Dewalt brad nailer trigger valce

[Kuecker2]

I have replaced the trigger valve and it still leaks at the trigger. I used lube and even tried the trick of putting tedlon tape under the o rings. is there any way to resolve this?

 

[WWheeler]

even tried the trick of putting tedlon tape under the o rings

This is one I've never heard before.

 

[The Cobbler]

teflon under Orings? not a fix . not a trick, a waste of time, IMO
you have something wrong, wrong size orings or you knicked them installing them, or something else .
where at the trigger is the leak, at the shaft?