Page 229 - Manual Oficina XP 1000 14-16

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PVT SYSTEM

PVT SYSTEM OVERVIEW

GENERAL OPERATION DRIVE CLUTCH OPERATION
Drive clutches primarily sense engine RPM. The two
WARNING major components which control its shifting function are
the shift weights and the coil spring. Whenever engine
All PVT maintenance or repairs should be performed by
a certified Polaris Master Service Dealer (MSD) RPM is increased, centrifugal force is created, causing
technician who has received the proper training and the shift weights to push against rollers on the moveable
understands the procedures outlined in this manual. sheave, which is held open by coil spring preload. When
this force becomes higher than the preload in the spring,
Because of the critical nature and precision the outer sheave moves inward and contacts the drive
balance incorporated into the PVT components, it is belt. This motion pinches the drive belt between the
absolutely essential that no disassembly or repair spinning sheaves and causes it to rotate, which in turn
be made without factory authorized special tools rotates the driven clutch.
and service procedures.
At lower RPM, the drive belt rotates low in the drive
The Polaris Variable Transmission (PVT) consists of clutch sheaves. As engine RPM increases, centrifugal
three major assemblies: force causes the drive belt to be forced upward on drive
clutch sheaves.
1) The Drive Clutch
2) The Driven Clutch 5
3) The Drive Belt
The internal components of the drive clutch and driven
clutch control engagement (initial vehicle movement),
clutch upshift and backshift. During the development of
the Polaris vehicle, the PVTsystem is matched first to the
engine power curve; then to average riding conditions
and the vehicle’s intended usage. Therefore,
modifications or variations of components at random are
never recommended. Proper clutch setup and careful
inspection of existing components must be the primary
objective when troubleshooting and tuning.

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