If the spring brakes are on, when should you push the brake pedal?

When the spring brakes are engaged, it is important to understand that these brakes are designed to hold the vehicle in place and to only be released when the driver is ready to move. Pushing the brake pedal while the spring brakes are activated is not advisable, as it can lead to unnecessary wear on the brake components and could result in a loss of control over the braking system.

Spring brakes automatically activate when air pressure drops, typically when there is a failure in the air brake system. Therefore, engaging the service brakes (by pressing the brake pedal) at this time could lead to ineffective braking and potentially hazardous situations.

Keeping the focus on proper braking procedures ensures the safety of the vehicle and its surroundings, emphasizing that the spring brakes should hold the vehicle and should not be interfered with by pressing the brake pedal while they are engaged.