Service Manual

S-74
SM-E2B SERIES, WSM
DIESEL ENGINE
Brush Wear
1. If the connect face of the brush is dirty or dusty, clean it with
emery paper.
2. Measure the brush length (A) with vernier caliper.
3. If the length is than the allowable limit, replace the yoke assembly
and brush holder.
W1156360
Brush Holder
1. Check the continuity across the brush holder and the holder
support with a circuit tester.
2. If it conducts, replace the brush holder.
W1156895
Armature Coil
1. Check the continuity across the commutator and armature coil
core with resistance range of circuit tester.
2. If it conducts, replace the armature.
3. Check the continuity across the segments of the commutator with
resistance range of circuit tester.
4. If it does not conduct, replace the armature.
W1156507
Brush length A
Factory
spec.
Electromagnetic
drive type
16.0 mm
0.630 in.
Planetary gear
reduction type
14.0 mm
0.551 in.
Allowable
limit
Electromagnetic
drive type
10.5 mm
0.413 in.
Planetary gear
reduction type
9.0 mm
0.354 in.
KiSC issued 06, 2006 A