Electri Cstarter - Yamaha FZ09E Service Manual

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CHECKING THE STARTER MOTOR
1. Check:
• Commutator
Dirt
-t
Clean with
600
grit sandpaper.
2. Measure:
• Mica undercut "a"
Out of specification
-t
Scrape the mica to the
proper measurement with a hacksaw blade
that has been grounded to fit the commutator.
Mica undercut (depth)
0.70 mm (0.03 in)
TIP ~~~~~~~~~~~~~~~
The mica of the commutator must be undercut to
ensure proper operation of the commutator.
I
•
• •
•
3. Measure:
• Armature assembly resistances (commutator
and insulation)
Out of specification
-t
Replace the starter
motor.
TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT
a. Measure the armature assembly resistances
with the digital circuit tester.
Dig ital circuit tester
90890-03174
Model 88 Multimeter with tachom-
eter
YU-A1927
Armature coil res istance
0.0050- < >.0150
n
Insulation resistance
Above 1 Mn at 20 °C (68 °F)
b. If any resistance is out of specification, re-
place the starter motor.
ELECTRIC STARTER
2
'
,•.
:
~
1
1. Commutator resistance
2. Insulation resistance
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~
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••••••••••••••••••••••••••••••••
4.
Measure:
• Brush length "a"
Out of specification
-t
Replace the brush
holder set.
Brush overall length
12.0
mm
(0.47
in)
Limit
6.50 mm (0.26 in)
5.
Measure:
• Brush spring force
a
Out of specification
-t
Replace the brush
holder set.
5-37
Brush spring force
6.03-6.52 N (615-665
gf,
21.71 -23.47 oz)
6. Check:
• Gear teeth
Damage/wear
-t
Replace the starter motor.