Which outcome results when a hydraulic directional control valve spool sticks due to contamination?

💡 Explanation

When a directional control valve spool sticks due to contamination, the valve cannot properly direct the flow because frictional forces overcome actuator force, resulting in either unintended movement if partially stuck, or stasis if fully stuck. Therefore unintended actuator movement results, rather than thermal expansion, filter clogging or reduced pressure which involves alternative mechanisms.

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