Ingersoll Rand SS5 slowing down to a crawl

by Rich
(PA)

New Ingersoll Rand SS5 air compressor (Photo: Amazon.com)

New Ingersoll Rand SS5 air compressor (Photo: Amazon.com)

My compressor starts up and run up to about 70 lbs before the motor starts slowing down to a crawl.


I have replaced , the head gaskets, cleaned the check valve, replaced the capacitor, and the starter cap. I’m still having the same problem.

I did find that I had some rust on the middle plate by the front valve. I cleaned it really good and installed new gaskets. Still the same issue.

Any ideas where to go to next? This is a personal use compressor for small tasks and installed in a climate controlled garage.

Comments for Ingersoll Rand SS5 slowing down to a crawl

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Jan 16, 2019
Centrifugal motor switch operation
by: Doug in s.d.ca.

Search "Centrifugal motor switch operation" and read all about it. Or watch a video.

"Once I hook it back to the compressor the problem starts back up."

Right. Which tells you one or the other is not working properly.

Jan 15, 2019
SS5
by: Rich - PGH

Where is that located at? I have tried running the motor for an extended period and it seems fine without a load.

I have run both the motor and pump with the discharge line disconnected and it runs fine also. Once I hook it back to the compressor the problem starts back up.

Jan 14, 2019
Motor caps
by: Doug in s.d.ca.

I understood you say you replaced both capacitors.

Have you checked that the centrifugal switch is opening? Might be welded.

Jan 14, 2019
SS5
by: Anonymous

The voltages are within spec. I took the check valve off and blew through it. One side allowed air to pass the other not.

As for the valve, they seem to open and close freely without any build up and seat properly. So, it seems fine to me. This did come on all of a sudden

Jan 11, 2019
SS5 slowing down to a crawl
by: Doug in s.d.ca.

"I have replaced , the head gaskets, cleaned the check valve, replaced the capacitor, and the starter cap. I’m still having the same problem."

That's most of the bases - the valves were ok?

Did you verify the check valve is actually working?

Have you verified the power into it is OK? what voltage at the motor (or as close as you can get) unloaded and near when it slows down?

Did you notice if this came on suddenly or gradually?




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