1985 Ski-Doo snowmobile Service Manual, Page 16Get this manual
Section 01 TOOLS Sub-section 02 (SERVICE TOOLS)
Rotary valve seal pusher 420 876 605
To install rotary valve shaft seal
462, 467, 532 and 537 engine types
AOOOOO2034
Polyamid ring pusher 420 276 930
To install polyamid ring in crankcase
247 engine
A000002035