Hi, my oil burner is leaking. I can see a drip of oil coming from the hydraulic jack that operates the air shutter and this has accumulated substantially. This jack is located to the right of the burner as you look at it from the front. It's basically a little piston and i wanted to know is it difficult to replace. Looks like only one small screw securing it to the burner/air shutter. My boiler is a Firebird and the burner attached to it is a "Riello 40." It's about 10-12years old and i know it should be replaced but this is just a simple problem or so it seems! Would be grateful for any help.