Commutator And Mica - Kubota D1503-M Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG WSM

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.
Difference of O.D.'s
Allowable limit
(1) Segment
(2) Depth of Mica
(3) Mica
S-98
DIESEL ENGINE
D1503-M
D1703-M
V2003-M
V2203-M
30.0 mm
D1803-M-DI
1.18 in.
D1703-M-BG
V2003-M-BG
V2003-M-T-BG
V2203-M-BG
D1803-M
V2403-M
V2403-M-T 35.0 mm
V2403-M-DI 1.38 in.
V2403-M-DI-T
V2403-M-BG
D1503-M
D1703-M
V2003-M
V2203-M
29.0 mm
D1803-M-DI
1.14 in.
D1703-M-BG
V2003-M-BG
V2003-M-T-BG
V2203-M-BG
D1803-M
V2403-M
V2403-M-T 34.0 mm
V2403-M-DI 1.34 in.
V2403-M-DI-T
V2403-M-BG
Less than 0.02 mm
0.0008 in.
0.05 mm
0.002 in.
(a) Correct
(b) Incorrect
W1112444
KiSC issued 07, 2008 A