Awl--
This was mentioned in a thread on alt.home.repair. Never really occured to me. How often?? They mentioned 25 hours, which seems pretty quick. Got the Husky 26 gal, nice quiet cast iron compressor head.
Same question about oil filled vacuum pumps...
i
The oil change is done on high vacuum pumps because the oil used in those pumps will get contaminated and make it impossible to pull the vacuum that the pump is rated for. I was my job many years ago to maintain a high vacuum system used in vacuum deposition (sputtering) in the devopment of intergrated circuit manufacturing.
John
John, how would I know if oil is bad. I have this fun pump on cart
i wouldnt be surprised if this used a different kind of oil than my vacuum pump intended for HVAC use. how many microns is this rated at?
I could not get specs, it is called high vacuum pump, I would guess 1 micron at worst.
i
Kinney? They've been out of business for 40 years, I think. You think that pump is big? We had 2 Kinney pumps on our cyclotron that were the ize of a VW Beetle. Not the Beetle's engine, mind you, the whole CAR!
As for pump oil, if it looks very clear, just a pale yellow color, that is good. If a deep brown, that is indicating contamination, and it needs to be changed. Probably any mechanical vacuum pump oil will do. And, if you can't even see through the sight glass (VERY typical) then the oil probably hasn't been changed in eons!
Sheesh! Even **I** don't have anything THAT old! I managed to get a fully functional Welch 1402 dual-stage pump out of a dumpster at work.
Jon
No, they are still iin business, vacuum.tuthill.com.
That's quite amazing...
Cool. I have a small Welch for myself as well, 1 CFM, though not from a dumpster. Congratulations.
i
VERY interesting! I haven't seen a Kinney pump less than 40 years old, and I see a lot of vacuum equipment. Edwards, Leybold, Varian, Alcatel, etc. There's even a Kinney rep in St. Louis, I see, but they must not have sold much.
The dumpster diving has gone WAY down hill! I used to drag stuff home all the time. I got a bunch of Welch pumps, one was really trashed and I scrapped it. The best one I kept, another I cleaned up a bit and sold it on eBay. I got a 6" diffusion pump, too, and also sold that.
But now environmental health and safety is breathing down everybody's neck, and they don't put ANYTHING in the dumpster anymore.
Jon
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