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Service
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 Authorized 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 cut-
ting) should be replaced at once to avoid
overheating or motor failure.
Cleaning
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.
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.
!
WARNING
!
WARNING
Maintenance
!
CAUTION
* Wheel guard * Lock nut
* Grinding wheel * Backing flange
* Side handle * Lock nut wrench
(*= standard equipment)
(**= optional accessories)
Accessories
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
!
WARNING
Tool’s
Ampere
Rating
Cord Size in A.W.G.
Wire Sizes in mm
2
3-6
6-8
8-10
10-12
12-16
18 16 16 14 0.75 0.75 1.5 2.5
18 16 14 12 0.75 1.0 2.5 4.0
18 16 14 12 0.75 1.0 2.5 4.0
16 16 14 12 1.0 2.5 4.0 —
14 12 — — — — — —
25 50 100 150 15 30 60 120
Cord Length in Feet Cord Length in Meters
BM 1609929F52 10/03 10/28/03 3:34 PM Page 12