on board air compressor, disco s1

[discowhite]

ive almost finished the compressor install.
just need air tank, air hose and oil/air seperator, oh and a pressure
cut out switch.

had a dry run today. will work well i think. pumps 45l to 60psi in 2min.







any coments welcome.

cheers phil.

[sclarke]

Now they are the compresser to have..... Why???
They dont need to be oiled... they have a sump......

[Defender200Tdi]

Great job DW. 8) The York type compressor is certainly the one to have if you can fit it in.

Have you blocked the feed from the sump into the suction port, or are you relying on a filter to remove the oil?

If you haven't already seen it, there's a good description of the modification for a York to stop the oil entering the suction port here:

http://www.jedi.com/obiwan/jeep/york_oilmod.html

<div class='quotetop'>QUOTE</div><div class='quotemain'>Now they are the compresser to have..... Why???
They dont need to be oiled... they have a sump......[/b][/quote]

Actually Steve, they will still need to be oiled if the above modification isn't done, because they will bleed the sump oil into the system, as they're designed to do when used for air conditioning.

Not to be too pedantic here, but the Sanden type compressors do have a sump, with a sump plug, it's just that with the cylinders lying on their side, they will pass a lot more oil into the system. If you check the Sanden service manual, you'll find specs for the quantaties of oil required, depending on the mounting angle of the compressor, and you'll even find dimensions to build your own dipstick.

Another bit of misinformation that appears occasionally is that the refrigerant in an A/C system is the lubricant, and that is why an oiler is required for conversion to an onboard air system. This of course is quite incorrect, but since the oil charge moves around the system with the refrigerant, it's easy to see how the assumption was made.


Paul [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img]

[discowhite]

yes, there is mineral based and synthetic based oils, the latter can only be used for the new R134a gas. apparently if the r134a is used with the mineral oil the mix can be explosive!(good for inflating tractor tyres in one go [img]style_emoticons/<#EMO_DIR#>/laugh.gif[/img] NOT!)

i havent blocked the feed hole yet, i was going to ues a oil/air seperator
first. i have also seen the link you listed. to me it seams to be the hard way to do the mod! taking the head plates off is much easier, all thats
required from there is holymar or 515 loctite.

ive modifyed 1 sanden in the same fashion as the york, turning the
body into a sump. when i find another usable sanden i'll make a new
bracket and double mount 2 so i can re-install my A/C.

cheers phil.