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air conditioner compressor oil and my setup

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air conditioner compressor oil and my setup

Unread postAuthor: c11man » Fri Nov 27, 2009 6:20 pm

so i ordered that $20 compressor off ebay, received it today and have it all wired up. it works like a charm! but now my concern is if it comes with oil in already in it. it shipped with rubber plugs in the ports but when i tip the compressor to the side no oill comes out. so do you guys think that i need to add oil to it? i have access to the proper oil but i just dont know if i should add more too it

also if i do add it should i pour it in the inlet or outlet?

EDIT
i figured i post some pics of my set up
<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9285.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9285.jpg" border="0" alt="Photobucket"></a>
my extremly simple wiring set up, what you see i all there is. no other components besides the 30ft cord

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9282.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9282.jpg" border="0" alt="Photobucket"></a>
here is the setup on the the high pressure output. i have my female QD, gauge and bleed valve

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9284.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9284.jpg" border="0" alt="Photobucket"></a>
now this is what makes my pump diffent than most peopls setups. i have a male QD so that i can hook up a compressed air imput for faster pumping and possible higher pressures but im not sure if i will get any higher or not(i have no need for more than i can get on its own currently)
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Last edited by c11man on Sat Nov 28, 2009 12:00 am, edited 2 times in total.
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Unread postAuthor: jrrdw » Fri Nov 27, 2009 7:54 pm

Air conditioners get their oil from the freon. Don't confuse it with air 'pump' oil that's used in air compressors. 2 different things.
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Unread postAuthor: jmadden91 » Fri Nov 27, 2009 8:04 pm

So because it doesnt have freon as it is not in a sealed system, yes you should add oil and AFAIK, into the intake.
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Unread postAuthor: POLAND_SPUD » Fri Nov 27, 2009 8:29 pm

on fridge compressors you should add some oil from time to time as some of it leaks out with air.... and yea you add it through air intake - do it while the compressor is running - it will suck it in nicely

I use engine oil most of the time... but it might be too 'thick'... if you have one for compressors it should be ok...

you don't need a lot of oil... normally I add 5 - 8 cubic cm of oil with a syringe every two weeks or so (I used to add more but that was too much - most of it leaked out a couple of hours later)... you can use something else to fill it but syringes make this simpler and less messy...
if it's really empty you might want to add twice that amount but try not to add to much...

these things generate heat but I don't think you can burn the motor unless you really abuse it...
it really takes about 5-10 minutes for them to get slightly warm so if you add the oil you should be fine for a while

there might be some differences between fridge compressors and AC compressors, so you might want to wait for tech or ralph to post here - just to be sure
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Unread postAuthor: c11man » Fri Nov 27, 2009 10:31 pm

the oil i can get is meant for air conditioner compressors so its the right oil, and yes i know it will lose oil through the air so i will be replacint it every so often. but do you think that it was shipped with oil in it? and will anything bad happen if too much oil was put in the compressor.

EDIT:
i added pics of my set up to the original post
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Unread postAuthor: POLAND_SPUD » Sat Nov 28, 2009 4:10 am

IDK really... they might have got rid of some oil to prevent spilling but the parts are probably still lubricated... just add oil gradually until you see that it leaks through the outlet tube... that's true for fridge compressors and most likely it's true for AC compressors as well

I understand that you don't want to damage your compressor. However, for me their biggest advantage is the fact that they are throw away appliances... if you break one down you get a new one (but you still have all the fitting, gauges and stuff)... (not that I advise abusing them but I think you can start experimenting with more confidence)

ohh and BTW, that's a beautiful setup... have fun with it... don't forget that you can easily add an air reservoir/s... just make sure they are rated to 50 bar

ohh and the QC on the air input is really clever - not only you can test if it will increase flow and/or pressure but you can also use the compressor as a pretty good vacuum pump
(JSR posting 'penis pumps' in 4...3....2....1... :D )
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Unread postAuthor: psycix » Sat Nov 28, 2009 2:32 pm

I fill my fridge compressor with "compressor carter oil".

Nice setup!
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Unread postAuthor: c11man » Sat Nov 28, 2009 10:54 pm

i just though i would share todays work on the compressor

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9286.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9286.jpg" border="0" alt="Photobucket"></a>
the new compresed air in side, just added a ball valve fore easy control

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9287.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9287.jpg" border="0" alt="Photobucket"></a>
switch box mounted directly on the case for ease. the pump switch is the big one, and the small white one on the side is for the fan. both are wired seperetly so i can run the cooling fan when the pump isnt on.

