Thread: Do not expect EAS to work off road on D4

My D4's compressor has failed in as much as is no longer produces sufficient pressure to raise the front which results in a fault. The rear takes several minutes to raise from normal to off-road height but the front is still where it was when my tyre compressor assisted the vehicle compressor a week ago. The front has always been slow to rise. The compressor delivery valve was replaced today but with no improvement.

I could not blow through the dryer at all. The dryer has a spring that pushes a plate against the desiccant to keep it compacted, but the desiccant is so compacted that air does not flow through unless under high pressure. I think that the dryer might be responsible for the demise of the compressor. Due to having spilt some desiccant, the volume has been reduced and I can now blow through the dryer but its too late for this compressor. The desiccant didn't appear damp at all yet was almost full to capacity with very little space left for more expansion, as though there was too much desiccant.

AFAIK, LTB000269 which requires both the dryer and delivery valve to be replaced, had already been actioned. LTB000270 requires a new compressor to be fitted. It will be good if a new compressor overcomes the original slow-rising front issue. If not then I'll be checking that the front valve block is indeed for the front not the rear as one has larger galleys and I suspect the vehicle front is heavier than the rear so needs larger galleys.

Graham ,
I had the compressor changed, made no difference, still slow to raise (2 mins), or overheats before it gets there.
LRAs/ dealer spin on the rear first then front raising was, if it's night and your lights are on it stops lights pointing up at oncoming cars ( ummm OK )
It seems now spin is slow raising is to protect the system, don't know how that works if it causes the compressor to overheat
Hope your problem gets solved and then maybe mine can follow suit.
Cheers Ken

Hi Ken,

I've just read on Disco3.co.uk about a D3 owner who replaced the dryer after having been told that be needed a new compressor. His compressor now only runs for 20-30 seconds getting the vehicle up to height.

If I get to fit the new compressor, I'll do a blow check of the new dryer before fitting, maybe even doing a bench run of the compressor comparing the output of the new dryer with the "improved" old one. Perhaps even new compressors have been fitted with overly-restrictive dryers.

I've got an AUG 2009 D4 3.0 SE. Probably one of the first in Oz. The suspension was a bit moody but 90% of the time was fine. I reported the slow raise time to LR, bum first of course and got all the stories that have been reported on this thread. LR changed the drier and it seemed fractionally better.

I then got a few overheat warnings and a complete failure. Once the car had been off for a little while, it was all good and no repeats. However I still took it to LR and they changed the compressor. It's been fine since then.

On a week long Fraser Island trip I was constantly changing height due to the speed you can drive on some of the areas. The car had no issues at all.

It's been almost a year since the compressor was changed and it's been faultless since then. It does get a little slow after constant use.....but nothing more than 15 to 20 seconds. Normal is between almost instantanious and 5 secs.

Why are people selecting access when on the beach? It's not a good idea to start with (not trying to excuse LR for shoddy compressors, just trying to understand the logic here).

Cheers,

Gordon

Originally Posted by gghaggis

Why are people selecting access when on the beach? It's not a good idea to start with (not trying to excuse LR for shoddy compressors, just trying to understand the logic here).

Cheers,

Gordon

Cause it's there I suppose.

I used to use mine all the time...not on the beach but when parking in the city, etc.

After a while I just couldn't be bothered anymore. I only use access if loading something really heavy or awkward or once in a blue moon for short arse people...LOL!!!

I never used to actually have any issues raising from access to normal just from normal to off-road.

Cheers,

Kev.

Originally Posted by gghaggis

Why are people selecting access when on the beach? It's not a good idea to start with (not trying to excuse LR for shoddy compressors, just trying to understand the logic here).

Cheers,

Gordon

Don't usually use access on beach, but have rooftop tent and sometimes it's easier to level ladder. Problem is going normal to off road
Cheers Ken

Originally Posted by Celtoid

I then got a few overheat warnings and a complete failure. Once the car had been off for a little while, it was all good and no repeats. However I still took it to LR and they changed the compressor. It's been fine since then.

My compressor has just been replaced. I got the opportunity to try blowing through the new dryer before fitment and was pleased to find that it was very easy. Hence the original compressor had a good reason to be slow at raising the front and to then totally fail after such a short time. The revised s/w that will reduce the reservoir pressure to remove inappropriate excessive workload from the compressor still needs to be applied, as applies for all D3, D4, RRS & FFRR vehices. It appears to have overcome the slow-rising special feature.