Alternator - Kubota D1503-M-DI Workshop Manual

03-M-DI Series, WSM

(2) Alternator

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.
Allowabl
e limit
Factory spec.
Difference of O.D.'s
Allowable limit
Factory
spec.
Mica under cut
Allowable limit
(1) Segment
(2) Depth of Mica
(3) Mica
Bearing
1. Check the bearing for smooth rotation.
2. If it does not rotate smoothly, replace it.
S-98
DIESEL ENGINE
D1503-M-DI
D1503-M-DI-T
30.0 mm
D1703-M-DI
1.181 in.
D1803-M-DI
V2203-M-DI
35.0 mm
V2403-M-DI
1.378 in.
D1503-M-DI
D1503-M-DI-T
29.0 mm
D1703-M-DI
1.142 in.
D1803-M-DI
V2203-M-DI
34.0 mm
V2403-M-DI
1.339 in.
Less than 0.02 mm
0.0008 in.
0.05 mm
0.0020 in.
D1503-M-DI
D1503-M-DI-T
0.50 to 0.80 mm
D1703-M-DI
0.0197 to 0.0315 in.
D1803-M-DI
V2203-M-DI
0.50 to 0.90 mm
V2403-M-DI
0.0197 to 0.0354 in.
0.20 mm
0.0079 in.
(a) Correct
(b) Incorrect
W1155802
W1019790
KiSC issued 10, 2009 A