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Old 07-17-2005, 06:27 PM
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air compressor maintenance

Hi there!
I've been readind the threads about compressed air for a long time, and I've seen lots of questions asked and ansewered but it seems to me that some people forget to ask about the maintenance that an air compressor should have.
I don't know how its around here but in my country most people don't give any maintenaince at all to their air compressors..
The oil from you air compressor should be changed before the time set by the manufacturer wich is usully something like 300 working hours. Another thing that most people seem to forget is that the and the vibrations from an air compressor working for long time, loosens the head bolts, so it's a good idea from time to time grab a torque wrench and retorque the head bolts to the manufacturer specs.
And about the belt on belt driven compressor you should remove the guard and take a look to see if it's loosen or damaged.
I only wrote this thread because sometimes people think that the only maintenance that an air compressor needs is to be drained.
I forgot to wrote that especially on older compressors you should take a look for corrosion in the tank, and if it's and old compressor maybe the best thing to do is send the tank to be pressure tested.
Never forget that compressed air is very dangerous.
I could talk a little about pipping and such but it has already been very well covered in previous posts.
I hope that my post is usefull, and that you guys add more important things about compressor maintenance and compressed air security. Because probably I forgot to mention a lot of stuff, and I don't all the stuff and I'm always willing to learn.

António Costa from Portugal
P.S.: Sorry for my bad English

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Old 07-17-2005, 08:47 PM
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Good point-And thanks for the reminder-
I think it's been about a year since my compressor got any attention.It's one of those things we don't think about until theres a problem-take it for granted until it quits.
Thanks,George
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Old 07-18-2005, 12:54 PM
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It´s always good to be helpfull, and I forgot to metion that there is another really important thing the air filter in your air compressor. You sould clean it regularly and change it when it's really dirt or at least once a year, especially if you have one of that filters made of foam. If clean and change you car's air filter why shouldn't you do the same to your air compressor?
My advice is to buy 2 or 3 filters for your air compressor to keep as spares, that way you won't be so lazy to go out to buy one when you see that it needs replacement.

António Costa from Portugal
P.S: sorry for my bad english
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Old 07-18-2005, 01:41 PM
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Capri-Right on every point! Most people don't worry about maintance until something breaks and you are giving excellent advice, now lets hope everyone listens!

BTW, your English is just fine.
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Old 09-12-2005, 05:14 PM
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Let me add a tip to this old thread, the best way to know how many hours as you compressor already worked (for example to control oil changes and such) is to put an industrial tipe hour meter between the pressure switch and the compressor electrical motor. If you wire it this way the hour meter will count only the time that the compressor is really working. This type of hour meters is quite used in many industries to control service time in machines including air compressors. And there some of this metters that sell for quite cheap (chinese crap...)

António Costa
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Old 09-12-2005, 05:53 PM
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when i bought my compressor in 83 the man who builds them told me to change the oil at least every 90 days. oils cheap and i do it about once every 60 days. 7 years ago i had the pump rebuilt while we built our new building. it was working fine when i tore it down. changing oil works. so does blowing out your electric motor every morning.
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Old 09-18-2005, 04:35 AM
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Very good advise. Something else to consider is the oil. I recently had to replace the pump on my compressor. Had I done regular maintenance, it would have likely lasted more than the 17 years it did. The new pump that I got came with very little information. It was made quite clear about one thing though. They do not use engine oil!

If the compressor is in the shop where you are doing grinding or body work, check the filter alot. Figure that the dust that you are creating, the compressor has to breathe.

Blowing out the electric motor is also important. When doing that, make sure to blow out the area where the capacitor is also. The dust will build up and cause them to short out. Been there, done that also!
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Old 09-19-2005, 03:38 PM
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I've heard to use only 30w non-detergent oil. How come I can't use, say 10w30 or just dump in some Lucas or Marvel and let it go. My compressor is an ancient refridgeration compressor fyi.
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Old 10-04-2006, 10:14 PM
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Compressor Oil Consideration

Cars will forgive you when you run your oil past the recommended changeout. Compressors will not. The difference is that in addition to carrying away heat and lubrication, the oil has the added function of having to handle all of that entrained air under extreme pressure. Oxidation of the oil is inevitable, and if the oil is not changed regularly, the oil will varnish the inside of the compressor, which will inhibit the unit from cooling properly. Change your oil at a regular interval, and only use compressor oil which is made to handle this extreme temperature, pressure and air entrainment.
CompressorProfessor
www.compressoroils.com
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