What is a common cause for low brake pedal height in hydraulic systems?

A common cause for low brake pedal height in hydraulic systems is worn pedal bushings. In hydraulic brake systems, the pedal assembly includes bushings that allow the pedal to pivot smoothly. If these bushings become worn or damaged, they can lead to play or excess movement in the pedal mechanism. This play can prevent the brake pedal from returning fully to its resting position after being pressed, resulting in a lower pedal height during operation. Proper movement and positioning of the brake pedal are essential for effective braking performance.

While other issues may impact brake system performance, such as fluid quality or line obstructions, they do not typically lead to low pedal height in the same way that worn pedal bushings do. For instance, weak brake fluid can affect the system's ability to generate pressure, but it wouldn't specifically cause a reduction in pedal height by itself.