS Tool's Ampere Rating Cord Size in A.W.G. Wire Sizes in mm2 Cord Length in Feet Cord Length in Meters 25 50 100 150 15 30 60 120 3-6 6-8 8-10 10-12 12-16 18 16 16 14 18 16 14 12 18 16 14 12 16 16 14 12 14 12 - - 0.75 0.75 1.5 2.5 0.75 1.0 2.5 4.0 0.75 1.0 2.5 4.0 1.0 2.5 4.0 - --- - * Wheel guard * Side handle ** Lock nut wrench (grinding) ** Backing flange (grinding) ** Lock nut (grinding) (*= standard equipment) (**= optional accessories) ** Grinding wheel ** Backing flange (sanding) ** Rubber backing pad (sanding) ** Lock nut wrench (sanding) Wheel guard must be used when sander is converted for grinding operations. -12-