I think Tinwacker has the answer, our AMM still states the following
SUBTASK 29-11-02-210-003
(7) Make sure the HYDRAULIC SYSTEM PRESS C indication, on the EICAS maintenance page, is
2800 to 3200 psi.
However for the Engine driven pump it states
SUBTASK 29-11-05-210-005-002
(4) Make sure the L (R) HYDRAULIC SYSTEM PRESS indication on the EICAS maintenance display
is 2900 to 3200 psi.
Perhaps this is where the confusion comes from also?