Maintenance And Lubrication - Bosch 3912 Operating/Safety Instructions Manual

Maintenance and
Lubrication
Service
Preventive maintenance performed
by unauthorized 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.
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.
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Motor Brush Replacement
To inspect or Replace Brushes: receive
1. Unplug the saw.
Ervwr_ 1 k ii .__ *_._1./ [e] #• 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 1 (Figure 37). 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. install new brush. The two (2) tabs on the brush terminal
2 go in the same hole the carbon part fits into.
5. Tighten the brush cap but do not overtighten.
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