Heavy Duty Equipment Technician Red Seal Exam Prep · Question
In an open-centre hydraulic system, what happens to pump flow when directional control valves are in their neutral position?
In an open-centre system, the neutral position of the directional control valves connects the pump output directly to the reservoir, allowing continuous flow at
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Question: In an open-centre hydraulic system, what happens to pump flow when directional control valves are in their neutral position?
Answer options:
- Flow is blocked, and pressure builds up
- Flow is directed to an accumulator ✅ Flow is bypassed directly back to the reservoir
- Flow is routed through a pressure reducing valve
Correct answer: Flow is bypassed directly back to the reservoir
Explanation: In an open-centre system, the neutral position of the directional control valves connects the pump output directly to the reservoir, allowing continuous flow at low pressure when no actuators are active.
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