Kubota WSM 05-E4B Series User Manual

3. Measure
the
commutator
O.D. with an external
micrometer at several points.
NOTE
• If the minimum
O.D. is less than the service
limit, replace the armature assembly.
• If the difference of the O.D.'s more than the
service limit, correct the commutator on a
lathe to the service specification.
Commutator
O.D.
Service speci-
fication
Electromag-
netic drive
type
28.0 mm
1.10 in.
Gear reduc-
tion type
30.0 mm
1.18 in.
Service limit
Electromag-
netic drive
type
27.0 mm
1.06 in.
Gear reduc-
tion type
29.0 mm
1.14 in.
Difference of
O.D.'s
Service speci-
fication
Electromag-
netic drive
type
Less than
0.05 mm
Less than
0.002 in.
Gear reduc-
tion type
Less than
0.02 mm
Less than
0.0008 in.
Service limit
Electromag-
netic drive
type
0.4 mm
0.02 in.
Gear reduc-
tion type
0.05 mm
0.002 in.
4. Measure the mica undercut.
NOTE
• If the undercut is less than the service limit,
correct it with a saw blade. Chamfer the
segment edges.
Mica undercut
Service specifi-
cation
0.50 to 0.80 mm
0.020 to 0.031 in.
Service limit
0.20 mm
0.0079 in.
(1) Segment
(2) Depth of mica
(3) Mica
(a) Good
(b) Bad
6.44 Checking brush wear of starter
Tools required
• Vernier caliper
•
Emery paper (#300 or above)
1. Measure the brush length (A) with a vernier caliper.
NOTE
• If the length
is less than the service limit,
replace the yoke assembly and brush holder
assembly.
Brush length (A)
Service specifi-
cation
16.0 mm
0.630 in.
Service limit
10.5 mm
0.413 in.
(A) Brush length
2. After
you replace the brush, put an emery paper
(#300 or
above) on the commutator and correct the
contact position.
SERVICING
6. Servicing 4. ENGINE
05-E4B SERIES,05-E4BG SERIES
4-75
KiSC issued 03, 2023 A

Kubota WSM 05-E4B Series Specifications

General

Brand	Kubota
Model	WSM 05-E4B Series
Category	Engine
Language	English