S-66
WG972-E2, DF972-E2, WSM
GASOLINE / LPG ENGINE
(7) Starter
Overrunning Clutch
1. Inspect the pinion for wear or damage.
2. If there is any defect, replace the overrunning clutch assembly.
3. Check that the pinion turns freely and smoothly in the
overrunning direction and does not slip in the cranking direction.
4. If the pinion slips or does not rotate in the both directions, replace
the overrunning clutch assembly.
W1075769
Commutator and Mica
1. Check the contact face of the commutator for wear, and grind the
commutator with emery paper if it is slightly worn.
2. Measure the commutator O.D. with an outside micrometer at
several points.
3. If the minimum O.D. is less than the allowable limit, replace the
armature.
4. If the difference of the O.D.’s exceeds the allowable limit, correct
the commutator on a lathe to the factory specification.
5. Measure the mica undercut.
6. If the undercut is less than the allowable limit, correct if with a saw
blade and chamfer the segment edges.
W1075277
Brush Wear
1. If the contact face of the brush is dirty or dusty, clean it with emery
paper.
2. Measure the brush length (A) with vernier calipers.
3. If the length is less than the allowable limit, replace the yoke
assembly and brush holder.
W1075476
Commutator O.D.
Factory spec.
28.0 mm
1.102 in.
Allowable limit
27.0 mm
1.063 in.
Difference of O.D.'s
Factory spec.
Less than 0.05 mm
0.0020 in.
Allowable limit
0.40 mm
0.0157 in.
Mica under cut
Factory spec.
0.50 to 0.80 mm
0.0197 to 0.0315 in.
Allowable limit
0.20 mm
0.0079 in.
(1) Segment
(2) Undercut
(3) Mica
(a) Good
(b) Bad
Brush length (A)
Factory spec.
16.0 mm
0.630 in.
Allowable limit
10.5 mm
0.413 in.
(A) Brush Length
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