1972 Ski-Doo Shop Manual, Page 76Get this manual
1-12-06 8Pour ounces of Ski-Doo chain case oil into chain caseI nstall inspection cover
CHAIN CASE
7Remove four (4) bolts securing chain case to frameRemove aligning shims, if installed
9Connect brake cable and housing to brake lever and chain caseConnect brake lever springProceed with brake adjustmentNOTE: Brake lever spring is not installed on Elan models10Using link plate spring lever apply track tension by hooking link plate springs in spring anchors11Install drive belt and pulley guard
Using two (2) large screwdrivers inserted between chain case and frame, pry the complete assembly from vehicle (fig1-12-13)On 15 inch track TNT models, remove spacer located be tween frame and chain case8
REMOVAL (NORDIC 440 AND ALL T'NT MODELS) 1Remove pulley guard and drive belt2Using link plate spring lever, release track tension by unhooking link plate springs3With seal lever, pry oil seal from chain case (see fig1-12-02)4Unbolt brake assembly from chain case and remove spring5Unbolt chain case cover and remove cover and "0" ringNOTE: Position catch pan beneath chain case before unbolting chain case cover6Insert chain tension releaser tool and remove cotter pin locking lower sprocketRemove spacer (fig1-12-12)DISASSEMBLY 1Remove drive chain and lower sprocket