Starter - Kubota GL6000A-AU-B Workshop Manual

GL6000A-AU-B, GL6000D-AU-B,GL9000A-AU-B, GL9000D-AU-B, WSM

(7) Starter

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
specifica-
tion
Commutator O.D.
Allowable
limit
Factory
specifica-
tion
Difference of O.D.'s
Allowable
limit
Factory specification
Mica undercut
Allowable limit
(1) Segment
(2) Undercut
(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 specification
Brush length (A)
Allowable limit
(A) Brush Length
1-S59
Electromag-
28.0 mm
netic drive
1.10 in.
type
Planetary gear 30.0 mm
reduction type 1.18 in.
Electromag-
27.0 mm
netic drive
1.06 in.
type
Planetary gear 29.0 mm
reduction type 1.14 in.
Electromag- Less than
netic drive 0.05 mm
type 0.002 in.
Less than
Planetary gear
0.02 mm
reduction type
0.0008 in.
Electromag-
0.4 mm
netic drive
0.02 in.
type
Planetary gear 0.05 mm
reduction type 0.002 in.
0.50 to 0.80 mm
0.020 to 0.031 in.
0.20 mm
0.0079 in.
(a) Correct
(b) Incorrect
9Y1211607ENS0102US0
16.0 mm
0.630 in.
10.5 mm
0.413 in.
9Y1211607ENS0103US0
KiSC issued 06, 2016 A
ENGINE