OPERATION - Engine Speed Input Signal (Pitot Pressure) / Shift Lock Safety Mechanism / Oil Cooler

A pitot tube is inserted into a chamber attached to the primary pulley, and a hydraulic pressure is detected and interpreted by the control valve assembly as engine speed.

If all four wheels lock up under braking, pitot pressure is not produced and the pulley (speed) ratio will change. The mechanism "holds" the pulley ratio as it was when lock-up occurred. This prevents the engine overreving.

An oil cooler is located as part of the vehicle radiator. Oil is fed to the cooler under pressure, where its temperature is reduced by the radiator oil flow.