6.16
9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc.
CHAINCASE COVER SERVICE
If oil leaks are found at the jackshaft bearing location on
the chaincase, the seal and bearing should be inspected
and serviced accordingly.
1. With the chaincase cover removed and placed on a
workbench, use a pick to pry the oil seal
q
out of the
chaincase cover
e
.
2. Press the bearing
w
out using an Arbor press or
similar tool. Always press on the bearing’s outer race
during removal and installation.
3. Inspect the bearing by feel. Replace if bearing feels
rough or freewheels.
4. Install a new bearing into the cover using an Arbor
press or similar tool. Press only on the bearing’s outer
race.
5. Install a new oil seal into the front of the cover. Apply
a light film of oil to the seal lips to aid installation.
Press only on the outer circumference of the seal.
Note that the oil seal spring lip faces in. Press seal
into bore until flush with the outer edge of the
chaincase.
CHAINCASE ASSEMBLY
1. Thoroughly clean the chaincase, sprockets, and
chain.
2. Inspect the tensioner pad for damage. Replace if
excessive wear is evident.
3. Install the lower sprocket
j
, chain
h
, and upper
sprocket
g
as an assembly.
4. Install the jackshaft spacer
f
.
FINAL DRIVE / BRAKE SYSTEMS
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