Polaris 850 PRO-RMK 155 2.6" QD 2021, Manual

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9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
QUICKDRIVE BACKER PLATE
REMOVAL
NOTICE
The backer plate is a structural component of the
chassis and bonded with adhesive to the tunnel.
Heating the backer plate with a torch is required for
removal.
CAUTION
Keep flame away from flammable materials. Use
propane torch in well-ventilated area.Only apply heat to
area that requires adhesive bond separation. Do not
apply heat to areas of adhesive where bond line
separation is not needed. Doing so will require
removing the part, removing adhesive, and then re-
applying new adhesive.
1. Follow the procedure for drive belt / sprocket removal.
2. Follow the procedures for removing the track, rear
suspension, and driveshaft.
3. Remove the brake caliper from the backer plate.
Secure caliper to over structure. Remove brake disc
from jackshaft.
4. Remove speed sensor from backer plate.
5. Remove the fasteners securing the backer plate to
the tunnel, front cooler / closeoff panel, and side
support.
6. While wearing protective gloves and clothing, use a
propane torch to evenly heat the backside and
fastener points of the chaincase/tunnel.
7. While applying heat, carefully and slowly pull the
backer plate away from the tunnel. Use extreme care
as to not distort the tunnel.
8. Allow the backer plate to properly cool.
9. Verify bearings roll smoothly. Replace if they do not or
if excessive play is evident. Use an arbor press to
remove and install bearings.
10. Thoroughly clean the chaincase-to-tunnel mating
surfaces. All residual bonding adhesive MUST be
removed. Use a putty knife and wire brush to remove
material.
11. After removing residual adhesive, wash parts in
solution of warm, soapy water and allow to air dry.
FINAL DRIVE / BRAKE SYSTEMS