foam-n-fibre wrote:I used to have a vacuum pump from a fridge compressor, and it had a bunch of oil in it, and seemed to give out a slight fine oil mist. After a while it died. I have a couple other compressors from the local scrap metal guy, and found one that seems to work. The only thing is, it does not seem to sound oily or spit or mist any oil at all. I suspect that this thing could have been lying on its side before I got it and that the oil all drained out. (This was too much of a shoddy operation for these guys to have actually drained the oil on purpose).
SO, the question is, do all fridge compressors show evidence of having oil in them? Should I add oil to this one? I have some compressor oil from an air compressor. Or do some compressors not need it? I would think they all need some kind of luubrication, and there's no way to check with a dipstick. Should I pour some in and see what happens? Or is it likely that I'm OK with what I have? I'm thinking I have more risk of it not working if I leave it without oil than if I add some. Sound right?
Bille wrote:Apparently the refrigerant used in these compressors has a lubricant
So -- i placed a one-way, (flapper-type Brass) Check-valve between the
pump and the holding tank . It seams to hold the Vacuum quite well when
the pump is off, so it must not leak.
I un-screw the top on the valve and spray 5-7 seconds worth of WD-40 in the valve, then
close it before turning on the pump. Hold your breath while spraying !!!
((use the red tube supplied with the can of WD-40 so it doesn't atomize in the air))
The air gets sucked From the tank To the pump, so
the oil never sees the tank. I direct the exhaust from the Pump out my window with a
plastic tube so i don't have to smell it. The order of the Epoxy goes out the window
as well, so once i got a seal on the bag, the work-room doesn't stink any more.
This pump has worked just Fine now for nearly 20 years , but i Never forget the WD-40
because i don't want to find another refrigerator compressor.
Usually these one way valves you are using have a rubber and/or O-Ring to seal. Your WD-40 will kill them after a while. So be careful there with your WD-40.
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