Pump pressure
I am assuming that the first manual is the Boeing Aircraft Acceptance Manual and would have harder values for you the customer.
The Maintenance Manual values would be the extreme limits, so when 2800psi is OK but one psi below and your pump is now requiring replacement. Not so good if you just had the aircraft delivered.
I would have thought that the upper value was too high to accept as well.
Might be totally wrong but going to double check with our B777 acceptance and AMM.
TW