Depressurising rear Airbags.

[WildOne]

G'day folks,
Got my new suspension today for the Disco and would like to fit it this weekend, just need to know what the best way is to de-pressurize my rear sls suspension before i remove the airbags.
Rave says to use testbook, anybody have some wisdom to share?

Cheers, Phill

[BigJon]

Are you removing the airbags and fitting coils?

If so, the last one I did I jacked up the chassis then just cut the airlines next to the airbags.

[WildOne]

I'm keeping the airbags so don't want to damage them. i neeed to remove them to put in a 2" spacer under the bag.

[WildOne]

G'day folks,
Got my new suspension today for the Disco and would like to fit it this weekend, just need to know what the best way is to de-pressurize my rear sls suspension before i remove the airbags.
Rave says to use testbook, anybody have some wisdom to share?

Cheers, Phill

Anyone?

[Scouse]

While I'm not up on the Disco2, can you not lower the rear end down which will release most of the air.

Then you can release the bottom mounts of the springs (maybe dampers too), lift the body & fit your spacers.

[WildOne]

While I'm not up on the Disco2, can you not lower the rear end down which will release most of the air.

Then you can release the bottom mounts of the springs (maybe dampers too), lift the body & fit your spacers.

G'day Scouse,

You can lower the rear end uf you have the optional sls remote control, it's used for when hitching up trailers/caravans etc. I don't have one.

I was thinking i could disconnect the height sensors and trick the BCU into thinking it needs to release air to level the vehicle. Do you think this will work?

[Utemad]

I've never seen one but I have read that when you fit spacers you have to adjust/replace a bracket to realign whatever it is that tells the computer that your rear has sagged under load. So if you got hold of that sensor you could push/pull/move/wobble or whatever you need to do to it to depressurize the bags.

[jsp]

I wouldn't feel comfy playing about with the sensors from the point of view you might put the system into fault mode and if its anything like the rangies its a dealer reset. Maybe its different I dont know.

If you have the capability of lowering to bump stops then its not too bad - just pull the airline out of the collet at the valve block or the top of the airbag if you can get to it - just make sure you have sunnies on or protective eye gear as theres a bit of pressure. I have pulled lines of the rangie air springs many times and copped a face full of 45-60 PSI air for the 5 seconds it takes to deflate a bag the car has its weight on.

I would jack up the rear chassis and then put an axle stand under the axle just to keep it in place and pull the air lines out.

Don't know if it will fault the system when you put it back together - just make sure you dont start the car with it unplugged

[stevo]

disconnect the battery,jack up the rear of the car and support the body of the car and allow the axle to hang down a bit,next remove the cover from the compressor housing.
Towards the front of the compressor you will see a valve bank with three hoses going to it slowly undo the two outside ones until you hear air coming out most times a couple of turns should do it and give them a small wiggle at the same time.
Becareful and make sure the vehilce is fully supported you do not have to completely remove the bag just twist at tha bottom 90 degrees

[justinc]

disconnect the battery,jack up the rear of the car and support the body of the car and allow the axle to hang down a bit,next remove the cover from the compressor housing.
Towards the front of the compressor you will see a valve bank with three hoses going to it slowly undo the two outside ones until you hear air coming out most times a couple of turns should do it and give them a small wiggle at the same time.
Becareful and make sure the vehilce is fully supported you do not have to completely remove the bag just twist at tha bottom 90 degrees

:D:D:DBeat me to it Stevo!!

What he said, just undo the fittings slightly and let the air out that way. 7/16" or 11mm spanner from memory.

JC

[BradM]

Jack up the chasis on one side and then undo the nut with the air line thorugh it going into the top of the airbag. You will get to a point where air starts to escape. let it go for a while and keep loosening it until all the air has escaped and you have removed it from the air bag.

You can now undo the top clips and twist the bag to release it from the axle housing. Install your kit for that side, refit the air bag, paint the airline nut thread with number 3 aviation gasket and screw it back into the air bag.

Then lower the chasis jack so the body was sitting right down on the air spring.
Start the engine and with the drivers window down and the doors shut lean in through the window and hold in the SLS Lift and lower button on the dash. once the light starts flashing on the dash leave it alone and slowly the air bag should inflate.

If you have the chasis supported too high with the jack the sensors are telling the ECU that the lift is OK but it's not. Repeat for the other side.

This worked for me and I hope it works for you.

BradM

[WildOne]

Thanks Fella's
Just the info i was after.
I'll go and play with my suspension now:eek::eek: