wsm wg972-e4, Workshop Manual

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ENGINE
WG972-E4, WSM
1-S58
(8) Starter
Overrunning Clutch
1. Inspect the pinion for wear or damage.
2. If there is any problem, 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.
9Y1211108ENS0102US0
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.
9Y1211108ENS0103US0
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.
9Y1211108ENS0104US0
Commutator O.D.
Factory specification
30.0 mm
1.18 in.
Allowable limit
29.0 mm
1.14 in.
Difference of O.D.'s
Factory specification
Less than
0.02 mm
0.0008 in.
Allowable limit
0.05 mm
0.002 in.
Mica under cut
Factory specification
0.50 to 0.80 mm
0.020 to 0.031 in.
Allowable limit
0.20 mm
0.0079 in.
(1) Segment
(2) Undercut
(3) Mica (a) Good
(b) Bad
Brush length (A)
Factory specification
14.0 mm
0.551 in.
Allowable limit
9.0 mm
0.35 in.
(A) Brush Length
KiSC issued 07, 2015 A