1986 Ski-Doo Factory Shop Manual, Page 324Get this manual
Section 03 TRANSMISSION Sub-section 07 (CHAINCASE)
Chaincasedriven pulley assembly
Using two (2) large screwdrivers inserted between chaincase and frame, pry complete assembly from vehicle
12, Oil seal
Using an appropriate pusher, press new oil seal into chaincase hubOil seal must sit flush with case hub edge
14, Sprocket
Place lower sprocket with longer flange toward track side of chaincase(For proper sprocket and chain use, see Technical Data
Longer flange toward track side
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INSTALLATION
To install chaincase driven pulley assembly, reverse removal procedure paying specIal attention to the following
DISASSEMBLY
Disassemble driven pulley from chaincaseReter to Driven pulley section 03-04,
20,16, Cotter pins
Install
cotter pins
INSPECTION
Visually inspect chain for clacked, damaged or missing link rollersCheck lor defective bearing cones, bearing cups and oil deflector, Inspect sprockets and chain tensioner assemblv fOf wear