6-14 ELECTRICAL SYSTEM
STARTER MOTOR INSPECTION
CARBON BRUSH
Inspect the brushes for abnormal wear, cracks or smoothness in
the brush holder.
If any defects are found, replace the housing end assembly with
a new one.
Measure the brush length with a vernier calipers. If brush length
is less than the service limit, replace the housing end assembly
with a new one.
09900-20101: Vernier caliprs
Brush length
Service Limit: 2.75 mm (0.108 in)
COMMUTATOR
Inspect the commutator for discoloration, abnormal wear or
undercut A.
If abnormal wear is found, replace the armature with a new one.
If the commutator surface is discolored, polish it with #400 sand
paper and wipe it with a clean dry cloth.
If there is no undercut, scrape out the insulator with a saw blade.
1 Insulator
2 Segment
ARMATURE COIL INSPECTION
Check for continuity between each segment and between each
segment and the armature shaft with the multi-circuit tester.
If there is no continuity between the segments or there is conti-
nuity between the segments and shaft, replace the armature
with a new one.
09900-25008: Multi-circuit tester set
Tester knob indication: Continuity test ()
BEARING
Inspect the bearing for wear or damage.
Check the smooth rotation of the bearing by finger.
If any wear or damage is found, replace the housing end assem-
bly.
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