What component of the hydraulic system is mounted under the vehicle on the inside right frame rail?

The main control valve is a critical component of a crane’s hydraulic system, responsible for directing hydraulic fluid flow to various actuators and hydraulic motors within the crane. When mounted under the vehicle on the inside right frame rail, it serves as the central command point for controlling the crane's operations, ensuring precise and efficient movement.

This placement under the frame rail provides protection from external elements, enhancing durability and accessibility for maintenance. Furthermore, being situated in this location helps minimize the hydraulic line lengths, reducing potential pressure drops and maintaining system efficiency.

The other components have specific functions that differ from the main control valve. Relief valves are used to prevent excessive pressure in the hydraulic system but are typically located where they can effectively manage pressure. The collector ring assembly facilitates the electrical connection for the crane's controls and is not part of the hydraulic system itself. Joystick manipulators are used by the operator to control movements but are not mounted on the vehicle’s frame in the same manner as the main control valve. These designations help clarify the distinct roles each component plays within the hydraulic system of a crane.