Outer Limits 4x4 Board

i have a sanden 508 just pulled of my 4b and tested it all ok. what mods should i do before putting it back on and what oil should i run in it or use a high temp grease. as what other fittings should i use. i was thinking a high/low pressure 12v switch, non return valve, along with a tank and the usual air lines and fittings. thanks chris

i would mount the pressure switch or a safety relief valve as close as possible to the output port of the compressor, mine endless air recently spat grease up the lines clogging the hose. The compressor near crapped itself because my pressure relief valve/switch which was upstream about 0.5m could not recieve any pressure signal to turn compressor off.

also ensure all lines are high temp rated as they will blow otherwise

One of the most important things to have in this type of system, be it endless air, or home built, is a pressure relief valve. I have one, set for about 15 psi above the cutout pressure of the pressure switch.

can u use a stock air con pump as a compressor

indeed you can, but you will need to have an oil air seperator in the discharge line as it will spit the oil out. One bonus with the sanden is it has a seperate sump, which inturn keeps air and oil seperate.

GQSHORTY wrote:can u use a stock air con pump as a compressor

Ive got one in my 60 series at the moment, previously had one in a rangie (many years ago) and plan fitting one to my swb mav that i'm currently buliding up. they work fine I occasionally squirt a small amount of light oil or crc into the inlet. Suck the inlet air through a filter or plumb it into the air filter.

Can any body post a pic of a sandem for me
ive got two pumps niether look like the "CON...tinuouse air" pump in thier add.
One is from a falcon (bulky thing) with 2 pistons and a sump underneath,
the other is out of a toyota corola i found in the bush, has some strange set up inside looks like a cam of some sort.
I asked an air con fella but he wasnt willing to help. Probably cos i wouldnt prise the wallet outa the back pocket. Mind you he wanted $175 for a pump he reckoned would do the trick. I said "BLING F*&@#%G BLING!! Can buy ten from the bl##dy wreckers for that, with change "

The ford one (if it's square-ish) is prob gunna be a york.

Can't help you on a photo on the Sanden type but I'm sure you'll find one at www.sanden.com

Cheers maty Yep The square one is a york works well only trouble is shoe horning it into the small amount of space in the engine bay.
TY for the web addydidnt even think of looking.
SEARCH ENGINES ARE MY FREINDS. (somtimes)

So do u need to use a non return valve with the sadens??

crankycruiser wrote:So do u need to use a non return valve with the sadens??

No but it is a good idea, you dont loose air through the compresser valves and it doesnt run backwards, etc....
I have used a sandon for years now on grease, with a check valve after the pump, and a emergency relief set to 10% above max pressure (you dont want it to go bang) it is capable of putting out 200 psi easily....i control it with an electric pressure switch and use a fire extinguisher as a receiver....but next i will use an old 9 kg gas bottle, as it has its own relief in it and a water drain alll built in...
The good bit is when you pump up all 4 35's and your mate has one of his half done :-)
Andrew

dow50r wrote:..
I have used a sandon for years now on grease
Andrew

How did you "grease" the compressor? Did you just pull it apart and fill it with grease, or did you install a grease nipple?
I am very interested in how you did it, as I have a Sanden in the shed for "one of these days"!

I'm fine with the rest of the setup, I have been doing refrigeration for years!

Cheers, Dean

Tas_Dean wrote:

dow50r wrote:..
I have used a sandon for years now on grease
Andrew

How did you "grease" the compressor? Did you just pull it apart and fill it with grease, or did you install a grease nipple?
I am very interested in how you did it, as I have a Sanden in the shed for "one of these days"!

I'm fine with the rest of the setup, I have been doing refrigeration for years!

Cheers, Dean

Ok Endless air compressers are a sandon compresser (painted blue) with a greasenipple on the side....have a look in the 4b mags and you will see....takes 2 minutes to drilll and tap a hole for one, and i use a water trap down stream to catch the excess grease, as i luv to keep things lubed up.
Andrew

Hi,

Has anyone got a pick of there modified AC Compressor with the grease nipple installed so that i can see where to put mine.

thanks

Byron

Bazz107 wrote:Hi,

Has anyone got a pick of there modified AC Compressor with the grease nipple installed so that i can see where to put mine.

thanks

Byron

The sanden compressors have a drain plug at the bottom and a corresponding plug at the top. The endless setup just has the top plug drilled and tapped with a grease nipple fitted.

However it is much better to instead drill and tap the bowl of the oil separator you used and fit a swagelok (or similar) fitting and run a small capillary line back to the air intake.

a few of us ran sanden's on cruisers years ago before a/c was available and there was room to mount them on the engine.
you will need the compressor and appropriate brackets, very good quality high pressure hose from the compressor to the tank as it gets bloody hot and will split and blow off and frighten the shit out of you otherwise.
we used truck tanks from the wreckers, most had plenty of threaded ports and a drain fitting. You'll also need a relief valve, one way valve to stop the air blowing back through the compressor, pressure switch and on the tank outlet a drier/seperator to remove oil and moisture from the air.
I used to just stick some engine oil in the compressor every now and then, drain most of it back out of the tank and the drier.
As has been said usually supplies more air than most servo's.
If there is no room to mount a compressor permanently on the engine you can on some engines put a belt on to a spare pulley and mount the compressor on a suitable bracket where it can be fitted temporarily when air is required. Just tension it with an ocky, plug the line to the tank in and away you go.

I found a standard A/C hose from the compressor deals with the problem of heat.

I did too until age and heat took its toll, the resulting bang and woosh of compressed air made me think the engine had blown.
In my case the engine oil in the compressor obviously softened the rubber untill it just split and slid out of the ferrule on the crimped fitting.
We ended up using a piece of steel tube with a few coils in it as a crude intercooler to cool the air down before it got to the rubber which seemed to work. copper tube could be used but we felt it would eventually work harden with the vibrations and fracture.

I also run mine forward, from the compressor to an oil cooler, mounted in front of the radiator, to help cool the air before it heads for the tank.
Its worked faultlessly for about 4 years.