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▶ Service
Preventive maintenance
performed by unautho -
rized 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.
▶ Motor 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
2-6 months the brushes be examined. Only
genuine Bosch replacement brushes specially
designed for your tool should be used.
▼ MOTOR BRUSH REPLACEMENT
To inspect or replace brushes:
1. Unplug the saw.
The brush cap is spring-
loaded by the brush
assembly.
2.
Remove the brush cap on the motor using a
wide, flat-blade screwdriver.
3.
Pull out the brush (see Figure 64). Repeat
for the opposite side.
NOTE: If installing the existing brush or
brushes, make sure the brush goes in the
same way it came out. Otherwise, a break-in
period will occur that will reduce motor
performance and increase brush wear.
4.
Inspect brushes for wear. On the wide, flat
side of brush is a wear limit line. If the brush
contact face is at or beyond (no line visible)
the limit, replace brushes as a set.
5.
Install new brush. The two tabs on the
brush terminal go in the same hole the
carbon part fits into.
6.
Tighten the brush cap but do not
overtighten.
Figure 64. Motor Brush
▶ Drive Belt
The drive belt is a long life component;
however, after extensive use, it may require
cleaning or replacement. Dust and debris may
enter through the ventilation system and
affect
the
performance
of
the
belt.
Periodically, the drive belt should be
inspected for excessive wear. If the belt
shows signs of drying out, cracking or tearing,
it should be replaced. If the belt will not track
properly or comes off the pulleys, it should be
replaced.
Belt replacement should only be
performed by an authorized service center.
▼ CLEANING / INSPECTING DRIVE BELT:
1.
Unplug the saw.
2.
Remove the two belt cover screws using a
#2 Phillips screwdriver.
Figure 65. Drive Belt
3.
Clean area with a brush or compressed air.
4.
Inspect the belt. If dried out, cracked or
excessively loose, it may require service
and/or replacement.
To avoid possible injury,
do
not
attempt
to
replace the drive belt (replacement requires
special tools). Take saw to an authorized
Bosch service center.
5.
Replace belt cover and two cover screws.
Drive Belt
Maintenance and Lubrication
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