Air Springs-3500

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

All pressurized air suspension components contain high pressure air (up to 220 psig). Use extreme caution when inspecting for leaks. Wear safety goggles and adequate protective clothing when inspecting or servicing the air suspension system. A sudden release of air under this amount of pressure can cause possible serious or fatal injury.

WARNING:

Support the vehicle by supplemental means before performing any work on the air suspension system to prevent the vehicle from changing height. Before any given component is to be serviced it must be deflated. Servicing the air suspension system without supplemental support, or with pressure in the specific component, can cause possible serious or fatal injury.

CAUTION:

When removing an air line from a component and the air line is to be reused, do not remove the 90° fitting or the brass fitting from the air line. If either is removed, the air line must be replaced. New components have air line fittings attached; however if the original air line is used the original fitting must also be used. Do not remove protective caps or plugs from air lines or components until ready to install the air line to prevent moisture or dirt intrusion. All air line fittings must be hand started to avoid cross threading.

Fig 1: Measuring Suspension Curb Ride Height

Courtesy of CHRYSLER GROUP, LLC

NOTE:

Carry out an air suspension curb ride height measurement on both sides of the vehicle before removing an air spring.

Calibrate Sensors

Measure from the center of the wheel to the ground (A).
Measure from the frame to the ground (B).
- The frame reference point for measurement (B), for vehicles with 140 and 169 inch wheelbase: 127.59 mm (5 in) before opening in frame.
- The frame reference point for measurement (B), for vehicles with 149 and 160 inch wheelbase: 76.79 mm (3 in) before opening in frame.

If checking ride height, subtract A from B, for the difference (C). The vehicle range should be:

Trim Set Height Targets
Single Rear Wheel Vehicles (4X2)	307.19 mm (+30/-10 mm)
Single Rear Wheel Vehicles (4X4)	296.20 mm (+30/-10 mm)
Dual Rear Wheel Vehicles (4X2)	307.19 mm (+30/-10 mm)
Dual Rear Wheel Vehicles (4X4)	296.20 mm (+30/-10 mm)

Enter the difference C (mm only) into the scan tool.
With the scan tool, use the air suspension control module (ASCM) routine (Ride Height Calibration). If the vehicle is not within specification, carry out the sensor calibration sequence.

Removal

Using the scan tool, disable the system.
Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
Using the scan tool, deflate the system.

Fig 2: Upper Air Spring Bolts
Courtesy of CHRYSLER GROUP, LLC
Remove the two upper air spring bolts (1).
Disconnect the air line.

Fig 3: Lower Air Spring Nut
Courtesy of CHRYSLER GROUP, LLC
Remove the two lower air spring nuts (1).
Remove the air spring and bracket from the spring seat.