Checking Rotor Of Alternator; Checking Slip Ring Of Alternator - Kubota D1803-CR-E4 Workshop Manual

SERVICING
7. Servicing
1. Measure the resistance across each lead of the
stator coil with the resistance range of circuit tester.
NOTE
• If electricity is out of service specification,
replace the stator assembly.
Service specifi-
Resistance
cation
2. Check the continuity across each stator coil lead
and core with the resistance range of circuit tester.
NOTE
• If it does not show infinity, replace the stator
assembly.
Service specifi-
Resistance
cation

7.51 Checking rotor of alternator

Tools required
• Circuit tester
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
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
Less than 1.0 Ω
Infinity
2.9 Ω
Infinity

7.52 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.
Service specifi-
cation
Slip ring O.D.
Service limit
4. ENGINE
14.4 mm
0.567 in.
14.0 mm
0.551 in.
4-189
KiSC issued 12, 2018 A