Lowering the Vehicle

When a load is removed from the rear of the vehicle, the body rises, causing the position sensor actuating arm to rotate downward. This again activates the internal timing circuit. After the initial fixed delay, the sensor provides a ground to complete the exhaust solenoid circuit, energizing the solenoid. Now, air starts exhausting out of the shock absorbers, back through the air dryer and exhaust solenoid valve, and into the atmosphere.
As the vehicle body lowers, the actuating arm rotates to its original position. When the vehicle body reaches its original height, +/- 25 mm (+/- 1 inch), the position sensor opens the exhaust solenoid circuit, which closes the exhaust solenoid and prevents air from escaping.