Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A technician is troubleshooting a dozer's hydraulic system where the lift cylinders are consistently slow. The system pressure, as measured at the pump outlet, is within specification (20,000 kPa), but the cylinder speed is significantly reduced. What component should the technician investigate first?
If system pressure is within specification but the actuator speed is slow, the issue is related to flow volume. A flow control valve that is improperly set or l
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Question: A technician is troubleshooting a dozer's hydraulic system where the lift cylinders are consistently slow. The system pressure, as measured at the pump outlet, is within specification (20,000 kPa), but the cylinder speed is significantly reduced. What component should the technician investigate first?
Answer options: ✅ Flow control valve for proper setting or internal leakage.
- Pressure relief valve for being set too low.
- Hydraulic pump for insufficient pressure output.
- Return line filter for being clogged.
Correct answer: Flow control valve for proper setting or internal leakage.
Explanation: If system pressure is within specification but the actuator speed is slow, the issue is related to flow volume. A flow control valve that is improperly set or leaking internally can restrict the amount of fluid reaching the cylinder, thereby reducing its speed. Pressure and flow are distinct hydraulic parameters.
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