LR3 suspension compressor air fittings

[allagras]

Hi All
So i finally got round to redressing my compressor (original Hitachi) yesterday but run into a problem....
I had to cut the 2 main lines from the compressor as the push fits just would not budge but after fixing up the compressor itself i'm stuck as to how to reconnect the 2 hoses - inlet and exhaust air I believe - not the ones from the end of the dessicant can.

Looks like at least one of the lines has a small brass tube in the end that guides (?) it into the push fit.

Has anyone else faced this issue, and how did you solve it? I don't really want to pull the compressor apart again to pull out the snap fits if i can rejoin the pipes in some way. Any advice gratefully received.

And yes, I did try and make a video of the compressor removal which I will post once I've edited it

Thanks All
Grant

[101RRS]

When I removed my compressor a couple of years back I had the same issue and had to cut the pipes a couple of inches from the compressor. As you indicated these pipes are the air intake from the air filter up in the drivers side rear quarter and the compressor exhaust pipe which goes to the same location. Both are low pressure so dont need any special piping.

I just used some rubber fuel line of the appropriate size as a joiner to connect the short bit of pipe coming out of the compressor to the pipes already running under the car - works fine.

[Eric SDV6SE]

When I did mine, I used my shop compressor and the blower gun with a thin nozzle to blow out all around the compressor. Dirt gets jammed in the push fittings meaning that you can't press them in to release the collet and so the tube.

After blowing all the dirt out and gentle prising with a fine flat tipped trim removal tool, they undid fine. Re connecting cut lines, any for of vac tube g or rubber hose of the right ID will do.

[LRD414]

Or source a couple of quick connect air fittings

[allagras]

Hi guys

Thanks for the feedback. I managed to get it all back together and connected - just got sone 6 & 4mm steel pipe and pushed it into the hoses - had enough slack so just pushed them back into the snap fits. Will do for now until I can get some free time to replace the connectors.

However....system wont repressurize. I stupidly drained the air tank before I refitted the comp and now even tho the compressor runs about 5 mins it isn't pumping anything up...anyone got any ideas?

Thanks
Grant

[BradC]

A couple of things to look at :

• The compressor is stuffed
• There is a leak in the gallery (that could be between any valve block and the compressor)
• The pressure sensor is stuffed
• The exhaust valve is jammed open
• There is a leak in the dryer

[allagras]

Thanks Brad

Given that all was reasonably well (albeit with a small leak somewhere) pre compressor redress, I'm going to check the exhaust valve first....that's the only thing I really messed with whilst removing the compressor...

G

[Eric SDV6SE]

Plus the air lines that you cut.....

[allagras]

Thanks all
Traced the issue to a jammed open Exhaust valve (as advised - ta) - so compressor now pumping.
I am getting air into the reservoir block now, but v slowly - compressor runs for 12 seconds then shuts off - and it isnt hot. If i switch the car off and restart, comp fires up again for 12s...going to take a long time to pump up at this rate - does this sopund right? I was expecting the pump to run longer and shut off if overheating...

[BradC]

Thanks all
Traced the issue to a jammed open Exhaust valve (as advised - ta) - so compressor now pumping.
I am getting air into the reservoir block now, but v slowly - compressor runs for 12 seconds then shuts off - and it isnt hot. If i switch the car off and restart, comp fires up again for 12s...going to take a long time to pump up at this rate - does this sopund right? I was expecting the pump to run longer and shut off if overheating...

No, that's not right. Have you got any fault codes? There are so many plausibility tests in the system to try and stop it lunching stuff, it is pretty specific about its fault codes.

With the Hitachi it should run until it's at pressure, or the head > 140C or the motor brush plate > 130C.
When I last emptied the entire system I let it run for 5 minutes then shut it off. Let it cool for half an hour and then finished the job. It probably took ~6.5-7 minutes of total run time to completely pump up the reservoir and lift the car to normal height.

Is it actually opening the reservoir valve? It could be pumping up the gallery and cutting out on the pressure limit, although I wouldn't expect that to take 12 seconds.