In Reply to: Re: 641 Hydraulics posted by Tom on December 26, 2020 at 17:57:24:
Here is some Ford documentation. Unfortunately it is written for the initial version of the piston pump that used a double row ball bearing on teh wobble shaft. That version was quickly replaced with one that used a tapered roller bearing and had a needle bearing on the gear end of the wobble shaft for additional support. The basics are pretty much the same.
Piston Pump Shop Manual Supplement