One of our relatively new (< 2 years) Jabsco hand-pump heads has developed an annoying quirk.
Set to "wet bowl" it works fine.
Set to "dry bowl" the up-stroke works fine, but pressing down offers stiff resistance like you're fighting either a vacuum or trying to compress something. Forcing it down slowly against the resistance for one or two strokes frees it up. After that, the bowl pumps dry with little resistance, as it always had (and as the other, identical pump, always does.)
I know these are simple devices, and I also know the position of one of the little flappers inside could make all the difference. Backing out four screws takes off the top of the pump, so that's not difficult.
What I'm pondering is, when I get in there, what should I be looking for?
Set to "wet bowl" it works fine.
Set to "dry bowl" the up-stroke works fine, but pressing down offers stiff resistance like you're fighting either a vacuum or trying to compress something. Forcing it down slowly against the resistance for one or two strokes frees it up. After that, the bowl pumps dry with little resistance, as it always had (and as the other, identical pump, always does.)
I know these are simple devices, and I also know the position of one of the little flappers inside could make all the difference. Backing out four screws takes off the top of the pump, so that's not difficult.
What I'm pondering is, when I get in there, what should I be looking for?