1972 Ski-Doo Shop Manual, Page 71Get this manual
1-12-01 Transmission
CHAIN CASE
GENERAL
The chain case mechanism of the Ski-Doo snowmobile is connected to the driven pulley shaft and drive axleIncorporated within the case are upper and lower sprockets, drive chain and chain tensionersOil contained within the case lubricates the chain and lower componentsChain rotation acts as an oil conveyor to lubricate the upr sprocket and bearings
1Cheln c2Oil reuin.r ring 3sewing cup 4Searing cone