Alternator - Kubota WSM 07-E3B Series Workshop Manual

07-E3B SERIES, WSM

(9) Alternator

Bearing
1. Check the bearing for smooth rotation.
2. If it does not rotate smoothly, replace it.
Stator
1. Measure the resistance across each lead of the stator coil with
resistance range of circuit tester.
2. If the measurement is not within factory specification, replace it.
3. Check the continuity across each stator coil lead and core with
resistance range of circuit tester.
4. If infinity is not indicated, replace it.
Resistance Factory spec.
Rotor
1. Measure the resistance across the slip rings with an ohmmeter.
2. If the resistance is not the factory specification, replace it.
3. Check the continuity across the slip and core with an ohmmeter.
4. If infinity is not indicated, replace it.
Resistance Factory spec.
Slip Ring
1. Check the slip ring for score.
2. If scored, correct with an sand paper or on a lathe.
3. Measure the O.D. of slip ring with vernier calipers.
4. If the measurement is less than the allowable limit, replace it.
Factory spec.
Slip ring O.D.
Allowable limit
Brush Wear
1. Measure the brush length (A) with vernier calipers.
2. If the measurement is less than allowable limit, replace it.
3. Make sure that the brush moves smoothly.
4. If the brush is defective, replace it.
Factory spec.
Brush length (A)
Allowable limit
(A) Brush Length
S-113
ENGINE
W1076281
Less than 1.0 
W1019964
2.8 to 3.3 
W1076422
22.7 mm
0.894 in.
22.1 mm
0.870 in.
W1076592
18.5 mm
0.728 in.
5.0 mm
0.20 in.
W1076714
KiSC issued 06, 2020 A