During the hydraulic system test, what should the brake pedal height do when tested for one minute?

When testing a hydraulic braking system, one of the key indicators of its condition is the brake pedal height after a sustained period, typically a minute. During this test, the brake pedal should remain constant if the hydraulic system is functioning properly. A stable brake pedal indicates that there is no significant loss of hydraulic pressure, no fluid leaks, and that the braking components are functioning as designed.

If there were any leaks in the hydraulic system or issues with the brake components, the pedal height would typically decrease, indicating a loss of pressure or fluid. This situation would require further inspection and potentially signal a need for repairs. On the other hand, an increase in pedal height is not a normal response during this test, as it may suggest that there is an unexpected accumulation of pressure, and vibration would indicate potential mechanical issues.

Thus, a constant brake pedal height during the one-minute test suggests that the system is operating effectively, ensuring adequate braking performance which is critical for vehicle safety.