air compressor worn out? or what?

[sircrunch]

I have a coleman powermate air compressor. It stands up about chest high I think it is a 27 gallon or so. It is an electric with pre-lubed bearings and requires no oiling (or so it says on the label). Here lately it has been really put to the test with all the cutting, sanding, and grinding with air tools on the project car... It used to go up to a certain pressure and then automatically stop, but now it stays on constantly, and never even gets up enough pressure to stop.... It goes up to 50 lbs pretty quick but it REALLY struggles to get up to 100 lbs and never really goes up above 100... If I'm patient enough to let it get up to 100 lbs, then use my tool, it only takes a few moments of tool use before the tool is going too slow again. I noticed the electric motor actually sounds louder than I remember it used to. There is no air leak, and the tank has been drained. Has anyone got any experience in repairing or rebuilding one of these?

[88GT]

Possible that it over heated from surpassing the duty cycle and the piston lost compression or something. 27Gal isnt really big enough IMO for die grinder use. I used to have a 30 gallon and painted a few cars with it in the room and it burned up and got louder as it was dying

[Preston Herrick]

Aren't those a diaphram type compressor - no piston? Maybe it's ruptured. Have you visited the Coleman site for info? http://www.buypowermate.com/category.asp?section=AC&subcat=ACP

[Phil V]

I agree with Preston, there is either a hole in the diaphram or an intake or exhaust valve is faulty. Take the head off and see what you can see.

[dcrog]

Depending on the set up it may have a cracked reed valve also. But I guess Phil covered that with the intake exhaust valve. :o

[always_fixn]

On most compressors there is a check valve between the pump and the tank. If it is not working there will be a constant back pressure for the pump to work against. Just a thought.

[dtnodya]

Also, check the tube that runs from the compressor to the tank. One time the tube blew out of the fitting on my compressor and caused similar issues to what you described.

[ghackett1]

I second the opinion on a check valve being the culprit, happend on my compressor. Took forever to fill up and kept getting water in everything. Changed the check valve and it was like brand new.

[ghackett1]

:D Sorry, I just realized how old the original post was.

[style]

:D Sorry, I just realized how old the original post was.


the average household cat eats 130 pounds of cat food per year.

[Len]

the average household cat eats 130 pounds of cat food per year.

Grow up! If you don't have anything to add then don't add anything.