1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 89Get this manual
LUBRICATION, MAINTENANCE AND TUNE-UP
9Install any shims not needed between the pulley halves for adjustment outside the pulleyThese shims may be required for later adjustmentRefer to CheckingAdjusting Fan Belt Tension10Install the flat washer, lockwasher and the pulley retaining nutTighten the nut to 25-40 N.m (18-29 ftlbNOTE Turn the pulleys while tightening the retaining nut to prevent pinching the belt between the pulley halves