Starter - Kubota WSM 07-E3B Series Workshop Manual

07-E3B SERIES, WSM

(8) 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.
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.
Factory spec.
Commutator O.D.
Allowable limit
Factory spec.
Mica under cut
Allowable limit
(1) Segment
(2) Depth of Mica
(3) Mica
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.
Factory spec.
Brush length (A)
Allowable limit
(A) Brush Length
S-111
ENGINE
W1075769
32.0 mm
1.26 in.
31.4 mm
1.24 in.
0.50 mm
0.020 in.
0.20 mm
0.0079 in.
(a) Good
(b) Bad
W1075277
18.0 mm
0.709 in.
11.0 mm
0.433 in.
W1075476
KiSC issued 06, 2020 A