Are huge brass screws Devilbiss 330 valve adjustment?

by Denis
(Mckinleyville, CA)

I took the valve caps off the top of my Devilbiss 330. There are huge brass screws (not really screws but slugs with slots in the top) under the caps.


Is there some sort of adjustment with these? Or do you just tighten them down?

Comments for Are huge brass screws Devilbiss 330 valve adjustment?

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Mar 09, 2016
Devilbiss 330 mystery
by: Doug in s.d.ca

Can you post a picture or give a reference to the parts diagram?

I suspect you're looking at plugs used on certain models, but can't be sure.

If you have not already found it, you can get parts breakdown here:

http://www.centrair.ca/old-devilbiss-330-pump.html

Good luck.

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