400 cfm old jd engine not creating pressure

by Scott
(Bathurst nsw australia )

Hi there

I have an older sullair 425 cfm tow along

Starts fine, hit the button to give it blasting pressure, does nothing at all

its having trouble creating 30psi when usually im blasting at 85_90 any help will be grateful

thankyou

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Feb 20, 2017
almost no output...
by: Doug in s.d.ca.

Not a lot of detail here, but if it's like some, you may have a broken coupler that's dragging the screw. If you can rule that out, then maybe the inlet valve or load solenoid is sticking.

Is the engine revving when you ask for air, or is it running revved from startup?

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