1970-1979 Ski-Doo Snowmobiles Service Manual, Page 152Get this manual
REAR SUSPENSION AND TRACK
2Loosen spring adjuster bolt and track tension adjuster bolt to loosen track tension (Figure 3)
NOTE: When removing second bolt from cross shaft, wedge screwdriver blade between shaft and support to prevent cross shaft from turning
Remove bogie wheel set4Remove front and rear bogie wheel setsNOTE: Springs on bogie wheel assemblies may vary depending on installation locationMark the location of each bogie wheel set to make sure each set is installed in the proper location