Starting System: 1I-12
Assembly
Assembly is in the reverse order of disassembly with
special attention to the following steps.
Reassemble the starter motor, refer to “Starter Motor
Components” (Page 1I-9).
When installing the armature, use care to
avoid breaking the brushes.
Starter Motor Components Inspection and
Servicing
ZAJ6111906005
Armature and Commutator
• Inspect the commutator surface. If surface is gummy
or dirty, clean with # 500 grit emery paper (1).
• Measure the commutator outside diameter. If the
measurement exceeds the service limit, replace the
armature.
Special tool
(A): 09900–20101 (Vernier calipers (150
mm))
Commutator outside diameter
Standard: 29.0 mm (1.14 in.)
Service limit: 28.0 mm (1.10 in.)
• Check that the mica (insulator) between the segments
is undercut to specified depth.
If the measurement exceeds the service limit, cut to
the specified depth.
Wear safety glasses when using compressed
air.
NOTE
Remove all particles of mica and metal using
compressed air.
Commutator undercut “a”
Standard: 0.5 – 0.8 mm (0.02 – 0.03 in.)
Service limit: 0.2 mm (0.01 in.)
1
2. Mica 3. Segment
(A)
3
2
“a”
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