Servicing - Kubota WSM J Series Workshop Manual

J SERIES, WSM

(3) Servicing

(A) Starter
Bearing on Drive End Side
1. Press out the bearing from drive end frame (3) with a press and
jig (1).
(1) Jig
(2) Block
Bearing at Slip Ring Side
1. Lightly secure the rotor (1) with a vise to prevent damage, and
remove the bearing (2) with a puller (3).
(1) Rotor
(2) Bearing
Commutator and Mica
1. Check the contact 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 it 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
S-115
ENGINE
(3) Drive End Frame
W1155468
(3) Puller
W1155653
Z482 28.0 mm
D722 1.102 in.
D1005 30.0 mm
V1305 1.1811 in.
Z482 27.0 mm
D722 1.063 in.
D1005 29.0 mm
V1305 1.1417 in.
Z482 0.5 to 0.8 mm
D722 0.0197 to 0.0315 in.
D1005 0.5 to 0.8 mm
V1305 0.0197 to 0.0315 in.
0.2 mm
0.0079 in.
(a) Good
(b) Bad
W1155802
KiSC issued 10, 2016 A