Yamaha F225F Service Manual page 521

Motor brush standard length a:
11.5 mm (0.45 in)
Wear limit b: 4.5 mm (0.18 in)
2. Check the motor base assembly for
continuity. Replace
continuity.
f
e
Sb
Lg
Sb: Sky blue
Lg: Light green
Motor base assembly continuity:
Terminal c–Terminal e
Terminal c–Terminal g
Terminal e–Terminal g
Terminal d–Terminal f
Terminal d–Terminal h
Terminal f–Terminal h
3. Check the motor
Replace the motor base assembly if the
base is cracked or damaged.
Assembling the PTT motor
• Do not reuse a bearing, oil seal, or O-
ring, always replace it with a new one.
• Do not apply grease or oil to the commu-
tator of the armature.
b
a
if there is no
g
h
c
d
base assembly.
1. Install a new oil seal a.
2. Install the brushes b and springs c.
b
c
c
b
b
c
3. Install a new bearing d to the specified
depth.
d
Depth a (reference data):
20.10 mm (0.79 in)
4. Install a new bearing e to the specified
depth b.
PTT motor
a
b
b
c
c
a
d
9-42
0
1
2
3
4
5
6
7
8
9
10
A