Christmas in my EAS Pump

[poleonpom]

Yes, you're not reading it wrong, it looks like Christmas has happened in my EAS pump.

I bought a set of replacement Teflon rings to replace in my EAS pump off of eBay. The first one was a real struggle to get on, so when the pump stopped pumping after a week I wasn't too surprised, when I pulled the pump, to find the ring had disintegrated and "snowed" Teflon in the pump.

I replaced the ring again and this time it went on easily. Once again, after a couple of weeks, the ring has disintegrated.

Has this happened to anyone else? I highly suspect being sold dodgy Teflon rings. If this is the case, then does anyone know where to get good quality Teflon rings?

Jonathan

[TheTree]

Maybe your liner is scored and is destroying the seals?

One crapping out may be bad luck but two points to something else

Maybe look at one of these kits?

Range Rover P38 EAS AIR Suspension Compressor Piston Liner Seal Repair FIX KIT | eBay (http://www.ebay.com.au/itm/RANGE-ROVER-P38-EAS-AIR-SUSPENSION-COMPRESSOR-PISTON-LINER-SEAL-REPAIR-FIX-KIT-/151418972434)

Steve

[poleonpom]

I'll take a good look at it when I next strip it down. Must admit that I didn't look very closely last time.

How cheap is that replacement? I'm shocked that there's a replacement part for the P38 for under $20! Thanks Steve

[p38arover]

Maybe your liner is scored and is destroying the seals?

One crapping out may be bad luck but two points to something else

Maybe look at one of these kits?

Range Rover P38 EAS AIR Suspension Compressor Piston Liner Seal Repair FIX KIT | eBay (http://www.ebay.com.au/itm/RANGE-ROVER-P38-EAS-AIR-SUSPENSION-COMPRESSOR-PISTON-LINER-SEAL-REPAIR-FIX-KIT-/151418972434)

Steve

I've just rebuilt a compressor with that kit. I have yet to install it. I might do that tonight.

The piston needs working and shaping to get it into the new cylinder. There's a YouTube video showing how to do that.

The small O-ring for the reed valve in the head was too thick and I couldn't fit it into the groove. The air filter pad is bigger in diameter than the one removed but I just stuffed it in.

[p38arover]

Has anyone seen any info on the time required to pressurise the system from empty?

[davidsonsm]

I've always worked on 8 minutes from empty to 145psi for the OEM pump with no leaks.

[poleonpom]

Well, stripped it down and the bore was scored. I'm certain it wasn't like that before as it was so noticeable, must have had a rough spot that I didn't notice.

Rubbed it down lightly, pu5 a new rinh in and also ordered the replacement.

Let's see if it lasts. ..

[p38arover]

I've always worked on 8 minutes from empty to 145psi for the OEM pump with no leaks.

I just emptied the air reservoir to check for water then timed a repressurisation. Note that the car was at normal height.

PSI Mins
80.....2
110...5
130...7
140...9
145...10 shutoff

I may do another run but checking pressure each minute. It could then be graphed.

[PaulP38a]

Seems about right Ron, with the door open or already at height. A couple of minutes either side of around 8 mins is no biggie in my view.

Poleonpom - if you get no joy with the new piston seal, pm me as I still have a few of the old Hard Range seals in the shed.

[Keithy P38]

Thanks for putting times up Ron. I'll run my tank empty on Thursday and time my twin compressors to see how long they take to fill 'er up.

Will do 30sec intervals and you can graph side-by-side if you like?

Cheers
Keithy

[p38arover]

Pressure measurements at set intervals are much easier than the other way around. I'll do another run.

[poleonpom]

Poleonpom - if you get no joy with the new piston seal, pm me as I still have a few of the old Hard Range seals in the shed.

Thanks Paul,
I've got a new post on liner on its way, but always interested in a set or two of.spare seals - thanks