DeWalt nail gun leaks air when trigger is pulled
I had this issue on a Makita siding nailer. 1 week old, was working perfectly the day before. Checked that the piston wasn’t stuck, opened it to see if residue was affecting the o-ring; everything was fine. In frustration, I held the trigger down while pressing the nozzle against the material. After about 5 seconds the gun finally engaged. Working perfectly again.