Arctic Cat Sno Pro 120 Service Manual page 251

12. Inspect the ground brushes to make sure they are
properly grounded. Use a multimeter and the follow-
ing procedure.
A. Set the selector to the OHMS position.
B. Touch the black tester lead to a ground brush.
C. Touch the red tester lead to the brush holder
assembly.
 NOTE: If no resistance is indicated, check the
ground connection for tightness and for cleanliness.
If there is still no meter indication, replace the brush
assembly.
ASSEMBLING
1. With the brush assembly secured in a vise, compress
each brush all the way into the housing; then care-
fully push the brush wire over and down to secure
the brush in the fully compressed position.
 NOTE: The brushes must be fully compressed to
allow enough room to install the armature.
2. Install the armature into the brush assembly; then
using a small needle-nose pliers, carefully move the
brush wires upward allowing the brushes to fully
contact the commutator.
0725-653
 NOTE: After completing step 2, ensure that the
brushes are properly seated to the commutator.
3. Noting the alignment marks made in disassembling,
install the magnet housing; then with the magnet
housing properly seated to the brush assembly,
install the snap ring, shim, and locking plate to the
armature shaft.
 NOTE: If alignment marks were not made during
disassembling, align properly by matching notch on
the magnet housing to notch on the brush assembly.
4. With a suitable driving tool, install new seal into the
bearing housing; then install the bearing housing.
 NOTE: Prior to installing the bearing housing, posi-
tion the locking plate with the tabs (A) of the locking
plate aligned with the cap screw ears (B) of the
starter motor.
ZJ143
ZJ145
5
ZJ153A
ZJ144A
5-17