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
6.51 Checking slip ring of alternator
Tools required
• Emery paper (#500 to 600)
• V
ernier 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.
6.52 Checking brush wear of
alternator
Tools required
•
V
ernier caliper
1.
Measure the brush length (A) with a vernier
calipers.
NOTE
• If the measurement
is less than the service
limit, replace it.
Brush length (A)
Service specifi-
cation
10.0 mm
0.394 in.
Service limit
8.4 mm
0.33 in.
(A) Brush length
2. Make sure that the brush moves smoothly.
NOTE
• If the brush
is damaged and not smoothly,
replace it.
4. ENGINE
SERVICING
6. Servicing
05-E4B SERIES,05-E4BG SERIES