I have a Robarts air pump and used it maybe 7 times or so,when pumping the system the other day it seemed as though a seal blew in the pump..lost all air,i took the pump apart and replaced the rubber o ring inside and it still does it..i put the whole pump under water to find leaks and nothing..well the air is leaking out the top by the handle..how can this be..the o ring is new!
The air system in the plane is tight and the gauge doesn't leak and like i said it's leaking out the top.
Does anyone know how to repair this?
Thanks