Kubota D1803-CR-E4 - Checking Rotor of Alternator; Checking Slip Ring of Alternator

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.
Resistance
Service specifi-
cation
Less than 1.0 Ω
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.
Resistance
Service specifi-
cation
Infinity
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-
tween slip rings
Service specifi-
cation
2.9 Ω
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-
tween slip ring and
rotor core
Service specifi-
cation
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.
Slip ring O.D.
Service specifi-
cation
14.4 mm
0.567 in.
Service limit
14.0 mm
0.551 in.
SERVICING
7. Servicing 4. ENGINE
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
4-189
KiSC issued 12, 2018 A