Question about Dewalt Heavy Duty 2 Brad Nailer Compressor Combo Kit

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Hi I have a Central Pneumatic model 94667 air compressor that was working fine, now it will not shut off when it gets to the usual shut off pressure. thanks. George.

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On this particular issue, I agree with trpabc, given the description; you most likely need a new pressure switch. It's unlikely that it suddenly got out of adjustment, therefore a new one is in order.

nobody794:
I had the same issue you had, and after reading your post, I went down to my garage to investigate... Turns out the valves in the compressor are just simple reed valves, like on a 2-cycle engine, and my inlet valve had some gunk baked on it, which didn't allow it to shut all the way, giving me only 60 PSI. I cleaned all the parts with a wire brush, then polished the surfaces with 1000 grit sandpaper, and it runs like a new one again. :o) I don't think you can actually crack those thin sheets of metal...

Posted on Jul 13, 2009

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Make sure it is actually achieving full shutoff pressure. I had the same compressor and had a valve crack and the compressor would run nonstop but never got above about 40 psi.

Posted on Jun 18, 2009

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You probably need a new pressure switch.

It is possible that you can adjust or repair it also.

It is best if you unplug the compressor before working on the switch to prevent shock.

There is usually a nut on a threaded rod that forces against a spring.

If you have too much pressure, you usually back off the nut and it will shut off at a lower pressure.

On a single stage air compressor 110 - 120 psi or less is appropriate.



Posted on Apr 15, 2009

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94667 central pnuematic i have. need to know how to remove pressure switch from machine. the red button on top of switch will not come off. help please??? and thanks in advance for all help

Posted on Jul 04, 2011

  • Charles L Green Jul 31, 2011

    the red button does not come off. right next to it in a hole that is probably filled with gunk is a small phillips head screw. Loosen it and the whole thing including the red button comes off

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to that psi. you will have to replace that part, make sure to have make, model , serial# of compressor

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It should use 30 weight mineral oil, or 30 weight motor oil.

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