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Air Suspension
Note:
Do not operate your vehicle without air in the suspension springs. Operating your vehicle without air in the suspension springs damages the suspension, degrades ride performance and may cause property damage.
The air suspension system automatically adjusts to different loads to maintain a constant frame height, allows for ease of vehicle loading, provides improved vehicle ride, and increased driver comfort.
Air Suspension Dump Button
Note:
The suspension dumps air when the ignition is in the accessory or on position, but fills only when the ignition is in the on position.
A button located on the instrument panel controls the system. It operates only when the ignition is in the accessory or on position and the air tanks have sufficient pressure to fill the air springs. When you turn off the ignition, the suspension remains in whatever state it was last set.
Pressing and holding the button for two seconds exhausts air from the air springs, lowering the frame for loading. Pressing and holding the button for two seconds fills the air springs so your vehicle remains at normal ride height.
System Indicator Light
The air suspension indicator light illuminates when using the button to release air pressure in the rear air springs. Never drive your vehicle when the warning lamp is illuminated and there is low (or no) air pressure in the springs.
Connecting and Disconnecting a Trailer with Air Suspension and Air Suspension Dump Button
When connecting to a trailer:- Press and hold the button for two seconds to exhaust air from the air suspension system.
- Press and hold the button for two seconds, and then raise the landing gear after making the connection to the trailer.
- Lower the landing gear, and then press and hold the button for two seconds.
- Disconnect the brake hoses, trailer-side and rear light connectors, then pull the release lever on the fifth wheel.
You must fill the air springs before operating with a trailer or operating in the bobtail mode.
Suspension Conversions
WARNING:
When operating a loaded vehicle, the driver must keep all adjustable axles on the ground at all times, supporting their share of the vehicle’s load. Failure to do so can overload other axles, tires, wheels, springs, steering components, brakes and frames, resulting in early component failure, loss of vehicle control, possible property damage and personal injury. |
We do not recommend performing, or approve of, suspension conversions. However, we understand that, on occasion, others install aftermarket add-on suspensions on the truck chassis that allow operator control for weight transfer from other axles (such as air lift axles).
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