Drive Belt; Drive Belt Specifications - Polaris 850 PRO-RMK 155 2020 Manual

DRIVE BELT

DRIVE BELT SPECIFICATIONS

850
Part Number
Projected Width
(in/cm)
Overall Side Angle
Center to Center
(in/cm)
Outer Circumference
(in/cm)
Ride Out
Notes
Belt dimensions are given in nominal dimensions. There
is a +/- variance for all critical dimensions. Clutch set up
must be inspected when a new belt is installed.
The drive belt is an important component of the converter
system. In order to achieve maximum efficiency from the
converter, drive belt tension (deflection), clutch offset,
and alignment must be adjusted properly.
The belt cord line should be flush with, or slightly above,
the outer circumference of the driven clutch sheaves.
The belt will seat itself in the driven clutch during the
break-in period. Adjust the belt ride out after the break-in
period by re-adjusting belt deflection.
The break-in period for a new drive belt is 30 - 50 miles.
During this time, vary the throttle position under 50% and
limit full throttle use.
Always take time to warm up the belt and driveline prior
to operating the snowmobile. Free track and skis from
the ground before engaging throttle.
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
3211216
1.47 / 3.73
28°
11.50 / 29.21
46.77 / 118.8
Belt cord line should be
flush with, or slightly
above, the outer
circumference of driven
clutch sheaves.
MBL Cut Finish / High
PBO
BELT INSPECTION
q
1. Measure the belt width
severely. Generally a belt should be replaced if the
clutches can no longer be adjusted to provide the
proper belt deflection.
• Project the side profiles and measure from corner to
corner.
• Place a straight edge on each side of the drive belt and
measure the distance where the straight edges
intersect at the top.
2. Inspect the belt for loose cords, missing cogs,
cracks, abrasions, thin spots or excessive wear
spots. Replace if necessary.
3. Inspect the belt for hour glassing (extreme circular
wear in at least one spot and on both sides of the
belt). Hour glassing occurs when the drive train does
not move and the drive clutch engages the belt.
PVT SYSTEM
and replace it if it is worn
7
7.9