I thought about the new seal simply being tight and needing to break in. I didn't do the reassembly of the cylinder, so I don't know how hard the ram was to re-install into the cylinder. The safety valve has three pieces and a housing.
- spring
- valve (long piece with a hollow nose at one end and drilled base at the other end)
- bushing (seat?)
- screw on housing

It looks like the valve nose should seat on the hole in the screw on housing - does this sound correct?