Snowmobile Yamaha Phazer PZ50W, PZ50GTW, PZ50FXW, PZ50MW, PZ50VTW, PZ50MPW. Manual - part 76
8-16
–
+
ELEC
Inspection
1. Inspect:
• Commutator (outer surface)
Dirty
→ Clean with #600 grit sandpaper 1.
Hold the armature in a vise 2 and copper or
aluminium plate 3.
CAUTION:
Lightly grip the armature with a vise.
2. Measure:
• Commutator diameter
a
Measure the diameter
a of the commutator at
points where the brush comes in contact.
Out of specification
→ Replace the starter
motor.
Commutator diameter wear limit:
23.5 mm (0.93 in)
3. Measure:
• Mica undercut (insulation depth)
a
(between commutator segments)
Out of specification
→ Scrape mica 1 to
proper limits.
Use a hacksaw blade 2 that is ground to fit.
Mica undercut:
1.5 mm (0.06 in)
4. Measure:
• Armature coil resistance
(insulation/continuity)
Defect(s)
→ Replace the starter motor.
Inspecting steps:
• Connect the pocket tester for the continuity
check 1 and the insulation check 2.
• Measure the armature coil resistances.
• If the resistance is incorrect, replace the starter
motor.
Armature coil resistance:
Continuity check:
0.009 ~ 0.011
Ω at 20 °C (68 °F)
Insulation check:
More than 100 k
Ω at 20 °C (68 °F)