Cvt System - Craftsman 108.27807 Operator's Manual

• Always attach a tow load to the hitch point designated for your ATV.
• The vehicle should never exceed 10 mph (16km/h) while towing a load on a
level grass surface. Vehicle speed should never exceed 5 mph (8km/h) when
towing loads in rough terrain, while cornering, or while ascending or
descending a hill.
• Use of low forward gear is recommended in heavy pulling situations to extend
belt life.

14. CVT System

WARNING
The CVT (Continuously Variable Transmission) system rotates at high speeds,
creating large amounts of force on clutch components. However, as the owner,
you have the following responsibilities to make sure this system remains safe:
• Do not modify any component of the CVT system. Doing so may reduce its
strength so that a failure may occur at high speeds. Any modification will cause
the system to be out of balance, creating vibration and additional loads on
components.
• If you experience any problems with the CVT, contact 1-800-643-7332 for the
name of an authorized service center.
• The CVT housing must be securely in place during operation. See illustrated
parts list.
Low Range Use May Reduce
CVT Operating Temperatures
The basic operation of the CVT system is dependent on engine speed and vehicle
torque requirements. As engine speed increases, the force exerted on the
movable drive sheave by the fly-weights also increases. This, in turn, increases
the amount of "pinch" applied to the drive belt. Similarly, if the engine speed
decreases, the amount of centrifugal force decreases, reducing the amount of belt
"pinch."
On this ATV, the approximate gear ratio difference between high and low range is
1:2.05. This difference in gearing affects the operation of the CVT, especially at
speeds less than 7 MPH, due to the system's dependence on engine speed.
By switching to low range while operating at low ground speeds, the air
temperature in the clutch will be reduced. Reducing the temperature inside the
clutch cover extends the life of the CVT components (belt, cover, etc.).
(Continuously Variable Transmission)
50