If the trim rods and tilt rams are fully extended, where does the fluid go if the pump continues to run?

When the trim rods and tilt rams are fully extended and the pump continues to run, the fluid will be directed through the up-relief valve. The up-relief valve is designed to prevent damage to the hydraulic system by releasing excess pressure when there is no further movement possible in the system. When the trim and tilt mechanisms reach their maximum extension, any additional hydraulic pressure generated by the pump must be relieved, which occurs through this valve. This function helps to maintain the integrity of the hydraulic system and protects against potential damage that can result from over-pressurization.

Other options such as the down-relief valve and the pressure sensor do not play a role in this specific scenario, as the focus is on the action occurring during the full extension of the system. The reservoir does not receive the fluid in this case because the valve efficiently relieves excessive pressure without allowing fluid to overflow into the system's reservoir. Understanding how the up-relief valve functions is crucial for maintaining the health of hydraulic systems in marine applications.