Clutch Maintenance; Pvt Maintenance/Inspection; Pvt Overheating; Pvt Sealing And Ducting Components - Type I - Polaris Magnum 2x4 Service Manual

PVT Maintenance/Inspection
CLUTCHES
Maintenance
Under normal operation the PVT system will provide years of trouble free operation. Periodic inspection and main-
tenance is required to k8ep the system operating at peak performance. The following list of items should be in-
spected and maintained to ensure maximum performance and service life of PVT components. Refer to the trou-
bleshooting checklist at the end of this chapter for more information.
1.
Belt Tension, Drive to Driven Clutch Offset, Belt Width. See pages 6.12-6.13.
2. Drive and Driven Clutch Buttons and Bushings, Drive Clutch Shift Weights and Pins, Drive Clutch
Spider Rollers and Roller Pins, Drive and Driven Clutch Springs. See pages 6.14-6.22.
3.
Sheave Faces. Clean and inspect for wear.
4.
PVT System Sealing. Refer to appropriate illustration below and on the following pages. The PVT system is
air cooled by fins on the drive clutch stationary sheave. The fins create a low pressure area in the crankcase
casting, drawing air into the system through an intake duct. The opening for this intake duct is located at a high
point on the vehicle (location varies by model). The intake duct draws fresh air through a vented cover. All
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 area. This is especially critical on units subjected to frequent water forging.
PVT Drying
If water is ingested, shift transmission to neutral and rev engine slightly to expel the moisture and air-dry the
belt and clutches. Allow engine RPM to settle to idle speed, shift transmission to low range and test for belt
slippage. Operate ATV in low range for a short period of time until PVT system is dry.
PVT Overheating
During routine maintenance or whenever PVT system overheating is evident, it's important to check the inlet
and outlet ducting for obstructions. Obstructions to air flow through the ducts will significantly increase PVT
system operating temperatures. The ATV should be operated in LOW RANGE when pulling or plowing heavy
loads, or if extended low speed operation is anticipated.
PVT Sealing and Ducting Components
Type I
Typical of Gen II and Gen IV
Liquid Cooled 2-Strokes
Polaris Industries Inc.
Inner Cover
Seal
6.7
5/98