The separator piston in the accumlator has bottomed out towards the nitrogen end of the accumulator with the nitrogen pressure maxed out at 2500psi. There will still be hyd system pressure on the other end of the accumulator (3000 psi).
Is there a mechanical stop for the separator piston where it is "maxed out"? Otherwise there should be a standing force (500 psi*area) trying to compress the nitrogen further, up to hyd sys pressure? But I am no expert
Thanks for the additional info about the 757.