1974 Ski-Doo Shop Manual, Page 9Get this manual
INSTALLATION
If the drive axle to be installed is new component and the vehicle is equipped with speedometer, speedometer drive in sert must be installed into the axle endEnsu re that inse rt is flush with end of axle Install end bearing housingFor vehicles equipped with speedometer, install coupling cable and angle drive unitIf applicable, install chaincase assemblyPlace shim on chaincase side of axle and secure with new cotter pin(Not applicable on models equipped with gearbox)On electric models, if applicable, install seat, battery and coverInstall oil seal making sure that gap of approximately 116" exists between end of bearing housing and each oil seal
To remove center idler wheel tire, apply liquid soap or petroleum jelly on idler bead and flange then with two screwdrivers (round bars), pass the idler wheel tire over flangeReverse changeover procedure to install idler wheel tire