How difficult is it to pull the pinion valve off of the rack. There are two (2) Allen head studs and four (4) tubes. Can I liken this to when you pull the distributor out of an engine......Just make sure the Pinion gear goes back in exactly how it comes out. Is there any other complication with seal etc. or are they stationary inside the pinion valve housing?

Mine seems to have a small leak at the “O” ring where the two (2) parts mate with the two (2) studs on the rack.

Thanks

Softball60