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Topic Review (Newest First)
03-22-2010 11:41 PM
ChevelleSS_LS6
Quote:
Originally Posted by 65ELCMO
I'm a retired compressor mechanic. We had a compressor manufacturer do a oil test and 30 w non detergent come out just the same as compressor oil. Don't worry about it being clear or looking like motor oil. Get the cheep stuff from checker etc. works just fine. If it runs all day you should change it every 3 months. Home owner, once a year is good.

x2... I'm not a compressor mechanic, I agree with you though.
03-18-2010 03:45 AM
cobalt327 Wrong post, my bad.
03-18-2010 12:07 AM
Torque454 Yes, getting the correct size bushing was my recommendation also. That really is the best way to go.
03-18-2010 12:03 AM
TubeTek Unless you happen to have a large drill of the correct size and a 1/2 or 3/4 pipe tap laying around, it'd be a lot cheaper to go to a plumbing and piping supply house and buy a bushing of the dimensions you need. The current plug is probably either 1 1/2, 2, or 2 1/2" pipe on the OD. Bushings are widely available with any of those OD threads and most any ID pipe thread you could want.

Even if it has to be double bushed to get to the size you want, $10 or so should cover the bill. A decent quality 1/2" NPT tap and the corresponding drill is going to cost you at least 3X that much in import stuff, and $50 or more for domestic tooling.

One problem with attempting to drill and tap an existing fitting is that a lot of fittings on the market today are really poor quality from a metallurgical standpoint. Some of the worst are fittings used in high volume production products where cost rules over all else. You might be able to drill and tap the fitting you have, or you might rip the end off a $20 drill in finding out the fitting has hard spots in it.
03-16-2010 01:04 PM
Sinister The manual for my Campbell Hausfeld suggests either compressor oil or 10w30 synthetic. Running the synthetic because it's easier to get.
03-16-2010 10:51 AM
DanTwoLakes
Quote:
Originally Posted by smithkustoms
Do air compressor pumps use a special oil, Or normal motor oil?
If motor oil, Would their be any benefits or issues with the use of synthetics such as Mobil-1? And What weight is best to use?
My Sanborn compressor manual specifically said to use synthetic 10 W 30 oil in the pump. I just bought a generic synthetic, and it has worked fine.
03-16-2010 09:39 AM
cobalt327
Quote:
Originally Posted by smithkustoms
BONUS QUESTION: My compressor has a 80 gallon tank but only has a 3/8" outlet. The 3/8" threaded outlet is on a large (3-4") screw in plug like most compressors have. Can I drill and tap the 3/8" hole in the pulg for a larger 1/2" or 3/4" outlet?
If what you now have is actually 3/8 NPT, that IS large. If you're not familiar w/the NPT sizing (and skip this if you are), it's different than 'regular' threads like NC and NF.

What most guys will look at and call a 1/4" pipe thread is actually a 1/8 NPT. Same thing all the way up- the NPT size is numerically smaller than the size of the tap would lead you to believe.

That said, if you need to go larger than 3/8 NPT, the next up is 1/2 NPT. It's big. 3/4 NPT is BIG!



Quote:
Originally Posted by Marquita
In theory you could drill it, get a tap in, but have the tap fly across the room when you first use it. That would scare me slightly, but I'm particularly bad at that kind of thing. My main concern would be how to do it AND withstand whatever pressure is in the tank on an ongoing basis without anything breaking or leaking.
I'm puzzled about the highlighted comment above.

What I believe smithkustoms is suggesting, is to drill out and tap for a larger diameter outlet. The hole would be drilled w/the proper bit for the NPT tap to be used to cut the threads, then the larger diameter pipe fitting would be screwed into the new hole. There should be zero reason to "have the tap fly across the room when you first use it".

Maybe you're confusing "tap" for a type of fitting, as opposed to the tool that cuts threads?
03-16-2010 08:37 AM
Marquita
Quote:
Originally Posted by smithkustoms
BONUS QUESTION: My compressor has a 80 gallon tank but only has a 3/8" outlet. The 3/8" threaded outlet is on a large (3-4") screw in plug like most compressors have. Can I drill and tap the 3/8" hole in the pulg for a larger 1/2" or 3/4" outlet? Or anyone know where I could buy a plug with a larger outlet?
In theory you can dill & tap it but... Don't mess it up. In theory you could drill it, get a tap in, but have the tap fly across the room when you first use it. That would scare me slightly, but I'm particularly bad at that kind of thing. My main concern would be how to do it AND withstand whatever pressure is in the tank on an ongoing basis without anything breaking or leaking. Changing the size of the plug (converter) should be trivial if that's all you want.

Good luck.

Marquita Jensen
Bristol Compressors Comercial air compressors
03-14-2010 12:42 PM
stimpy the compressors we used on the boats used non detergent 30 wt , the detergent causes the rings and valves to coke up and the comprressor doesn't get hot enough to boil off the water vapor and when that combines with some of the detergents it makes a acid in the crankcase .
03-14-2010 09:18 AM
matt167 I gotta pump the oil out of my push mower.. it uses a second deck underneath, which covers up the accessibility to the drain plug on the engine.
03-14-2010 08:45 AM
cobalt327
Quote:
Originally Posted by deadbodyman
Every three months????? I better change my oil.
How many compressors are running w/the same oil in them that it was first filled with, I wonder?

Some people slay me w/their "set it and forget it" mentality.

Example:

Last Tuesday, I had brought out my lawn equipment to ready it for the upcoming season. I had neglected to change the oil in my push mower last fall- it hadn't been used but maybe three times, so I lazily had put it away as-was.

I had a pan of old oil sitting nearby and was refilling it when Don from next door idled up, beer in hand.

Nodded a greeting and continued my work. After about 5 minutes, he goes, "Watcha doin', Mark?"

I looked at him kinda funny, ans told him I was just sharpening some blades and changing the oil in the push mower.

Incredibly, he said- w/straight face, "You can do that?"

I like to have fell out. lol
03-14-2010 06:11 AM
deadbodyman Every three months????? I better change my oil.
03-06-2010 09:46 PM
65ELCMO
Quote:
Originally Posted by matt167
and compressor oil is just non detergent 30 weight oil
I'm a retired compressor mechanic. We had a compressor manufacturer do a oil test and 30 w non detergent come out just the same as compressor oil. Don't worry about it being clear or looking like motor oil. Get the cheep stuff from checker etc. works just fine. If it runs all day you should change it every 3 months. Home owner, once a year is good.
03-06-2010 09:07 PM
matt167
Quote:
Originally Posted by Raufus
Mine doesn't look like motor oil at all. It's almost clear. Why take chances?
it is produced a little diffrent, don't think anybody knows what the real diffrences are, but there small and many compressors run with regular non detergent 30 weight.. and compressors have been around longer than 'compressor oil' has..

that said, I do use compressor oil in mine, but it's what came with the compressor when I bought it.. havn't gotten to a change interval yet
03-06-2010 08:21 PM
Raufus Mine doesn't look like motor oil at all. It's almost clear. Why take chances?
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