Question about Campbell Hausfeld 2" 18GA Brad Nailer

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Driving pin won't reset

I have a mastercraft nailer/stapler ..... the driving pin does not reset after the first staple ..... is there a spring perhaps, in side the housing that has come off? ... can't think what else it might be .... at this point the pin just slides back and forth with no way for it to reset above the next staple in the loading chamber

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The check valve is what causes the pin/driver to return to top of cylinder. To check if it is in place, remove the cylinder from the gun and look for an oring/band installed on a groove. This groove should have vent holes drilled thru the cyl. Holes should be clean. Any oring or rubber band can be used here. Just tight enough to stay in place. Other things to check:
Pin/driver should fit snuglly enough to hold it's own weight in cylinder. If your gun uses a plastic ring, it may be replaced with a rubber oring. Just make sure that the piston travels freely but holds its wieght.
There should be a bumper and a washer in the lower part of the gun. The bumper should not have any cuts or missing pieces and the washer should fit snuggly around the driver blade to prevent air from leaking down thru bottom of gun. If air is leaking down thru bottom, there is less pressure to push driver up. Email if you have more questions, good luck with your repair.

Posted on Feb 23, 2009

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