Yamaha 55DEHD - Checking the Brush

ELEC
8-15
6885J11
Electrical systems
2. Measure the commutator diameter a.
Replace the armature if below specifica-
tion limit.
3. Measure the commutator undercut b.
Replace the armature if below specifica-
tion limit.
a
1
6F680175
Digital caliper 1:
90890-06704
4. Check the armature for continuity.
Replace the armature if it is not shown in
the chart below.
Checking the brush
1. Measure the brush length a. Replace
the brush assembly if below specification
limit.
Standard diameter a:
33.0 mm (1.30 in)
Wear limit:
31.0 mm (1.22 in)
69R80320
c
e
fd
Standard length a:
16.0 mm (0.63 in)
Wear limit:
12.0 mm (0.47 in)
Armature continuity:
cdef
Tester probe
Segment–Segment
Segment–
Armature core
Segment–
Armature shaft
6F680180
b
Standard undercut b:
0.8 mm (0.03 in)
Wear limit:
0.2 mm (0.01 in)
6885J11_08 07.10.1 9:02 Page 16