It's not the cylinder - the pump looses pressure when it warms up. It goes from 700psi to under 500psi at around 150 shells. It's still up to speed anything over 500, but under it starts slowing down. It goes very slow on the down stroke. I'm not sure, but believe if the big nut on the pump is removed a washer can be installed to put more pressure on the spring. It's kind of like me - getting old and slow the more I do.
__________________
Paul Harm
|