After replacing a hydraulic power steering pump on a heavy-duty truck, the steering is still difficult to turn. What is the most likely cause?

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Multiple choice — select the best answer

ARelief/poppet valve requires adjustment
BAir in the hydraulic system
CIncorrect fluid type
DDamaged steering column

✓ Correct answer: A. Relief/poppet valve requires adjustment If the relief/poppet valve is not adjusted correctly after pump replacement, it may limit maximum system pressure, resulting in difficult steering despite the new pump installation.

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After replacing a hydraulic power steering pump on a heavy-duty truck, the steering is still difficult to turn. What is the most likely cause?

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