Checking The Ptt Motor; Checking The Brush - Yamaha F150B Service Manual

d
B
e

Checking the PTT motor

1. Check the commutator. Clean with 600
grit sandpaper and compressed air if dirty.
2. Measure the commutator diameter. Replace
the armature if below specification.
a
Motor commutator standard diameter a:
22.0 mm (0.87 in)
Wear limit: 21.0 mm (0.83 in)
3. Check the armature continuity. Replace if
out of specification.
f
e
b
c
Digital circuit tester: 90890-03174
Armature continuity:
b c

Checking the brush

1. Measure the length of each brush.
Replace the brushes if below specifica-
tion.
Motor brush standard length:
9.8 mm (0.39 in)
Wear limit a: 4.8 mm (0.19 in)
2. Check the brush and circuit breaker for
continuity. Replace
continuity. NOTICE: Do not touch the
bimetal b, otherwise the operation of
the circuit breaker can be affected.
PTT motor
e
d
d e
a
if there is no
10
b
9-42
0
1
2
3
4
5
6
7
8
9
A