r/AirCompression

Howdy, this is my first experience with a wheelbarrow style compressor, I’m the most mechanically inclined in my crew so I’m taking care of it.

We get it started and it seems to run fine but 9/10 times it will build up to about 120 psi and then dump everything at once out of the red valve and not allow itself to build pressure back up.

I’m assuming it’s a bad pressure relief valve? The occasional time it will run normally and keep pressure for a bit, the air gets let off in out the green

Replace the red valve?

Posted a few weeks back, with a compressor fault. That one was rectified. We had a technician come out to repair the previous issue (filter housing leak).

Same compressor, this time I noticed a loss of air from a component in the above picture. The air is coming from the lower part underneath.

I've noticed the compressor runs a lot, and loses pressure constantly after hitting max, it's also been burning through oil numerous times.

The company I work at said they've had it serviced this year and had to top oil up at least 5 times this year.

I was given a faulty air compressor from a friend as a tool to try and fix to keep if I can get it running. It’s more or less brand new from what was explained to me. it will run up to about 95psi and then sound like it slows down / struggles, but will reach 120psi and cut out. The issue is when you use the tool, it does not automatically start back up once the pressure drops. If it runs down below about half way I can flip the switch off / on and it will run again, but it won’t turn back on if it’s a higher psi. Basically it works as long as you just fill and drain and then manually turn it back on to refill once the tank is empty.

Any ideas what I can do?

https://youtube.com/shorts/kBB3BvlnvTM?si=bXmR2QS6Hvp9g7Ls

Elgi en15 with 19k hours. Unknown life before I acquired it sight unseen from an auction. It has two dead fans, totally seized, I'm thinking they could have caused the oil to overheat and possibly ruin bearings inside the machine. The third fan is working, but wobbly as hell. Does this sound like a compressor that can be saved, or am I looking a total rebuild of everything, and a motor replacement? It blows air great, going to hook up a gauge tomorrow to see how fast it fills the tank, but with the valve open, the air output is nothing to complain about. Very loud, which obviously a screw shouldn't be.

I'm now writing this as a reference for anyone in the future maybe searching and trying to find this unloader line or exhaust tube or a similar. There's pretty minimal info in a search.

So this is an M10 or M10-1.0 SAE flare on the tank check valve. It's smaller than 1/4" flare but larger than 3/16" flare. The outside of threads measures 10.36mm.

But now where to find an M10-1.0 SAE line flare nut

It's on an ALL Power APC4005 Twin stack Contractor Style air compressor. I believe also sold under Sears, Lowes, Strikeforce and others somewhere around early 2000's or so. They don't sell compressors anymore and only a few random parts left from later models. I think they may have closed up. Emails don't go through phone numbers don't work. This one I believe was sold at Advance Auto Parts from what I could find in searches.

I need to add the unloader line from this tank valve up to the switch since it's not there anymore. I bought the thing for a whole $10...but guy didn't know much about it. Thought if ya put a cap on there it would fill. He stuck his finger over it and it started filling. The pressure switch end seems to be a fairly common M10-1.0 inverted flare that I can work with.

This is actually kind of a nice design unit with wheels and a moving handle. Otherwise it's nothing special but decent output at 4.2CFM u/90PSI. I knew the frame/tanks was worth it with the design etc. Or the motor runs so would be a good replacement.

Solution

Took a while in researching but on Amazon I found a "TopHomer Air Compressor Exhaust Tube Aluminum Plated Copper, 6mm Diameter, 1-Way Flow, 470mm / 18.5in Central Pneumatic Compressor Parts (470mm / 18.5in)" That fit well has M10 on the SAE flare end then has 2 extra nuts for the other end that are the M10 with a 12mm wrench nut, then I believe an M12 nut that is a 14mm wrench nut. The line is 1/4" and copper coated alum.

There's also a "UXCELL 10mm Hex Nut 200mm Length Air Compressor Exhaust Tube Copper" or 8" long on Amazon for about $8. It is a 1/4" line and has the correct nuts on each end. It just ended up being a bit too short. But I can work with that. I need about 3" longer or 11" 280mm. The nuts are the harder part to find. The key search terms I think are Air Compressor Exhaust Tube or M10 Pilot valve line, in a search they show on Alibaba and all over in links. Just have to find the M10 and length. But I have brake tube I can use. Or just make a new flared end section to add to the valve end of a union, swap the nut and it's done.

I talked to a service shop and they suggested Makita compressors are normally metric. I also found the same looking M10 check valve listed on Ebay for Central Pneumatic. So maybe some searching for the line for one of those can yield some info if one is searching. They only offer and service a small brand list. They can't really source individual parts very well without part numbers. We agreed it's likely so ya can't just put random parts on.

I bought this golf cart and the owner said that the previous owner had a compressor for the shocks. I am looking to add a compressor and a release valve so i can raise and drop it. There is also a gauge and switches on the steering wheel that dont work. Any suggestions??

Have you ever seen a 200hp melt a coupling like this? Just putting out a post to break up the monotony of people posting home depot pistons

Found this 50$

Recently changed the oil in this compressor and it developed a leak a month later. It is a fairly new compressor. Any help would be appreciated. I can't figure out where the leak is really from

Got a new Tool Shop Air Compressor and the couplings that I’ve attached to a hose and nail gun seem to not be a good fit. There seem to be leaks at both ends. Wondering if the issue is the kind of couplings I have.

Our newest compressor is a Quincy 731 from the 90's. After years of the maintenance staff telling management our compressors are dying, they finally pulled the trigger.

7 of these bad boys! Kaeser 130's and 150's. New storage tanks, too.

I’d like to make a split line wall mount for this compressor. One for tools, other for paint. Can I run the line to my garage or would it be better to build it inside the compressor shed? Anything else I should know before I give it a shot?

Got this bad boy for $100CAD. Coleman Powermate. 20 gallon, 3HP, 5CFM. Looks rough but the guy took relatively good care of it. Just purchased a house and want to be able to run air tools for renovations and I also do most of my vehicle maintenance so it will come in handy.