Recent problems with my compressor - Router Forums
 
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post #1 of 10 (permalink) Old 12-04-2014, 09:58 AM Thread Starter
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Default Recent problems with my compressor

Three or four years ago my compressor developed a very slow leak so I bought a new pressure valve assembly off Ebay. When it arrived I took a good look at the compressor and decided that it looked like a big job so I decided to live with the leak. Come now to about a month ago and the compressor leaked as fast as it was pumping, the leak being under the pressure switch assy. so I assumed that the unload valve was leaking, well you would, wouldn't you. I dismantled the pressure switch and all it's connections and the unload tube but when I came to fit the new switch the tank thread was bigger than on the new switch. I managed to get an adapter locally and finished the installation, stood back proudly as I powered up the compressor, my jaw dropped as the symptoms were exactly the same!
It was now time for a Google search and I spent a couple of hours reading articles and forums which didn't help at all so I had a rest then went back to Google and altered the wording yet again and BINGO, the very first article gave a comprehensive description of how compressors work, the article also included a paragraph which read something like this: When air leaks as fast as it's being pumped, it is NEVER the pressure switch, it is always the check valve and went on to describe what is't for ( to release the pressure in the cylinder so that next time it switches on it isn't under load which could trip the circuit breaker or damage the motor) and to clean or replace it. Well, I couldn't get out to the shed to find where such a valve lived, I had never seen one. It turned out to be ar the rear of the compressor and I soon had it in pieces, it just consists of a thick rubber washer and a rather delicate spring. There was a deep groove just like one sees when replacing a leaking tap/faucet washer. Because I had the compressor for about 17 years I doubted that I'd easily get a replacement washer so I set it up in the metal lathe and held a piece of wood with abrasive paper glued to it against the rubber until the groove was gone. After re-assembly it all worked like a dream.
The above happened on a Friday and the following day my good friend John came round with a couple of bowl blanks for me and I happened to mention the drama I'd had with my compressor and he looked at me in amazement and told me he was having identical problems and had also replaced the pressure switch, but now had it ready to take to a repair shop! He couldn't get home fast enough to see if my fix would fix his. About a half hour later he phoned and sounded very excited because his compressor was now fully operational.
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post #2 of 10 (permalink) Old 12-04-2014, 12:28 PM
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Hi, Harry. Yep I've changed quite a few check valves over the years... typically not that expensive, nor hard to find, at least this side of the pond!

Powermate 1/2 in. NPT x 1/2 in. Tube with 1/8 in. Bleeder Check Valve-031-0060RP at The Home Depot

I have found that hand tools are the best choice when I want to make mistakes at a slower rate of speed.

I don't suffer from insanity. I enjoy every minute of it.
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post #3 of 10 (permalink) Old 12-04-2014, 12:52 PM
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Shhhhh!!!! darn it guys you're going to spoil it for everyone! << only kidding, of course! >>

That's how I got my compressor so cheap on craigslist. Of course, when I went to look at it I thought it was the pressure switch as well, because you really cant tell where the leak is coming from without removing 900 screws to get the plastic shroud off.

I didn't even have to replace it, I just had to clean all of the crap out of it and hit it with WD-40.

now I know where to snag one when it comes time to replace it.

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post #4 of 10 (permalink) Old 12-04-2014, 02:12 PM
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Harry I forgot all about that " release the air using the purge valve when your finished part" .
I gave it away because it was tripping breakers and when Mike fired it up the first time it blew a hole in the tank as it was rusted lol

I donít always insulate , but when I do .
Ok ,I never insulate
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post #5 of 10 (permalink) Old 12-05-2014, 09:37 AM Thread Starter
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This is a shot of the check valve in my compressor, the hex headed bung is removed and the washer and spring drop out.
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post #6 of 10 (permalink) Old 12-05-2014, 10:47 AM
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Thanks, Harry. You've probably saved a lot of us a lot of time, aggravation, and money. Jim
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post #7 of 10 (permalink) Old 12-05-2014, 12:14 PM
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Quote:
Thanks, Harry. You've probably saved a lot of us a lot of time, aggravation, and money. Jim
...and that my friends and fellow members is EXACTLY why so many of us are so glad to see that Harry has returned! Harry is SUPER-HELPFUL with sharing his helpful information!

Thanks Harry!
Otis Guillebeau from Auburn, Georgia

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post #8 of 10 (permalink) Old 12-05-2014, 12:22 PM
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Boy thats an old timer ,Harry, never would have guessed that was where it is hid. mine have all looked like Duane's picture.
Herb
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post #9 of 10 (permalink) Old 12-05-2014, 04:15 PM
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Originally Posted by Herb Stoops View Post
Boy thats an old timer ,Harry, never would have guessed that was where it is hid. mine have all looked like Duane's picture.
Herb
Been awhile since I've seen one with rubber hose also, Herb! In fact not sure I remember ever seeing that. Lot to be said for simple and easy to repair, though.

I have found that hand tools are the best choice when I want to make mistakes at a slower rate of speed.

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post #10 of 10 (permalink) Old 12-05-2014, 04:29 PM
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Been down that road...replaced pretty much everything before I got to the 'unloading' valve part. Ah well, ran like new with all that replaced gear!
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