EAS pressure bleeding

[QCNR]

I will be replacing the EAS airbags on my P38.
I have read the manual and it says the system needs to be depressureized with diagnostic equipment.
I know a lot of you people have swapped to coils, how did you depressureize the system for removing the springs.

If it is not done with the diagnostic kit, could this lead to faults and bumpstop ride?
Or is it simply a way for dealers to make more money?

 

[jim-00-4.6]

If it is not done with the diagnostic kit, could this lead to faults and bumpstop ride?

Only if you forget to refill them before driving.

Or is it simply a way for dealers to make more money?

yes.

Get some safety glasses.
look at the valve block. there's a bunch of tubes going into the side.
Starting at the front, release the tube from the vavle block by pressing the ring around the outside of the tube IN and gently pulling the tube OUT.
Sometimes a flat-blade screwdriver helps. Sometimes a pair of pliers help. The #6 tube goes to the air tank, so be prepared for a substantial rush of high-pressure air to come out.
The next 4 from the front are the springs. Once you release the pressure from the springs and the tank, the system is empty, you don't need to remove those 2 larger tubes.
Reconnect all tubes (in the right place) before stirring up a bunch of dirt under the hood.

There's also a way to do it by jumpering the connector under the front left seat, but I don't recall which pins to jumper. Let me know if you'd rather do it that way, & I'll look it up.

 

[QCNR]

Thanks for the advice

 

[etcatmeat]

I would recommend to start with climbing under the truck and loosening the plug on the tank a few turns to let the air out of the reservoir first. But I've only done this once.

 

[skippy3k]

I would do Jim's approach...it's much safer.

 

[etcatmeat]

I would do Jim's approach...it's much safer.

Danger is my middle name. J/K It does seem safer Jim's way, I would do it his way if I had to do it again now that I think about it.

 

[rover-renovations]

http://rangerovers.net/repairdetails/airsuspension/suspump.html#jumpers

you don't need to drain the tank to change the springs.

do them in pairs, by axle. Raise it up to offroad height and put jackstands under the radiator support in front or tow hitch xmember in back. remove both wheels and let the axle hang down to give you plenty of room.

sweat/swear to get the old bags off. put some dish soap on the lips of the new bags to lubricate and seal them on. use the jumper wires to inflate BOTH at the same time, enough that when you jack up the center of the axle the whole truck comes up. put both wheels on, set them on the ground and slowly vent off the springs. they should fold up nicely. if you try to compress the spring without air in it it will crumple sideways an pop off.

If you're doing the entire assembly it's a little easier, but you have to do the above if you over-extend it and it comes unrolled.