Type wise the cx 36 uses a axial piston pump that puts out two separate flows of 10gpm each, then piggybacked to that a gear pump that puts out about 5gpm that supplies your swing motor and blade. Pretty sure that gear pump also adds supplemental supply to your boom and arm cylinders, it's known to be a good system. As far as OEM manufactures of the pumps they all seem to keep that somewhat of a secret but I think that 36 may use a Bosch/rexroth. Whatever brand of pump used as long as the hyd oil is kept clean, not allowed to overheat and run at a reasonable speed they should go for many hours.