2001 Polaris Sportsman 400-500 DUSE and H.O. Service Manual, Page 187Get this manual
PVT MAINTENANCEINSPECTION
Under normal operation the PVT system will provide years of trouble free operationPeriodic inspection and maintenance is required to keep the system operating at peak performanceThe following list of items should be inspected and maintained to ensure maximum performance and service life of PVT componentsRefer to the troubleshooting checklist at the end of this chapter for more information1Belt Tension, Drive to Driven Clutch Offset, Belt WidthSee pages 6.18-6.212Drive and Driven Clutch Buttons and Bushings, Drive Clutch Shift Weights and Pins, Drive Clutch Spider Rollers and Roller Pins, Drive and Driven Clutch SpringsSee pages 6.10-6.123Sheave FacesClean and inspect for wear4PVT System SealingRefer to appropriate illustration below and on the following pagesThe PVT system is air cooled by fins on the drive clutch stationary sheaveThe fins create low pressure area in the crankcase casting, drawing air into the system through an intake ductThe opening for this intake duct is located at high point on the vehicle (location varies by model)The intake duct draws fresh air through vented coverAll connecting air ducts (as well as the inner and outer covers) must be properly sealed to ensure clean air is being used for cooling the PVT system and also to prevent water and other contaminants from entering the PVT areaThis is especially critical on units subjected to frequent water forging