Adjusting Air Pressure

Have a Ingersoll-Rand 4000 air compressor that I can't adjust the air pressure using the Knob. Is there another way to adjust air pressure?

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Bill wonders...?

Howdy, and thanks for writing in.

What knob?

I'm assuming you mean the knob on the regulator, yes? :-)

Here is the page about compressed air regulators, complete with photo and drawing showing the regulators adjusting knob.

If you are turning this adjusting knob, and the air pressure is not increasing or decreasing, here are some things to look at:

~is there air in the tank?
~has the knob been turned all the way and now can't turn further?
~what happens when you pull up or push down on the adjusting knob?

If you are turning the knob, if there's air, and nothing is happening, I suspect that the knob has been disconnected from the actual internal adjusting nut. By pushing down or pulling up on the knob, it may then intersect with the internal nut, and then work.

Or, the inside of the adjusting knob has been stripped, and now even though it's turning, the internal nut is not.

Or, the regulator has failed. (Unlikely).

How about a "heads up"? Did any of this help?

Cheers,

Bill