TM 5-3805-280-24-2
Robert Bosch Alternator Repair
30
REPLACING CARBON BRUSHES
10
8
Replace carbon brushes if dimension (A) is less than
5 mm (0.2 in.).
Solder new carbon brushes in such a way that dimension
(A) does not exceed 10 mm (0.4 in.).
IMPORTANT: The service life of carbon brushes and
ball bearings are matched to each
other. Therefore, always replace ball
bearings when renewing carbon
brushes. Before installing new carbon
brushes, slip rings must be checked
and turned down if necessary.
NOTE: When soldering copper lead, make sure solder
(rosin/tin solder only) does not seep into the
copper leads.
RG,RG34710,2159
1915Mar971/1
REPLACING BALL BEARINGS
Remove attaching screws (A) of drive end frame retaining
plate and force rotor out of drive end frame.
Pull off rotor ball bearing.
Removed ball bearings must be replaced.
RG,RG34710,2160
1915Mar971/1
CHECKING POSITIVE DIODES
Consecutively place positive test probe of ohmmeter to
positive heat sink (A) and negative test probe to leads (B)
of diodes.
Meter must not show continuity.
Continued on next page
RG,RG34710,2161
1915Mar971/2
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