Yamaha F40B - Checking the Brush Holder and Brush; Assembling the PTT Motor

BRKT
Bracket unit
7-37 67C3K11
Checking the brush holder and
brush
1. Check the brush holder assembly for
continuity. Replace the PTT motor base if
out of specification.
NOTE:
The brush holder and circuit breaker cannot
be removed from the PTT motor base; if
either part is damaged, replace the PTT
motor base.
2. Measure the length of each brush.
Replace the brushes if below specifica-
tion.
Assembling the PTT motor
CAUTION:
• Do not reuse the oil seal and O-rings,
always replace them with new ones.
• Do not allow grease or oil to contact the
commutator of the armature.
1. Install a new oil seal into the PTT motor
base as shown.
2. Install the brush springs 3, brush (short
lead) 4, brush (long lead) 5, and brush
holder screws 6 to the PTT motor base
7 as shown.
PTT motor base continuity
Checking point Continuity
Terminal 1 – 3 (L)
Terminal 2 – 4 (G)
Yes
For all terminal combinations
not listed above.
No
S67C7069
1
21
2
3
4
L
G
G
4
3
L
Motor brush standard length:
6.0 mm (0.24 in)
Wear limit a: 3.0 mm (0.12 in)
Driver rod L3 1: 90890-06652
Needle bearing attachment 2:
90890-06615
Brush lead length: a > b
S67C7071
2
1
S67C7072
54
3
3
6
7
6
ab