The vehicle may have the Hendrickson HAS Series single-axle air suspension which is designed for a single-axle on-highway use. This feature is available in 19,000 lb (8 613.3 kg), 21,000 lb (9 525.4 kg) and 23,000 lb (10 432.6 kg) capacities.

Rear Air Suspension Dump Control

If the vehicle is equipped with the Hendrickson HAS Series single-axle air suspension, you may have this control. The air suspension dump control allows the operator to lower the deck height approximately 4.5 inches (11.5 cm) from the normal frame height.

The switch to deflate and inflate the air suspension is located on the instrument panel.

Press the bottom of the switch to deflate the air suspension and lower the deck height. Press the top of the switch to return the suspension to normal deck height.

An indicator light will come on and stay on whenever the switch is in the dump position.