Yamaha F50D Servise Manual page 314

BRKT
4. Check the circuit breaker for continuity.
Replace if there are no continuity.
5. Check the PTT motor base. Replace if
there are cracks or damage.
Checking the brush
1. Measure the length of each brush.
Replace the brush assembly or brush
holder assembly if below specification.
Brush length wear limit a:
3.5 mm (0.14 in)
Assembling the PTT motor
9 Do not reuse the oil seal and O-rings,
always replace them with new ones.
9
Do not allow grease or oil to contact the
commutator of the armature.
1. Install a new oil seal 1 and bushing 2
into the motor base 3.
9-35
Bracket unit
a
2. Install the circuit breaker 4 onto brush 1
5 together with the brush holder 6 and
connect the wire lead 7.
7
4
3. Install the springs 8, brush holder 9,
and brush 2 0 into the motor base.
4. Install the washer q, armature w, a new
O-ring e, and yoke r.
0
9
8
8
2
3
1
5
6
r
e
w
q