What is the solution for slow air brake return?

[OKylie]

The solutions for slow air brake return are: 1. There is a nut and screw on the sub-pump. Normally, the screw is retracted inside, and you can use a wrench to tighten the nut; 2. If the rear brake pump and electronic handbrake are integrated, this situation may occur if the handbrake motor is faulty. Stepping on the brake causes the motor to vibrate and work, indicating that the motor is stuck or the plug wiring has poor contact; 3. You can go to a 4S shop and have professional automotive repair personnel inspect and repair it. The air 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 is to be driven, the driver releasing the handbrake is an inflation action. A certain air pressure must be reached to push open the spring, that is, to release the handbrake, before the vehicle can be driven.