Checking The Starter Motor; Assembling The Starter Motor - Yamaha 2016 Grizzly yfm700gplg Service Manual

EBS30157

CHECKING THE STARTER MOTOR

1. Check:
• Commutator
Dirt → Clean with 600-grit sandpaper.
2. Measure:
• Mica undercut "a"
Out of specification → Cut 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.
3. Measure:
• Armature assembly resistances (commutator
and insulation)
Out of specification → Replace the starter
motor.
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a. Measure the armature assembly resistances
with the digital circuit tester.
Digital circuit tester
90890-03174
Model 88 Multimeter with ta-
chometer
YU-A1927
Armature coil
Commutator resistance "1"
0.0050–0.0150 Ω at 20 °C (68 °F)
Insulation resistance "2"
Above 1 MΩ at 20 °C (68 °F)
b. If any resistance is out of specification, re-
place the starter motor.
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2
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4. Measure:
• Brush length "a"
Out of specification → Replace the brush set.
a
5. Check:
• Gear teeth
Damage/wear → Replace the gear.
6. Check:
• Bearing
▼▼▼
• Oil seal
Damage/wear → Replace the defective
part(s).
EBS30158

ASSEMBLING THE STARTER MOTOR

1. Install:
• Starter motor yoke "1"
• Starter motor front cover "2"
• Starter motor rear cover "3"
TIP
Align the match marks "a" on the starter motor
yoke with the match marks "b" on the starter mo-
tor front and rear covers.
5-42
ELECTRIC STARTER
1
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Brush overall length limit
6.50 mm (0.26 in)
Starter motor cover bolt
5 Nm (0.5 m·kgf, 3.6 ft·lbf)
M
▲ ▲▲▲ ▲ ▲▲▲
a