Which maintenance issue is indicated when a proportional control valve exhibits sluggish response causing hydraulic actuator overshoot?

💡 Explanation

When pilot valve orifice is contaminated, spool movement is restricted, because the force balance necessary for precise positioning is disrupted, leading to sluggish response and actuator overshoot. Therefore, a contaminated pilot valve is indicated, rather than accumulator pressure loss, viscosity issues, or cylinder seal failures, which manifest through different symptoms.

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