Arctic Cat 660 cc, Service Manual

Page: 139 / 396

5-6
AO286
6. Remove the commutator cap from the commutator
case.
AO287
7. Remove the pinion-stop nut from the armature
shaft taking note that the lip of the pinion stop nut
faces inward.
AO288
8. Remove the armature from the commutator case.
AO289
CLEANING AND INSPECTING
„
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
1. Thoroughly clean all components except the
armature and brushes in parts-cleaning solvent;
then dry with compressed air.
2. Inspect all threaded areas for damaged or stripped
threads.
3. Inspect the brush holder assembly and brushes for
damage or wear.
4. Inspect brush leads for cracks, wear, or fraying. If
any of these conditions exist, replace the brushes
as a set along with new brush springs.
5. Inspect the commutator cap bushing for wear.
6. Inspect the brass commutator end of the armature
for any burned spots or damage. If the commutator
is slightly burned or damaged, the armature must
be replaced. This is a molded commutator and no
attempt to turn it down in a lathe should be tried.
7. Inspect the commutator end of the armature for
buildup in the grooves. Buildup in the grooves
must be removed to prevent any chance of arcing
between individual sections. Carefully remove any
buildup using a thinly ground hacksaw blade. Do
not cut any deeper than the original groove which
can be seen by looking from the side.
! CAUTION
Do not wash the armature and brushes in any
kind of solvent. Use only compressed air and
clean dry cloth in cleaning these components.
! CAUTION
Do not use emery cloth to clean the commutator
as emery particles will become imbedded in the
brass commutator resulting in a short circuit.
Use only #00 grit sandpaper.