Bosch Power Tools 3912 Maintenance Lubrication, Service, Carbon Brushes, Motor Brush Replacement

Maintenance and
Lubrication	FIG. 37

Service

!WARNING 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.

Motor Brush Replacement

To Inspect or Replace Brushes: receive

1.Unplug the saw.

!CAUTION 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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