How to refill the Ram air suspension system
Tools needed to service Ram air suspension
Before you manually deflate the system, be aware that you’ll need the Mopar 10247B and a nitrogen supply tank to refill the system. Obtain the tank and nitrogen from a local supplier (nitrogen must be Purity Class 5 (99.999% pure). You’ll need the tool to deflate and refill Ram air suspension.
For information on how to deflate Ram air suspension, see this post
Steps to perform a complete refill on Ram air suspension system
Raise vehicle so the suspension is hanging (wheels off the ground)
Make sure the valve is closed on the Air Suspension Refill Tool – 10247B. Also, make sure the valve on the nitrogen tank is OFF.
Remove the right rear (passenger side) wheel inner liner to gain access to the reservoir.
Locate the fill fitting on the right hand side of the air suspension reservoir (located underneath the pickup box)
Remove the reservoir fill connection cap
With the Air Suspension Refill Tool – 10247B attached to the nitrogen tank, connect the quick coupler to the air suspension reservoir fill port.
The pressure regulator on the Air Suspension Refill Tool – 10247B is preset to 175-psi. Open the valves on the tool and the nitrogen bottle. Once opened, the pressure will equalize in about 10-15-seconds, resulting in a proper fill.
Close the valves on the tool and nitrogen tank
Using a scan tool, locate the fill routines shown under the Air Suspension Control Module (ASCM) section and perform a short fill in one rear air spring. Check to make sure the air spring is seated properly before continuing with a complete fill. Repeat this step on the opposite air spring.
Refill the reservoir following the procedure shown above.
Using a scan tool, locate the fill routines shown under the Air Suspension Control Module (ASCM) section and perform a complete fill on each front spring and shock assembly.
Make sure the tool and nitrogen tank valves are closed. Then remove the tool and replace the fill cap.
Lower the vehicle completely
Using a scan tool, command the vehicle to normal ride height
Add to the system or deflate to atmosphere using the ASCM routines on your scan tool. Finish by performing the air mass calculation routine until the system repsonds with Air Mass OK. Finally, perform the ASCM verification test.
©, 2020 Rick Muscoplat
Posted on by Rick Muscoplat