2001 Ski-Doo Factory Shop Manual Volume One, Page 156Get this manual
Section 04 ENGINE Subsection 07 (AXIAL FAN COOLING SYSTEM)
Reassembly
Install fan belt on bottom pulley first then position onto fan shaft, as shown in the next photo1 2
A03C2AA
FAN BELT PROPERLY INSTALLED ON BOTTOM PULLEY AND FAN SHAFT 1Bottom pulley 2Fan shaft 3Starting pulley
Reinstall fan assembly on fan shaftTemporarily tighten fan nutCAUTION: When reinstalling fan assembly, ensure that key is properly positioned into fan shaft keyway