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Thread: Temporary fix for sick compressor

  1. 20th December 2010, 08:44 PM #1
    Graeme
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    Temporary fix for sick compressor

    The suspension compressor has for a few days been giving the impression of progressively failing but today the vehicle dropped to its knees and wouldn't get back up. Luckily I had to drive only 1.5km back to the house, although my wife preferred to walk then get picked-up in the tractor. After discovering virtually no pressure from the dryer, the air intake line was removed and a short rubber hose inserted in its place so that a nozzle on my shed compressor could be inserted. Started the car and before the compressor stopped (about 10 seconds), air from the shed compressor was fed into the vehicle compressor. Up she got like a camel to full normal height, so switched off and whipped-out the engine bay suspension fuse before it could drop again.So, no suspension system until a new valve arrives (and maybe then a compressor) but at least she's driveable, even though there's a chime every 30 seconds or so.
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  2. 20th December 2010, 10:17 PM #2
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    101RRS
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    That begs the question should in air line be spliced to allow the air bags to be pumped up by an external air compressor in an emergency. Most tyre versions can get to 150psi which may not raise the car to offroad height but put enough air in to at least make the ride half comfortable.

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  3. 21st December 2010, 06:18 AM #3
    Graeme
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    From what I've read, the compressor failing to pump sufficiently seems to be the only component that stops the system from getting up to height, with other faults causing it to lower either slowly or the ecu drops it to the bump-stops. A tyre compressor connected to the air inlet line in place of the filter should do the job.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
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  4. 21st December 2010, 06:46 AM #4
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    Good idea and one to place in the memory bank, but hope I will not need to employ.

    I assume the new compressor valve is external & directly fitted to the exhaust port of the compressor? Or internal to the compressor?
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  5. 21st December 2010, 07:01 AM #5
    Graeme
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    Externally but the compressor c/w cradle needs to be removed from the vehicle first. The TSB to replace the valve and dryer allows 0.5 hrs so the dealers must be rather slick workers as I'll be lucky if I only take twice as long.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
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  6. 21st December 2010, 07:02 AM #6
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    Quote Originally Posted by garrycol View Post
    That begs the question should in air line be spliced to allow the air bags to be pumped up by an external air compressor in an emergency. Most tyre versions can get to 150psi which may not raise the car to offroad height but put enough air in to at least make the ride half comfortable.

    Garry

    yes, I've done this mod in several varients to several air ride vehicles now..

    as part of the big mod I also setup the fill point so that it can be used in an emergancy to pump up tyres. Ive found that the suspension tank once full is generally enough to inflate a seated tyre to a safe drivable pressure without having to run the compressor. not road pressure but it will get you out of trouble. The compressor will get it up to full road pressure but on larger tyres you have to be careful not to let it time out.
    Dave

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  7. 21st December 2010, 07:55 AM #7
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    I think some of the problems with the compressor are due to the heat generated by it when it's working. I know that on a Simpson trip it timed out after just a few uses. Have often thought about removing the "thermal blanket" or noise insulation from the cover to give it more room to dissipate heat. Has anybody tried this?
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  8. 21st December 2010, 10:45 AM #8
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    Quote Originally Posted by discojools View Post
    I think some of the problems with the compressor are due to the heat generated by it when it's working. I know that on a Simpson trip it timed out after just a few uses. Have often thought about removing the "thermal blanket" or noise insulation from the cover to give it more room to dissipate heat. Has anybody tried this?
    Yes, once when it was caked with mud and overheated. Worked fine but was rather loud!

    Cheers,

    Gordon
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  9. 21st December 2010, 02:55 PM #9
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    Gordon,did you notice whether you got more time before it timed out?
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  10. 21st December 2010, 04:06 PM #10
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    Quote Originally Posted by discojools View Post
    Gordon,did you notice whether you got more time before it timed out?
    Not sure - I took the cover off to let it cool down in the first place, because prior experience had shown that it could take 30 min or more. It was usable again in around 10min and didn't fault again, but I had a lot of cleaning to do!

    Cheers,

    Gordon
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