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9288.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9288.jpg" border="0" alt="Photobucket"></a>
one veiw of the fan showing the mounting bracket at the bottom

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9291.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9291.jpg" border="0" alt="Photobucket"></a>
my very large and overkill fan that i had laying around, its a 120v ac fan and draws 20 watts IIRC.

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9290.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9290.jpg" border="0" alt="Photobucket"></a>
and an overveiw of my entire messy setup
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Unread postAuthor: POLAND_SPUD » Mon Nov 30, 2009 5:36 pm

wow it's getting better...

that fan is definitely going to help to lower temperate to some extent... (is it mains powered ? I mean.. is it 110 V AC ?)


what air hose do you use ? you might want to consider buying push-to-connect fittings and tubing....

I have about 30 meters of 4X2mm poly-amide tubing (working pressure 50 bar) and I am pretty impressed with this stuff - it's light, cheap and it has really high rating...
the only problem is its low flow but there is 6X4mm version as well (rated to 30 - 25 bar IIRC)

just make sure that it is polyamide tubing there several versions made from polyurethane but they are much weaker
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Unread postAuthor: daberno123 » Mon Nov 30, 2009 8:42 pm

What kind of fittings did you use to connect to the input and output ports?

I ordered the same compressor but couldn't figure out what fittings were supposed to be used. I ended up just using epoxy to secure a 1/4" brass nipple to the output port but the epoxy starts to melt after the compressor runs for a little while, causing it to leak.

BTW, I successfully took mine up to 1000 psi filling up my hose (about 3 ci) in only a few minutes.
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Unread postAuthor: c11man » Sun Dec 06, 2009 11:01 pm

yes the fan is the 120v and it has some crazy flow. i have 2 of them and they were orriginaly bought to cool large drive cases at my dads work

currently i have no hose for it but as soon as i order from mcmaster i am getting 25ft of nylon tubing . where did you get your tubing from because it sound like a pretty good opption.

and daberno, for the output i took a 3/8 compression fitting, and drilled out a small peice of 3/8od copper so that it fit over the copper that was already there. it took quite a bit of tightening but it not has a solid air tight seal.
also you do realize that the entire shell is pressurized not just the hose, you were realy filling a bit over 10cubic inches
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Unread postAuthor: POLAND_SPUD » Mon Dec 07, 2009 4:45 am

I got it from here... this type of tubing and fittings are a kind of standard in pneumatics these days so I am sure there are lots of shops selling it

you can see it used here in my videos there...
as you can see it's really thin (4X2mm) so its flow is lower than that of standard hoses.
However, it's not a big deal if you want to fill single shot guns with it, but at full auto it might not keep up

anyway you might as well use larger tubing... 6X4mm should be fine IMO

just make sure that you check pressure rating before buying as there are hoses from different materials and not all of them are rated that high...

you might find them at mcmaster
http://www.mcmaster.com/#catalog/115/110/=4tpz8n
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Unread postAuthor: c11man » Mon Dec 07, 2009 5:04 pm

i cannot order form the site you linked becasuse its the wrong country :(
also mcmaster does not have the exact hose you have but a nylong equivilent, the only thing is that the push connnect fittings are only rated to 300psi
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Unread postAuthor: VH_man » Mon Dec 07, 2009 5:12 pm

a surplus store by my house sells those fans by the bucketload....

Also, Any thoughts on putting a heat sink in? It would help decrease heat.
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Unread postAuthor: POLAND_SPUD » Mon Dec 07, 2009 6:20 pm

its the wrong country

yeah, because it's in poland... :wink:

I don't know too many American shops selling pneumatics, maybe others could help?

I have some all brass fittings rated to 50 bar... the tubing I use is rated to 56bar
http://www.elektro-automatic.com.pl/gra ... y/PA12.pdf (sorry I am linking to data sheet from the shop where I bought it, so it's in polish...
pressure rating is in the first table - the last two columns are burst pressure and working pressure in bars)

ohhh I've found the manufacturer's site
http://www.mactubi.it/eng/home.htm
and their newer data sheet there... IDK if it's teh same product as pressure ratings are different
http://www.mactubi.it/download/pdf/GN1Gxx1Z%2012_en.pdf
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