Which of the following symptoms may indicate a deficiency of fluid in the power steering on the bus?

Explanation

Correct answer: Louder operation of the power steering pump when maneuvering the steering wheel with the engine on.

The power steering system operates on a hydraulic principle, and its key component is a pump driven by the engine. Insufficient fluid causes the pump to start drawing in air, which leads to air entering the system and a sharp increase in noise during operation. This symptom is most audible during a turning manoeuvre, when the power steering system is under the greatest load.

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