Service Manual

COMMUTATOR AND MICA
Inspection/Service
Commutator: Refer to Figure 6. Clean commutator surface with
sandpaper. Measure the commutator outside diameter at several points. If
the difference of the outside diameter is not as specified in Table 1, correct
the commutator on a lathe to factory specifications. If the minimum outside
diameter is less than the allowable limit, replace the armature.
Mica: Refer to Figure 7. Measure the mica undercut depth. If the undercut
is less than that specified in Table 1, use a saw blade to increase the depth
and then chamfer the segment edges.
OVERRUNNING CLUTCH
Inspection/Service
CAUTION: Do not clean overrunning clutch in liquid cleaning solutions. as
it will damage the starter.
Refer to Figure 8. Inspect the pinion and spline teeth for wear and
damage. If wear or damage exists, replace pinion. Rotate the pinion
clockwise and see if it turns freely. Replace pinion if it doesn’t. Rotate the
pinion counterclockwise to see if it locks. Replace pinion if it doesn’t.
BRUSHES
Inspection/Service
Refer to Figure 9. Clean the brush face with sandpaper. Measure the brush
length. If the length is not as specified in Table 1, replace the starter body
and brush holder.
STARTER BODY
Inspection/Service
Refer to Figure 10. Check for continuity across the starter body and
brushes. There are four brushes in the starter body. The two that are not
grounded are 180° apart starting at the terminal which connects to the
solenoid. The two that are grounded are located 90° from the non-
grounded terminals. If continuity exists at the non-grounded terminals,
replace the starter body. If continuity does not exist at the grounded
terminals, replace the starter body.
Assembly
Assemble the starter in the reverse of disassembly, but apply grease to the
parts indicated.
• solenoid joint
• drive lever
• pinion gear teeth
• armature shaft
Figure 10
Figure 8
Figure 7
Figure 6
Figure 9
Commutator
Mica
undercut
depth
Segment
Edges
Saw
Blade
Pinion
Brush
Starter
body
Brush
Non-Grounded
Terminal
Grounded
Terminal
(hidden)
Glossary
GLOSSARY
Demystification Guide 3-25