When testing relief valves on fin stabilizers, to which manifolds should the gauge be connected?

Connecting the gauge to the T54 and T55 manifolds when testing relief valves on fin stabilizers is the correct approach. These specific manifolds are designed to provide the necessary pressure readings for evaluating the performance of the relief valves. By using T54 and T55, you access the sections of the hydraulic system that directly relate to the operation of the stabilizers, ensuring accurate measurements that reflect the operational characteristics of the valves.

The other pairs of manifolds may not be applicable or efficient for this specific testing purpose, as they could be linked to different systems or components within the overall hydraulic framework, making their readings irrelevant to the relief valve performance. Proper selection of the manifolds is crucial for obtaining reliable data during testing, which is why T54 and T55 are the correct choices.