What is the primary function of a power steering pump?

The primary function of a power steering pump is to provide hydraulic pressure. This hydraulic pressure is essential for assisting the driver's effort in turning the steering wheel, making it easier to maneuver the vehicle, especially at low speeds or when parking. The power steering system uses this hydraulic pressure to amplify the force applied by the driver on the steering wheel, which in turn facilitates smoother steering action.

In contrast, adjusting the engine speed is not a function of the power steering pump; rather, it involves several components of the engine management system. Changing the gear ratio pertains to the steering gear mechanism itself and does not involve the hydraulic system directly. Additionally, while lubrication is necessary for the overall steering system’s operation, the power steering pump specifically is not responsible for delivering lubrication; its role is solely focused on generating hydraulic pressure for steering assistance.