What percentage of drive axle pressure is typically delivered to the steering axle brakes below 40 p.s.i.?

In the context of heavy vehicle braking systems, the percentage of drive axle pressure delivered to the steering axle brakes at pressures below 40 p.s.i. is typically around 50%. This is crucial for maintaining balanced braking performance across the vehicle, particularly under conditions where the primary drive axle pressure may vary.

At lower pressures, like those below 40 p.s.i., the adjustment system for braking pressure prioritizes stability and safety by distributing some of the brake force to the steering axle. This ensures that the steering axle maintains adequate grip and control, which is essential for safe handling and maneuverability of the vehicle.

Understanding this percentage helps drivers recognize how braking systems function under various conditions and reinforces the importance of maintaining proper air pressure levels to ensure optimal brake performance.