View Single Post
Old 02-10-2018, 02:14 PM   #1
Forum Supporter
mitchntx's Avatar
Join Date: Jun 2006
Location: Granbury
Posts: 2,173
Air compressor woes

For the last few months I've been noticing my 20 year old air compressor seems to be a bit sluggish. Takes forever to recover and cycles on really quickly.

During the cold snap in december, I had a drain line freeze and bust. As with my luck, it was on the pressure side of the ball valve. I don;t know how long it had run with a minor air leak. Changed the oil while I was in it.

Got that fixed and noted the cut-off air pressure was 135psi.
Adjusted the cut-off and recover pressures. to 120 and 85.

A few days ago, I was headed to work and heard an awful screeching noise from the shop. Ran to the breaker box and killed the compressor. Great ... compressor is toast.

I looked on-line and it would take $12-1500 to replace it.

I checked the oil. It was clear and clean.
I removed the belt and spun the motor up. It ran smooth.
I spun the flywheel. It was free and easy to move. I could hear the compression stroke and the puff of air.

Only thing left is the switch, cut-off assembly. That would attribute the sluggish recovery which was actually over-pressurization.

The switch arrived today. I had to cobble a few lines and fittings together as it wasn't like for like. Wiring was different and was just one trip to the hardware store for a new relief valve and some compression ferrules.

Seems to work as before. But as a precaution, I'll probably leave the compressor breaker shut off till I can spend a day out there and have a chance to cycle the compressor a few times.

Best I can surmise is that the screeching I was hearing was either the belt slipping on the flywheel straining against the high pressure or the bearings inside the compressor itself for the same reason.

I don't hear it now, thanks goodness.
KTM 1290 Super Adventure
... and a some others
mitchntx is offline   Reply With Quote
Page generated in 0.04269 seconds with 9 queries