Check hydraulic brake system integrity

When a constant force is applied to the brake pedal for 10 seconds:

• after the initial travel, the service brake pedal travels to the floor; or

• the brake system failure indicator comes on.

1. When the service brakes are firmly applied, less than 20% of the pedal travel remains (unless the brake system is designed for greater travel).
2. When soft pumping makes the brake pedal travel to the floor