Sanburn S51-AT22-80H oil bleeding thru oil filled plug

by Genna
(Hilliard, OH)

I have Sanburn S51-AT22-80H 80 gal. compressor .

When compressor turned on, it begin to shooting oil thru oil filled plug. It create air pressure in oil compartment.
________________
Genna, the compressor oil sump being full, and with oil blowing out the oil fill tube, suggests that the piston seals are allowing compressed air to blow by them, and into the oil sump.

I suspect it's time to tear down and service the pump.

Cheers,

Bill


Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Sanborn Compressor Issues.

Sanborn won't run

by Joe
(Louisiana)

Black Max 3 HP. Sanborn compressor won't run sometimes if I rotate motor it will start not always maybe 5% of the time. I've checked capacitors first off run capacitor checked bad and start capacitor was good changed run still won't start, changed start capacitor still won't run. Checked most connections I also unscrewed the line going to the tank still no start what else can I check I hate to ditch it now with the cost of the two capacitors
______________
Joe, it sounds like a combination of the capacitors and motor start windings. You've tackled the cap issue, now you have to look at getting the motor rebuilt. Consider taking it in to a motor rebuild shop... maybe even trade it in on a rebuilt electrical motor of the same size?

Cheers,

Bill

Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Sanborn Compressor Issues.

black max compressor stops building pressure

i have an 80 gal black max compressor: runs fine and builds pressure until it get to 25 lbs. at this point the motor/pump starts to slow down--then about 10 to 15 seconds later it will start running normal. the slowing down and running normal keeps happening.
______________________

Howdy. First thing, please check and see what else is operating on the same electrical circuit that is powering your compressor. Make sure all other current draws are off, and see if that makes a difference.

Your compressor motor is slowing because it may have a supply power drop, or something in the compressor air circuit is adding load to the motor, and this slows it down.

If air cannot flow easily from the pistons into the tank (valve in pump or check valve at the tank) the back pressure would increase the load on, and slow, the motor, and as that load decreased the motor would speed up.

It could also be a failing motor.

Post again after you have done some checks, will you?

Cheers,

Bill



Click here to post comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Sanborn Compressor Issues.