Maintenance - Bosch 1278VSK Operating/Safety Instructions Manual

BM 2609931631 9/00 2/14/01 4:42 PM
Service
Preventive maintenance
WARNING
!
performed by unauthorized
personnel may result in misplacing of
internal wires and components which
could cause serious
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
If an extension cord is
WARNING
!
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.
* 10 Sanding belts
* Auxiliary handle
* Carrying case
Page 9

Maintenance

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.
hazard. We
WARNING
!
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 at-
tempt to clean by inserting pointed objects
through openings.
CAUTION
!
parts. Some of these are: gasoline, carbon
tetrachloride, chlorinated cleaning solvents,
ammonia and household detergents that
contain ammonia.
Accessories
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
Tool's
Ampere
Cord Length in Feet
Rating
25
3-6 18
6-8 18
8-10 18
10-12
16
12-16 14
** Bench Mount kit
** Vacuum Hose
(*= standard equipment)
(**= optional accessories)
-9-
Cleaning
To avoid accidents always
disconnect the tool from the
Certain cleaning agents and
solvents damage plastic
Cord Size in A.W.G. Wire Sizes in mm
Cord Length in Meters
50 100 150 15 30 60 120
16 16 14 .75 .75 1.5 2.5
16 14 12 .75 1.0 2.5 4.0
16 14 12 .75 1.0 2.5 4.0
16 14 12 1.0 2.5 4.0 —
12 — — — — — —
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