2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 257Get this manual
CLUTCHING Troubleshooting, ContinuedSituation Probable Cause -Plugged air intake or outletRemedy -Clear obstruction
-Belt slippage due to water, oil, grease, etc rubbing -Inspect systemCleanrepair or replace as necessaryon coverSeal PVT system ductsPVT cover -Clutches or weight being applied to cover while in -Remove weightInform operatoroverheating (melting) operation-High vslow range-Instruct operator on guidelines for operation in proper driving range for different terrain as outlined in Owner's Safety and Maintenance Manual-Find leak and repair as necessary-Instruct operator on guidelines for operation in wet terrain as outlined in Owner's Safety and Maintenance Manual-Replace belt-Inspect and seal PVT system-Inspect and clean-Replace belt-Inspect and repair as necessary-Replace beltRefer to belt burnt troubleshooting and instruct operator-Inspect and repair clutches