Checking Slip Ring Of Alternator; Checking Brush Wear Of Alternator - Kubota WSM 05-E4B Series Workshop Manual

4. ENGINE
1. Measure the resistance across the slip rings with
the resistance range of circuit tester.
NOTE
• If electricity is out of service specification,
replace the rotor.
Resistance be- Service specifi-
tween slip rings cation
2. Check the continuity across the slip ring and core
with the resistance range of circuit tester.
NOTE
• If electricity is out of service specification,
replace the rotor.
Resistance be-
Service specifi-
tween slip ring and
cation
rotor core

6.51 Checking slip ring of alternator

Tools required
• Emery paper (#500 to 600)
• Vernier caliper
1. Check the slip ring for dirt or scratch.
NOTE
• If dirt is detected, clean the slip ring using a
cloth soaked in alcohol.
• If there is slight score, correct with an emery
paper (#500 to 600).
2. Measure the O.D. of the slip ring with a vernier
calipers.
NOTE
• If the measurement is less than the service
limit, replace the rotor assembly.
4-78
2.9 Ω
Infinity
Service specifi-
cation
Slip ring O.D.
Service limit
6.52 Checking brush wear of
alternator
Tools required
• Vernier caliper
1. Measure the brush length (A) with a vernier
calipers.
NOTE
• If the measurement is less than the service
limit, replace it.
Service specifi-
cation
Brush length (A)
Service limit
(A) Brush length
2. Make sure that the brush moves smoothly.
NOTE
• If the brush is damaged and not smoothly,
replace it.
SERVICING
6. Servicing
14.4 mm
0.567 in.
14.0 mm
0.551 in.
10.0 mm
0.394 in.
8.4 mm
0.33 in.
05-E4B SERIES,05-E4BG SERIES
KiSC issued 03, 2023 A