Through the above analysis, it can be concluded that not all steering racks require hydraulic oil. Specifically, the steering racks of manual steering systems and electric power steering systems do not require hydraulic oil, while the steering racks of hydraulic power steering systems rely on hydraulic oil to provide steering assistance.

Chevrolet officially launched the power steering system in 1953. This time point is of great significance, marking an important step for Chevrolet in technological innovation. In 1953, Chevrolet's representative model, the Chevrolet Corvette, was launched as the brand's first two-seater sports car.

some manufacturers recommend replacing the steering fluid every two years or every 40,000 to 50,000 kilometers. Owners should first refer to the recommendations in the vehicle manual and follow their instructions for replacement.

Advantages of hydraulic power steering system: Provides stable and powerful steering assistance Sensitive feedback and precise control Strong adaptability, suitable for a variety of vehicles High stability and reliability Relatively low cost Disadvantages of hydraulic power steering system: Low fuel efficiency Large volume and increased weight Complex maintenance and many vulnerable parts Inferior control feel to mechanical steering High noise

Hydraulic power steering racks can significantly improve the controllability of trucks and reduce the labor intensity of drivers. For large trucks that are driven for a long time, hydraulic power steering racks make it easier to operate the steering wheel and avoid fatigue caused by long-term steering burdens.

The operation between the rack and the pinion depends on adequate lubrication. When the power steering fluid is exhausted, this lubrication function fails, resulting in excessive friction between metal parts and abnormal wear. The gear portion of the rack will be damaged due to direct contact, and eventually the steering rack will fail.

Mineral oil hydraulic oil is the most common type of hydraulic oil, which is mainly processed from oil-based oil products extracted from crude oil. They usually contain additives to enhance the anti-oxidation, anti-corrosion, anti-foaming and other properties of hydraulic oil.

if it is only a small leak, the vehicle can still be driven for a short distance, but it needs to be checked and the hydraulic oil added frequently. However, if the oil leak is serious and the hydraulic oil is lost quickly, the vehicle may lose the power-assist function in a short time, and continuing to drive at this time will bring great risks.

The cost of replacing the steering rack varies depending on the model. For Mercedes-Benz models, the cost of replacing the steering rack is generally between $1,000 and $2,500. This cost includes the cost of parts and labor.

The hydraulic power steering rack and the four-wheel alignment seem to be two independent systems, but their working conditions are closely related. Although the hydraulic power steering rack mainly affects the steering ability of the vehicle, its good or bad condition will also indirectly affect the performance of the four-wheel alignment.