6 - 14
–
+
ELEC
ELECTRIC STARTING SYSTEM
INSPECTION AND REPAIR
1. Check:
●
Commutator
Dirt
→
Clean with 600 grit sandpaper.
2. Measure:
●
Commutator diameter
a
Out of specification
→
Replace the
starter motor.
3. Measure:
●
Mica undercut
a
Out of specification
→
Scrape the mica
to the proper measurement with a hack-
saw blade which has been grounded to
fit the commutator.
NOTE:
The mica must be undercut to ensure proper
operation of the commutator.
Min. commutator diameter
16.6 mm (0.65 in)
Mica undercut
1.5 mm (0.06 in)
4. Measure:
●
Armature assembly resistances (com-
mutator and insulation)
Out of specification
→
Replace the
starter motor.
●
Measure the armature assembly resis-
tances with the pocket tester.
Pocket tester
YU-03112-C/90890-03112
Armature assembly
Commutator resistance
1
0.0117 ~ 0.0143
Ω
at 20 ˚C
(68 ˚F)
Insulation resistance
2
Above 1 M
Ω
at 20˚C (68 ˚F)
●
If any resistance is out of specification,
replace the starter motor.
Содержание WR450F(S)
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