Checking The Armature - Yamaha F50D Servise Manual

2
4
3
5
6
1
TIP:
The number of the parts of the washer set 4
and each thickness vary depending on the
part.
2. Remove the screws 7, and then remove
the brush holder assembly 8 from the
bracket 9.
7

Checking the armature

1. Check the commutator. Clean with 600
grit sandpaper and compressed air if
dirty.
2. Measure the commutator diameter a.
1
Digital caliper 1: 90890-06704
Standard diameter a: 33.0 mm (1.30 in)
Wear limit: 32.0 mm (1.26 in)
3. Measure the commutator undercut b.
8
9
Standard undercut b:
Wear limit: 0.2 mm (0.01 in)
Replace if below specification.
1
a
Replace if below specification.
0.5–0.8 mm (0.02–0.03 in)
Starter motor
0
1
2
3
4
5
6
7
b
8
9
10
A
5-26