1972 Ski-Doo Shop Manual, Page 12Get this manual
1-01-01 Suspension
BOGIE WHEEL SYSTEM 1-1
GENERAL
The Ski-Doo snowmobile's ability to negotiate any snow covered terrain and to handls waif at all speeds is the direct result of an espacially designed bogie wheel systemCorrect lubrica tion, maintenance, repair and overhaul proce dure of this system will ensure smoother opera tion of the vehicle
1 Cross Shaft Suspension Spring Wheel Support Inner Flange Wheel Tire Bearing (Wheel)