Polaris 2005 SPORTSMAN 500 Servise Manual page 299

4. Remove shims from armature shaft. NOTE: All
shims must be replaced during reassembly.
BRUSH
INSPECTION/REPLACEMENT
Brush Set
1. Using a digital multitester,
resistance between the cable terminal and the
insulated brush. The reading should be .3 ohms
or less. Measure the resistance between the
cable terminal and brush housing. Make sure the
brush is not touching the case. The reading
should be infinite.
2. Remove nut, flat washer, large phenolic washer,
two small phenolic washers, and O-Ring from
brush terminal. Inspect the O-Ring and replace if
damaged.
3. Remove brush plate and brushes.
length of brushes and replace if worn past the
service limit.
discolored or have inadequate tension.
4. Inspect surface of commutator for wear or
discoloration. See Steps 3-6 of armature testing
on Page 10.40.
5. Install a new carbon brush assembly in the brush
housing. NOTE: Be sure that the terminal bolt
insulating washer is properly seated in the
housing, and the tab on the brush plate engages
the notch in the brush plate housing.
6. Place a wrap of electrical tape on the threads of
the terminal bolt to prevent O-Ring damage
during reinstallation.
7. Install the O-Ring over the bolt. Make sure the
O-ring is fully seated.
measure the
8. Remove the electrical tape and reinstall the two
small phenolic washers, the large phenolic
washer, flat washer, and nut.
ELECTRICAL
Brush Length
5/16" (.8 cm)
Brush Length Service Limit:
5/16" (.8 cm)
Replace springs if they are
Measure
10.39