Originally Posted by Deserthucker
Thats what worries me, it is out of warranty and I would have a shit fight to convince them they are the cause of the problem.
Cant see it been more complex to recharge as a zircon unit.
Need to find a way to get gas into the accumulator behind the rear seat.
You've probably been there already - but this from WK2 Jeeps………Jeep Grand Cherokee WK2 - Quadra-Lift Air Suspension system
"Refilling the System
If the air suspension system is fully depleted of air it can be refilled using a scan tool and Air Suspension Refill Tool - 10247 which is used with a nitrogen supply tank (can be acquired at a local gas supplier). The nitrogen must be Purity Class 5 (99.999% pure). The size and volume of the nitrogen supply tank will determine how many air suspension systems can be filled."
You'll notice on this page that there is a warning that pressures can be up to 220psig in the system. Whether that is the reservoir pressure or compressor internal would be difficult to say.
I did read ages ago somewhere that the connection to the tank was special - someone had an issue and their dealer wasn't able to connect to the tank.
Its not hard to get the cover off and have a look though.
What about posting your question on the US side of the forum? - might attract a bit more useful info.