What is the result of positioning an engine HYD PUMPS switch to OFF?

Positioning the engine HYD PUMPS switch to OFF results in the fluid flow being isolated from the system components. This action essentially halts the operation of the hydraulic pumps, which means that the hydraulic fluid is no longer being pressurized or delivered to the actuators and other components that rely on hydraulic power. Isolating fluid flow is critical for maintenance and safety purposes, preventing unintended movements or pressure buildup in the system, which could lead to damage or hazardous situations.

In contrast to this answer, shutting down the engine would involve a different process, and merely turning off the pump does not activate the primary hydraulic system, as that would require the pumps to be operational. The mention of activating a backup hydraulic system would also not apply, as the OFF position indicates a cessation of fluid flow rather than switching to a secondary system.