Saylor-Beall air compressor is running fast then slow

by sean
(sag harbor ny)

compressor is running fast then slow till 60 psi then really slow not gaining any more psi.

its an older model 5hp with an 80 horizontal tank. It was working great then i move it to a new location and this happened?
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Sean, it could be many things causing this problem.

The running fast and slow suggests that load is building up and slowing the motor.

The first thing I would do is drain the tank completely. Remove, clean and replace the tank check valve. Test the compressor. Any change?

Bill

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