Polaris Sprotsman 700, Safety And Maintenance Manual

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MAINTENANCE AND LUBRICATION
PVT System
On Polaris ATVs, the approximate gear ratio difference between high
and low range is 1:2.25. This difference in gearing affects the operation
of the PVT, especially at speeds less than 7 MPH, due to the system’s
dependence on engine speed.
For example, when operating at a ground speed of 3 MPH in low
range, the engine speed would be around 3000 RPM. This is well
above the engagement speed of 1200 - 1400 RPM. However, in high
range at 3 MPH, the engine would be running at only 1500 RPM.
Whenever operating this close to the engagement speed, the engine
may be running at a speed which is too low to provide adequate
“pinch” needed to prevent belt slip. This belt slip is responsible for
creating the excessive heat that destroys belts and causes outer clutch
covers to fail.
By switching to low range while operating at low ground speeds, the
air temperature in the clutch cover is reduced by almost 160 degrees.
Reducing the temperature inside the clutch cover extends the life of the
PVT components (belt, cover, etc.).
NOTE; Models without a low range should avoid heavy pulling and
extended low-speed operation.
PVT Drying
There may be some instances when water is accidently ingested into
the PVT system. If this happens, use the following instructions to dry
it out before operating.
First remove the drain plug and allow the water to drain. Replace the
drain plug. Start the engine and shift the transmission into neutral.
Apply varying throttle for 10 to 15 seconds. This will expel the
moisture and air-dry the belt and clutches. Allow the engine RPM to
settle to idle speed and shift the transmission to the lowest available
range and test for belt slippage. If the belt slips, repeat the process.
Take the vehicle to your dealer for service as soon as possible.