Armature Test; Starter Reassembly; Voltage Drop Test - Polaris RANGER RZR 170 Service Manual

Armature Test

1. Inspect surface of
excessively worn or damaged.
2. Using a digital multi-tester, measure the resistance
between each of the commutator segments. The
reading should be .3 ohms or less.
3. Measure the resistance between each commutator
segment and the armature shaft. The reading should
be infinite. (no continuity)
4. Check commutator bars for discoloration. Bars
discolored in pairs indicate shorted coils, requiring
replacement of the starter motor.
5. Place armature in a growler. Turn growler on and
position a hacksaw blade or feeler gauge lengthwise
²
1/8 (.3 cm) above armature coil laminates. Rotate
armature 360°. If hacksaw blade is drawn to armature
on any pole, the armature is shorted and must be
replaced.
commutator. Replace
9923983 - 2012-2013 RZR 170 Service Manual
© Copyright 2012 Polaris Sales Inc.
6. Inspect the permanent magnets in starter housing.
Make sure they are not cracked or separated from
if
housing.
Use care when handling the starter housing.
Do not drop or strike the housing, as magnet
damage is possible. If the magnets are damaged,
the starter must be replaced.

Starter Reassembly

1. Place armature in field magnet casing.
2. Inspect and replace the O-rings if damaged.
3. Install case sealing O-ring. Make sure O-ring is in
good condition and not twisted on the case. Lubricate
the ends of the armature shaft and oil seal with a light
film of grease, and install housing.
4. Install brush housing onto the armature, pushing back
brushes while installing armature shaft.
5. Reinstall starter motor housing screws and washers.
Make sure O-rings are in good condition and seated
in groove. Tighten sufficiently.
6. Reinstall the starter motor to the engine.

Voltage Drop Test

The Voltage Drop Test is used to test for bad connections.
When performing the test, you are testing the amount of
voltage drop through the connection. A poor or corroded
connection will appear as a high voltage reading.
To perform the test, place the meter on DC volts and place
the meter leads across the connection to be tested. Refer
to the chart on next page to perform voltage drop tests on
the starter system.
Voltage should not exceed
.1 DC volts per connection
ELECTRICAL
CAUTION
8
8.19