Sanborn compressor

[Craftsman86]

I got my 30Gal Sanborn compressor off of CL for $100 and about 2 months later I was looking at it air up and it was at 180lbs in a 155 max pressure tank. I grabbed the release valve and the compressor has not worked the same since. I think that I need a new pressure switch for it, but I also see where it could be a burst disk. Any ideas for how I can determine which one to purchase

 

[teletekman]

I got my 30Gal Sanborn compressor off of CL for $100 and about 2 months later I was looking at it air up and it was at 180lbs in a 155 max pressure tank. I grabbed the release valve and the compressor has not worked the same since. I think that I need a new pressure switch for it, but I also see where it could be a burst disk. Any ideas for how I can determine which one to purchase

I know on my 60gal Sanborn, when I got it from my dad after sitting for quite some time, mine would go way above what the tank was spec'd for. I found out that the Air Pressure Cutoff switch has a high & low adjustment where I set it to kick on @ 90psi & cutoff @ 120psi. Turning the high limit screw all the way it got damn near 140psi and was still going up.

I don't know exactly what yours has but it might be a place to start.

Post a picture of it including the Air Pressure Cutoff switch...

 

[Craftsman86]

Mine is now leaking air out of the on off valve. If I do get a new pressure switch would I still need t oget a burst valve for it? I ma going to try tonight and see if the thing turns on or not

 

[teletekman]

If that valve won't close on it's own then yes I would get it replaced. Those valves I believe are spring loaded and rated for a few pounds over the factory max pressure setting to keep it from getting to a catastrophic pressure level. Once it falls back within limits it should close on it's own.

 

[RECox286]

When the pressure switch says "I don't feel like working anymore" it is

time to replace the ******. If it suddenly does not shut the machine

down at the proper pressure, and is, in fact, way out of the ballpark, and

trying to adjust the ON/OFF settings doesn't work out, then you have to

conclude that its' service life is: over.

Uncle Bob