83
ELECTRICAL
ELECTRIC STARTER SYSTEM
4
Measure commutator outside diameter.
•
Standard: 1.14 in. (29.0 mm)
•
Service limit: 1.10 in. (28.0 mm)
If measurement exceeds service limit, replace
armature.
Check that mica (insulator) between the segments
is undercut to specified depth.
•
Standard: 0.02 to 0.03 in. (0.5 to 0.8 mm)
•
Service limit: 0.01 in. (0.2 mm)
If measurement exceeds service limit, cut to spec-
ified depth.
IMPORTANT:
Remove all particles of mica and
metal with compressed air.
Check for continuity between the commutator and
the armature core/shaft. Replace armature if con-
tinuity is indicated.
Check for continuity between adjacent commuta-
tor segments. Replace armature if no continuity is
indicated.
004755
1.
Mica
2.
Segment
3.
Undercut
004756
1.
Commutator
2.
Armature core
3.
Armature shaft
004757
004758