1994 quincy 5 hp 80 gallon tank speed variation

by bob
(n.j.)

Compressor slows down then at time sppeds back up, at time can go hours and days withoutthis happening then next day froma startup 30 seconds or so slows down, not pressure related, read voltage at slowdown and have 240 volts on both legs help

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Feb 24, 2013
325 spped changing problem update
by: bob

to add on this i also checked out the amps when compressor speed slows down noticably.The amps are at 23 under full load and when the speed slows down i take a reading and appears amps doesnt change. This is strange I would have expected the amps to rise when the compressors starts it occasional slowdown. This has been going on for couple months, just want to get it resolved with just "changing part" and hoping for a fix .this is a 325. '
anyideas suggestions will be appreciated

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quincy air compressor model 230 stopped producing air

My Quincy model 230 stopped producing air.

I have removed the diaphram loaders, heads and valves.

The valves not under the diaphram loader very carboned out as well as the head on that side.

I have cleaned it all very well, reassembled the diaphram unloader valve, the high and low pressure valves and reassembled the head.

Also cleaned out all lines leading to and away from unloader valve which had quite a bit of debris in the D & B side of the valve.

The cylinders show no wear, the bottom end looks tight and in working order, but there is still no air build up.

At the drain valve I can feel some air but upon closing there is no pressure build up. What could it be?

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