Yamaha CW50L Service Manual page 90

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REMOVAL _ 5. Measure: J
@/_ 1. Inspect: - Brush length @
• Commutator Out of specification --, Replace.
Dirty _ Clean it with #600 grit sandpaper.
2. Measure: Brush length limit @:
• Commutator diameter @ 5.30 mm (0.21 in)
Out of specification _ Replace starter motor
_ Commutator wear limit: I
15.0 mm (0.60 in)
3. Measure: 6. Measure:
• Mica under cut @ • Brush spring force
Out of specification _ To scrape the mica to Fatigue/out of specification _ Replace as a
@ proper measurement use a hacksaw blade set.
which has been grounded to fit the commu-
tator, _ Brush spring force:
150 ~ 650 gr (5.29 ~ 22.92 oz)
_ Micaundercut@: I
1.15 mm (0.045 in)
NOTE: 7. Inspect:
The mica insulation of the commutator must be • Bearing
undercut to ensure proper operation of Roughness--* Replace.
commutator. • O-rings
Wear/damage _ Replace.
4. Inspect:
• Armature coil (resistance)
._ii_; Defect --, Replace starter motor
_; *****************************************************
Inspecting steps:
Connect the pocket tester to perform the
continuity check.
• Measure the armature resistance.
I
0.072 _ at 20°C
• If the resistance is incorrect, replace the
starter motor.
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