First, adjust the free travel distance of the brake pedal, that is, adjust the length of the cable, and then adjust the angle of the brake arm. When necessary, clean the greasy brake helmet and brake shoe cloth. When the brake shoe cloth is seriously worn, replace the brake shoe cloth.

The braking system consists of control system, hydraulic system and booster system.

1. Control system: pedal, handbrake, etc.

2. Hydraulic system: It consists of hydraulic oil, brake pump and hydraulic oil pipe.

Hydraulic oil is the hydraulic medium used in the hydraulic system that uses hydraulic energy, and it plays the roles of energy transfer, system lubrication, corrosion prevention, rust prevention and cooling in the hydraulic system. For hydraulic oil, first of all, it is necessary to meet the requirements of hydraulic device for liquid viscosity at working temperature and starting temperature. Because the viscosity change of oil is directly related to the hydraulic action, transmission efficiency and transmission accuracy, it is also required that the viscosity-temperature performance and shear stability of oil should meet various requirements of different uses.