Heavy Duty Equipment Technician Red Seal Exam Prep · Question
In a hydraulic power steering system, what often happens when the steering wheel is held at full lock for an extended period?
Holding the steering at full lock forces the power steering pump to operate against a closed system, causing the pressure relief valve to open continuously. Thi
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Question: In a hydraulic power steering system, what often happens when the steering wheel is held at full lock for an extended period?
Answer options:
- The power steering pump will stop operating.
- The fluid temperature will decrease. ✅ The pressure relief valve will activate, causing fluid overheating and potential pump damage.
- The steering rack will seize due to excessive force.
Correct answer: The pressure relief valve will activate, causing fluid overheating and potential pump damage.
Explanation: Holding the steering at full lock forces the power steering pump to operate against a closed system, causing the pressure relief valve to open continuously. This generates significant heat in the fluid, leading to overheating and potential accelerated wear or failure of the pump and seals.
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