Troubleshooting Drive Clutch/Driven Pulley; Midrange Shift-Up; Excessive Belt Deposits; Driven Pulley Vibrates - Arctic Cat Sno Pro 120 Service Manual

Troubleshooting Drive
Clutch/Driven Pulley
Problem: Midrange Shift-Up (Too Quickly - Lowers RPM)
Condition
1. Drive clutch spring weak
2. Driven pulley spring weak
3. Driven pulley spring preload tension inadequate
4. Center-to-center distance too close
5. Driven pulley bearing worn — damaged
Problem: Midrange Shift-Up (Too Slowly - Raises RPM)
Condition
1. Drive clutch components dirty
2. Driven pulley components dirty
3. Driven pulley spring preload tension excessive
4. Driven pulley bearing worn — dirty
Problem: Excessive Belt Deposits
Condition
1. Offset/parallelism incorrect
2. Drive clutch/driven pulley sheaves rough — damaged
— dirty
3. Driven pulley movable sheave travel impaired
4. Driven pulley bearing worn — dirty
Problem: Excessive Belt Drag—Impaired Drive Clutch Disengagement
Condition
1. Drive clutch components dirty — damaged
2. Drive belt does not meet measurement specifications
Problem: Engine RPM Suddenly Increases—Drive Clutch Vibrates
Condition
1. Cam arm pin bent — damaged
2. Cam arm damaged — broken
3. Drive clutch out of balance
Problem: Driven Pulley Vibrates
Condition
1. Driven pulley out of balance
Problem: Drive Clutch Engagement (Before Specified RPM)
Condition
1. Drive clutch spring weak — bent
2. Cam arms incorrect — worn
Problem: Drive Clutch Engagement (After Specified RPM)
Condition
1. Drive clutch spring incorrect
2. Spider buttons worn
Problem: Drive Clutch Sticks
Condition
1. Drive clutch components dirty
2. Movable sheave bent — binding
3. Spider buttons worn
Problem: Drive Clutch Jerks—Shifts Erratically
Condition
1. Drive clutch dirty
2. Rollers worn
3. Cam arms rough
4. Spider buttons worn
5. Sheaves dirty
6-58
Remedy
1. Replace drive clutch spring
2. Replace driven pulley spring
3. Replace driven pulley spring
4. Adjust center-to-center distance
5. Replace bearing — movable sheave
Remedy
1. Clean drive clutch components
2. Clean driven pulley components
3. Replace driven pulley spring
4. Clean — replace bearing — movable sheave
Remedy
1. Adjust offset/parallelism
2. Repair — replace — clean drive clutch/driven pulley
3. Service driven pulley
4. Clean — replace bearing — movable sheave
Remedy
1. Clean — replace drive clutch components
2. Replace drive belt
Remedy
1. Replace pin
2. Replace cam arm
3. Align — replace components — drive clutch — drive belt
Remedy
1. Service — replace driven pulley
Remedy
1. Replace spring
2. Replace cam arms
Remedy
1. Replace spring
2. Replace clutch
Remedy
1. Clean drive clutch components
2. Clean — replace movable sheave
3. Replace clutch
Remedy
1. Clean — drive clutch components
2. Replace clutch
3. Polish — replace cam arms
4. Replace clutch
5. Clean sheaves