Need help with John wood compressor

[ghsrider173]

Hello this was my dads compressor it’s been here since garage was built 1975 I ran it yesterday it started to blow air from underside of this does not stop until tank is empty I need help fixing and identifying this pump

 

[ghsrider173]

Any help whould be great I feel this has lots of life still in it

 

[The Cobbler]

blowing from underside...the tank?

 

[ghsrider173]

 

[ghsrider173]

blowing from underside...the tank?

No if u look at the picture looks like a nut sticking out with a aluminum line coming into the top of it air is blowing out the bottom of this

 

[ghsrider173]

 

[T444e]

John Wood just made the tank, they manufacture pressure vessels. The compressor was manufactured by someone else. The tag on the tank is the ASME build plate for the tank.

 

[The Cobbler]

I'm afraid I'm no help. it looks like it's part of the unloader for the compressor head. looks like a part missing .

 

[MacMcMacmac]

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The unloader isn't the problem. Your check valve is no longer sealing.

 

[ghsrider173]

Is this a easy repair and are parts available

 

[ghsrider173]

Where is the check valve located

 

[MacMcMacmac]

It is screwed into the tank at the end of the discharge tube. It might be in there pretty tight, but it should be an easy fix once you source the right one. It looks like you will need one with a compression fitting end. These should be easy to find. Amazon has them for about $20-$30.

It's possible a valve disc or spring has failed and gotten pushed into the check valve as well. That is a slightly more complex repair but easily done.

 

[TRWham]

If this happens while it's running, your centrifugal unloader is sticking. The unloader should hold pressure once the compressor is running and that aluminum line vents discharge pressure from the head through the unloader when the compressor is stopped to provide for unloaded start. The unloader mechanism is inside that bell on the end of the crankshaft.

If while it's off, then it is the check valve.

 

[ghsrider173]

Many thanks to all for helping me I took the check valve out very tight very large was nothing in it I could see cleaned it brake parts cleaner pushed on the plunger seem to work put it back in fired it up she works like it did no air coming from unloaded must have been a stuck check valve I have a positive I’d on the make and model thanks so much guys I didn’t want to give up on this the old girl watched me grow up many thanks again

 

[rburke65]

So…..who made the compressor?

 

[ghsrider173]

American Kellogg 331tv