Thread: D3 Suspension Fault, airline has blown twice

Is the compressor relay sticking? The relay should have been replaced along with the compressor to a heavier duty one. The compressor's mechanical exhaust valve should also have opened before any lines blew so it may be faulty as well. Alternatively the pressure sensor in the reservoir valve block may be faulty.

Edit: Diagnostics wont reveal if the pressure sensor is faulty - a seperate gauge or another sensor will be needed.

Don't get a genuine replacement air-line, just get joiners and some 6mm pressure tube.

A Land Rover part number for the 6mm push to connect union is STC8580; it is actually a part from the older FFRR's air system but works well for air line repairs on the 3.

You will also need some transport grade air brake 6mm tubing. A Land Rover dealer might have that in bulk, but if not, heavy duty truck repair shops that work on Mercedes, Volvo, Mann, etc should have some.

And yes, you must have a pretty strong air compressor with a frozen relief valve or the air line is touching something hot or rubbing. The bursting pressure of air brake line is supposed to be about 80 bar, (1,160 psig) at 20C; the working pressure is about 27 bar, (390 psig), hence bursting due to high air pressure seems odd.

I would favor heat or rubbing when in off road height, and since the break is in near the same place as previous, perhaps ....

http://www.disco3.co.uk/gallery/albu...d39a17d24d.jpg

Thanks heaps guys, We have a truck parts supply in the industrial area, so I will call around and ask for a 6mm joiner. The airline isn't rubbing on anything and well clear of any heat items such as the exhaust system. The relay was replaced when the new compressor was installed, so looks like relief valve faulty. Our Land Rover stealer said they will measure the pressure of the system when I repair the break.

Shops that sell hydraulic fittings and hose as well as metric and imperial fittings are also a source of suitable DIN spec metric air line and fittings.

I have ordered fittings from these guys based in Mordialloc Victoria and they will have friends elsewhere.

General Pneumatics Pty Ltd

General Pneumatics, GP TRUCK PARTS, GP, TRUCK PARTS, TRUCKMASTER, DUMPMASTER, GENERAL, DRAIN VALVE, SUZI COIL, DOT FITTINGS, BRASS,

The attachment is a two page pdf spec re airline. There is a table at the bottom of the second page re the transport grade DIN spec stuff.

If you need air line or connectors, you can order them from me (I keep spares to go with the EAS kits we sell).

You need to be careful with the type of airline you order - some of them de-rate very rapidly at over 40degC!

Cheers,

Gordon

Hi everyone, the car went in last Thursday to our local Land Rover stealer service department. They replaced the blown airline + the 70A compressor relay (as for some reason wasn't replaced when the new compressor went in 14 months ago). They performed an air pressure test on the system plus checking valve blocks, etc and said everything was normal, couldn't fault the system. They also cleared the logged fault codes due to the split airline. This has me a bit worried now hoping they would have found something wrong. This is the 2nd airline replaced in 8 months. I will take a photo of the blown airline section and post it soon. Thanks again for your help.