What is the reason why the vehicle still cannot move after releasing the spring brake?

[StOwen]

If the vehicle still cannot move after releasing the spring brake, it may be because the handbrake has not fully returned to its original position. Below is relevant information about the vehicle spring brake: 1. Purpose: The spring brake method is mostly used in the handbrake systems of medium and large-sized vehicles. The handbrake system of such vehicles usually uses a strong spring to maintain a constant braking state. When the vehicle needs to move, the driver releasing the handbrake is an inflation action. A certain air pressure must be reached to push open the spring, which means releasing the handbrake, before the vehicle can move. Conventional braking involves the handbrake locking the drive shaft, while the foot brake involves compressed air entering the brake chamber to lock the wheels. 2. Composition: A regular air brake system consists of a brake operating mechanism, dual-circuit brake mechanism, central disc brake mechanism, brake, air compressor, etc.