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It is from a Kobalt Pancake compressor, Model 02106410. Air is leaking out of it. There is a small hole in the center on the other side. Perhaps a 3/8" part. I am suspecting a cold start valve. But this appears to have no moving parts. And I have no idea where to get a replacement. Lowes is ZERO help. Yes I tried Internet searches. Edit: If I turn compressor on it's side, air stops escaping and it will hold If I return back to vertical.

Thanks

I’m pretty sure it’s a muffler silencer.


https://www.amazon.com/LICTOP-Sintered- ... Q6MG&psc=1

I suspect the model number you give is incorrect as no relevant results are found, and specifically https://www.ereplacementparts.com/ (along with other sites) don't recognize that model #

erplacement is great place and gives a picture of all the parts of a tool blown away from their assembled position, making it rather easy to identify a part by name and specifications.

edit: well they used to have a blown up diagram...apparently no longer (at least for the Kobalt compressor I tried to view), and your given model number lacks the D at the end...I'm betting Michaeldc is correct with his find

In general when I'm faced with this type of dilemma I take the tool in question to Construction Specialties (a local tool supply/repair shop) and I've never failed to have success of some sort. Point being, I'd be surprised if some such place isn't close to you.

I have to admit there are similarities here. Do they fail? Leak air? Because that is what is happening here. Weirdly, when I rotate compressor upside down, it slowly stops and then does not leak when returned to normal upright position. Water? Its worth

Pics below show the part's location (high pressure side), safety valve, and air intake. Its worth ordering those parts to see.

Intriguing; here is some info that was new to me anyway:

https://www.hengko.com/news/what-is-bre ... to-choose/

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Measure Twice,

Karl Borum

Pics above. Note that the sintered side is inside the line, not on the exterior. I'm still thinking it could be a cold start valve. I mean, why would one put a muffler on the high side? On the exterior, in the center, is a very tiny hole reminiscent of a cold start valve).

Edit: I did find that there was fluid on the inside, not much, but probably enough to temporarily plug the "valve" or whatever it is.

I did a fair amount of looking and I couldn't find a decent parts diagram even at Kobalt.

So just guessing from your pics and description.

That brass fitting with the porous core looks looks like a vent to me and I think it's supposed to pass small amounts of air.

If it screws into the side of a fitting going into the tank on the tank inlet, I'm betting the bottom part of the fitting screwed into the tank is a check valve and the vent is to bleed pressure off the pump after the tank reaches pressure.

If all that is correct, I'm thinking the check valve is worn or dirty and it is tank pressure leaking past the check valve and going to atmosphere thru the vent plug. It is probably always leaking a small amount of air whenever the pump is running, you just don't hear it over the diaphragm pump which can be pretty loud.

So the brass plug I think is doing it's job but the check valve is failing.

There is probably a ball with a spring in the check and maybe the spring is broken -- when you turn the compressor over the ball falls into position and stops the backflow and the air pressure holds it shut till the pressure drops.

Maybe take the air line off the fitting and probe down into the fitting and see if it feels like a spring loaded ball is at the bottom. Maybe the spring is broke too.

Just my 2c from a lifetime taking all manner of stuff apart to fix. I could be all wrong too but that's mighty rare . Good luck!

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Brian R, Wood Mechanic
N8ZED

I agree with Mike Colbert - looks like a muffler.

https://www.veneersupplies.com/products/Exhaust-Muffler.html

You are the winner! You were correct in your assessment. With the bleed valve (muffler) off, I ran the pump, kept my finger over the hole. With the pumped turned off, it was not leaking when I removed my finger! I stuck a piece of wire in there and hit something that released the air. When I withdrew wire, it stopped. So I am guessing a dirty check valve. Just as you described. Gonna spray something in there to clean it. The fluid that came out (very little) was dark brown and viscous. Thank you!!!!!

Ok, still not all well. I pulled the check valve. One of the pictures shows the C clip and the spring not fully extended. So the spring is weak or broken. Now I just have to find this part.

And there we have it. A broken spring. Whaa

Also be sure and empty compressor of all moisture yeah day. Moisture is your enemy with compressors.

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Some times you get lucky Mike.

If you can't find the exact part you can probably McGiver something with a plumbing T fitting and a nipple or 2 and even Amazon has brass check valves of a variety of sizes and configs.

Just do a search for "brass check valves".

Or look for a similar spring at a hardware store. edit -- That little spring probably gets a workout on a diaphragm pump, the spring must flex every motor RPM so probably 1700 to 3400 flexes per min. It should come with spares!

You might have to re-bend the tubing on the inlet side.

Good luck

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Brian R, Wood Mechanic
N8ZED

Check Valve is J0189610988

And Grainger has it. https://www.grainger.com/product/SPEEDA ... Air-810RC2. Even comes with that odd muffler.

Thanks all.

Mike