1970-1979 Ski-Doo Snowmobiles Service Manual, Page 86Get this manual
Quality of the image is intentionally reduced!
::"" Lockwasher
13 Rotary valve shaft 14 Bearing 15 Shim (0.5mm) 16 Loctite 271
17 Distance sleeve (24.5mm) 18 Shim (0.5mm) 19O-ring 20 Gear 21 Spring 22 Spring retaining cup