Question 1 of 27070
Q
Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?
A
The reservoir would become vapor bound.
B
The valve would be placed in hydraulic lock.
C
The spring loaded relief ports would open.
D
The buffering chambers would be unable to function.
Question 1 / 270705eccef9cbacbc34ba4d45928
Question 1 of 270705eccef9cbacbc34ba4d45928

Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?

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Question 1 of 27070
Q

Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?

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🔍 Key Concepts

• Function of an internal drain in a hydraulic spool-type directional control valve • Meaning of hydraulic lock in a cylinder and what causes it • What happens when fluid cannot escape from a closed space in a hydraulic component

💭 Think About

• Think about where the internal drain passages normally lead and what they are supposed to remove from the valve body or cylinder ends. • If those passages are blocked, what happens to any leakage or trapped oil when the spool tries to move and the cylinder needs to shift direction? • Which one of the choices describes a condition where trapped fluid cannot move and physically prevents motion?

✅ Before You Answer

• Identify the primary purpose of an internal drain (is it for large flow, leakage flow, or air removal?). • Decide which component would be directly affected first: reservoir, valve movement, relief ports, or buffering chambers. • Match the consequence of trapped, non‑compressible fluid to the most appropriate option in the list.