Thanks for the post!

By the way, I've attached the manual for this Nailer below, which does have some helpful trouble shooting info and a full parts breakdown with parts list.

As for nailer not driving a nail when it operates, this is probably due to either 1) wrong type of nails or 2) the nails are jammed in the magazine or the ribbon spring that puts pressure on the nails is defective.

If air constantly leaks out of the trigger area when you connect the air coupler to the nailer, most likely there are leaky seals/o-rings on the trigger valve/mechanism causing this.

I would remove the trigger valve/mechanism and check all o-rings for tears and damage. Make sure all seals and o-rings are properly lubricated and there is no debris/grit on any of the components. The nailer may just need a good cleaning.

- MTR

Did you remove the o-rings in the trigger and inspect them? Typically trigger leaks are due to these specific o-rings.

Also, if it has not been used in the past few months from the previous project, sounds as if the o-rings have shrunk due to drying out, thus not allowing the head valve to operate properly which would cause the symptoms described.

Lack of use is the worst thing you can do for a nailer. They need to be pulled out, a couple of drops of oil inserted in the end and fired every month or so.

- MTR