What is the primary method for applying balance brakes?

The primary method for applying balance brakes is through the use of the foot valve only. This method is crucial because balance brakes rely on the air pressure in the braking system to evenly distribute braking force across all wheels. The foot valve, when pressed, allows air to flow into the brake chambers, activating the brakes on all axles simultaneously. This helps maintain stability and control while slowing down or stopping.

Using the foot valve specifically allows for better modulation and control over braking force, which is especially important in heavier vehicles commonly driven by Class 1 truck drivers. Proper application ensures that the braking system is engaged efficiently, preventing issues such as wheel lock-up or uneven braking, which can lead to loss of control.

In contrast, while hand brakes can be used in some contexts, they are typically employed as parking brakes and are not the primary means for engaging balance brakes during regular operation. Also, electronic brake systems, although becoming more common, do not override the foundational principle of using the foot valve for balance braking in traditional air brake systems. The intention behind balance braking is to create a harmonious stopping action with the air pressure principles, making the foot valve the essential tool for this purpose.