Commutator Mica Depth; Inspect Starter Brush - Hyundai Seasall S250S Workshop Manual

Engine Electrical System
• If the commutator run out is not within the service
limit, replace the armature.
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Standard (New) : 0.02mm (0.0008in.) max
Service limit : 0.05mm (0.0020in.)
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7. Check the mica depth(A). If the mica is too high(B),
undercut the mica with a hacksaw blade to the proper
depth. Cut away all the mica(C) between the
commutator segments. The undercut should not be
too shallow, too narrow, or v-shaped(D).

Commutator mica depth

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Standard (New) : 0.5 mm (0.0197 in.)
Limit : 0.2mm (0.0079 in.)
8. Check for continuity between the segments of the
commutator. If an open circuit exists between any
segments, replace the armature.
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9. Check with an ohmmeter that no continuity exists
between the commutator(A) and armature coil
core(B), and between the commutator and armature
shaft(C). If continuity exists, replace the armature.

Inspect starter brush

Brushes that are worm out, or oil-soaked, should be
replaced.
Starting System