Which statement accurately describes the PTCU’s function regarding A and B hydraulic systems?

• A. It transfers hydraulic power but not fluid between A and B
• B. It transfers fluid but not hydraulic power
• C. It transfers electrical power only
• D. It does nothing to A/B hydraulics

Answer: (A)

The PTCU is designed to link the two hydraulic systems in a way that energy can be shared, not the actual oil. It allows hydraulic power from one system to drive the other system’s hydraulics, so actuators can be powered even if one side isn’t supplying normally. Crucially, the fluids stay in their own circuits and don’t mix, and there’s no transfer of electrical power involved. In short, it transfers hydraulic power between A and B while keeping the fluids separate.