Halfnut: The transfer pump you refer to must be the alternate pump. My"source" claims that it is the only connection between the two systems and that the left can operate, via the gear sump fluid (but with no right pressure indicated) the landing gear, right half of the nosewheel steering. From the right to the left, the left at reduced pressure (18--2400 psi), if the normal fluid in the right side is available over 2,000 psi., to go through priority valve (normally 1500 in cruise or 3,000 during approach, taxiing and until Climb Checklist, following "uplatch check"), to get to the non-priority items. A problem with whichever DC bus (rare) might affect the anti-skid, if left on after landing and the right DC Bus powers the alternate hydr. pump. Doubt that they also had such an electrical abnormal, or had a groundshift failure. The Aux pump powered by Left Gen. Bus, based on my information. Better go now. Don't want to look too sleepy in Sun. School.
...eing'schlohfe...