Hi friends! Dne’ here! My brother “Robo”, bought one of the oilless air compressor went out. He uses this compressor at his car wash to run his foaming brushes. You know, when you turn on the brush at a coin operated car wash, the foamy soap comes out? The compressed air makes this happen! Didn’t know that did you! ; )
I suppose that most oilless or oiless (however it’s spelled) air compressors work on the same principle, however, I’ve never opened one up to see what makes one tick! I’m intrigued!
When Robo first got this compressor, darn it was noisy, but did the job for a year. These are noisy compressors! The only maintenance would be draining the condensation or checking the air filter, other than that, there is no maintenance!
Here we go! we removed the plastic housing, and to my dismay, this is the pumping mechanism! “That’s it!” I say! I’ll have to say it’s kind of squirrelly! At this point, we had already taken it apart, I just re-assembled it for this blog.
Here’s the counterweight that makes this compressor run smoothly! ha! It would vibrate your teeth out! On the end the shaft here is the “connecting rod bearing” for lack of better description. This one is ok. It could run smoother is the machine was balanced and blueprinted! lol (seriously).
I think here is what may have short-lived this compressor. The air cleaner screws onto here(below pic). It’s pipe thread in aluminum and destined to wear and vibrate out. I asked Rob, “where is the air filter assembly?” Well, it’s nowhere to be found! However, these threads are stripped out and a new head had to be ordered.
In this pic below, the Teflon piston ring is the culprit of why it doesn’t pump any more! I figure that the Teflon ring wore out due to contamination, then devoured the cylinder wall ruining the cylinder.
However, one cannot just buy the Teflon ring, you have to buy the entire assembly(piston, rod, cylinder), and we had to by another cylinder cause ours was damaged due to the piston beating the hell out of it!
Sears parts is a pretty cool site, but I couldn’t find some of the parts online, so I called Sears. The really nice guy there helped me figure out what we needed. It came out to about 134.00, still cheaper than a new compressor!
Below: The new air cleaner installed~ I applied some red loctite so hopefully it won’t vibrate and fall off this time!
Well, we’re not out of the woods yet! The compressor isn’t holding pressure and sounds like it’s leaking at the pressure switch, but, see that brass fitting in the picture below? That is a one way valve to keep pressure in the tank. The plastic seating valve inside of it is worn and allowing tank pressure to leak back to the pressure switch and create unwanted head pressure! The leak is ultimately coming from this fitting! So, called Sears again, and ordered this 9.oo dollar part~ shipping was 12.00! ; ) If this fixes it, we’ll be good to go!
I found this compressor to be interesting! ; ) I love taking things apart to see what makes them tick! don’t you? I hope you’ve found this interesting as well, and please check out some of my other blogs~ hopefully there’s something that may help you! ; ) Oh, don’t forget to subscribe to Classic Cars and tools! ; ) dne’
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