Tootsall

Chances are that something came out of one of the tubes and into the valve where it temporarily lodged between the valve piston and the valve casing. Forcing the valve moved the offending object either into the top space above the piston (from which it will inevitably come back down and jam again) or down into the bottom of the valve casing.

Rinse, rinse, and rinse again and then reoil.


It happens.