Compressor constantly running, Why??

**redandy3575** · 16th July 2012, 10:04 PM

UPDATE: Ok, i took out the valve block again!!! to have another look. Checked all the seals, all good. There doesn't seem to be any leaks anywhere, the valve block is operating as per normal, no air is leaking out and in the morning the air springs are still up (not sagging).

I'm starting to lean more towards the compressor not providing enough pressure. I did a seal replacement about 3 months ago, and i think i may have damaged the piston itself with a couple of burrs from the flat screwdriver, which i did sand smooth again, but may be enough to prevent the compressor from reaching the right pressure.

**wayneg** · 17th July 2012, 05:16 PM

It is easy to put a burr on the piston when replacing the seal. Even if the seal is new the burr will quickly carve a nice groove into the cylinder. Bite the bullet, buy a new cylinder, pull the compressor apart and get rid of the slightest burrs on the piston and seal retaining ring.
Even with a perfect seal the compressors slow down with age, I have 3 and they all are good but pump at greatly differing rates, one is pretty useless. The next time one packs up I shall be fitting a Viair type pump beloved by the American air riders. No doubt you would have to do a few mods to get it to fit
There are some great deals on generic ones at the moment on e-bay
http://www.ebay.com.au/itm/New-Chrom...item2ebf048e15

**glenhendry** · 18th July 2012, 11:31 AM

I think you need to be monitoring the pressure in the tank to know when the pump should be on and off? A gauge off the main storage tank has to be the definitive way to know if there are leaks in the system causing the pump to run?

**redandy3575** · 26th July 2012, 09:06 PM

Ok, i've installed a fully refurbished compressor which seemed to pump up the system quicker, but still misbehaving slightly though not as bad as before.

I've got to get myself a pressure gauge and see if air is possibly leaking between the valve block and the air tank. The problem is that the air line runs in hard to reach areas above the chassis. Though i'm still not convinced that there is a leak along that line, as after leaving the RR for 3 days, and came back, pulled out the air line from the the tank, and there was still a humongous amount of pressure there, so it cannot possibly be that, or can it? Can the pressure switch be the cause?

**RR P38** · 29th July 2012, 09:55 AM

Are you hearing the EAS compressor running?
Try replacing the mounts on the compressor.
These things do run a lot, the system is not really all that intelligent and is constantly adjusting its self.
Have you recalibrated the height sensors via test book/Hawkey etc?

**redandy3575** · 31st July 2012, 05:50 PM

Originally Posted by RR P38

Are you hearing the EAS compressor running?
Try replacing the mounts on the compressor.
These things do run a lot, the system is not really all that intelligent and is constantly adjusting its self.
Have you recalibrated the height sensors via test book/Hawkey etc?

No, i can't say that i have

I did replace the rear left hand sensor recently with a newish type. The sensor came with and adjustment bracket which is suppose to re-align the sensor to its true position. After i installed the sensor, the EAS went back to normal, and the fault was cleared with the kicker, and the sensor numbers matched with the other sensors, so i'm not sure if there is anything else that needs to be done.

Maybe i'm just getting paranoid!!!!

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