The manual override on a directional control valve is intended for __________ and not for ________?

The manual override on a directional control valve is designed primarily for testing purposes rather than for routine operation. The manual override feature allows operators to engage the valve directly without relying on power sources or automatic control systems, making it useful for testing the functionality of the valve or the overall hydraulic system. This ability to manually control the valve helps in diagnosing issues or checking the system’s integrity.

In contrast, using the manual override for routine operations is not advised because it bypasses the automatic controls that are designed to operate the system efficiently during normal conditions. Relying on manual overrides regularly could lead to inefficiencies, wear on components, or possible safety hazards if the system is not operated as intended. Thus, the clarification in the question highlights the intended use of the manual override as a tool for troubleshooting rather than a standard operational method.