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Hi, I have a Master Fastener 2 1/2 inch (64MM) 15 Gauge nail finish nailer and used very little. When using it the other day it was firing intermittently. Another words, I would press the gun onto my trim board push down and when pulling the trigger you can hear air but it doesn't fire, or at least it did so everyother try and now it doesn't fire at all. There is no jam in the magazine. So not sure if it is just the trigger. Any suggestions?

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Hi Alan,

First, be sure you are using the correct nails for the gun. Using the wrong ones will cause it to misfire.
Second, check the nose to see if the pin/piston is bent.
If you have a nail jam this will cause it stop firing. The fact that the gun was misfiring and then stopped completely leads me to think that the pin might have bent and then a nail jammed because of that.

Usually, either the wrong nails or a jammed/bent drive piston is the problem.

Did you oil the drive piston? These guns need friction in the nose piece to operate correctly. Oil will ruin it.
Check the trigger pin to see if it is bent or broken.

Good luck!

Hope this helps. If it does, I'd appreciate a 4 thumbs up. Thanks,

Handie Andie

Posted on May 20, 2011

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