1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 203Get this manual
PVT SYSTEM Maintenance PVT MaintenanceInspection
Under normal operation the PVT system will provide years oftrouble 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 components1Belt Tension, Drive to Driven Clutch Offset, Belt WidthTo ensure proper performance these items must be periodically inspected and maintained2Drive and Driven Clutch Buttons and Bushings, Drive Clutch Shift Weights and Pins, Drive Clutch Spider Rollers and Roller Pins, Drive and Driven Clutch SpringsThese items must be periodically inspected for wear and replaced if necessaryPVT System SealingThe 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 beneath the fuel tank of the ATVIt draws fresh air through vented coverThe connecting air ducts from the crankcase upward must be properly sealed to ensure clean air is being used for cooling the PVT systemThe system must also be sealed well enough to keep out water, particularly on units subjected to frequent water forgingIf water is ingested, shift transmission to neutral and rev engine slightly to expel the moisture and air dry the belt and clutchesAllow engine RPM to settle to idle speed, shift transmission to low range and test for slippageOperate ATV in low range for short period of time until PVT system is dryAlso, during routine maintenance or whenever PVT system overheating is noticed, it's important to check the inlet ducting and the outlet ducting for obstructionsObstructions in the ducting will significantly increase the PVT system operating temperaturesTypical PVT Sealing and Ducting Components