The parking brake lever is also called “handbrake handleâ€. It is the mechanism used to control the parking brake. Its role is to ensure that the locomotive is safely and reliably parked in place; emergency braking is performed in conjunction with the foot brake; it is easy for the locomotive to start on the slope. The initial position of the parking brake should be 70% of the full range of pulling the joystick from loose to tight. This requires accurate identification of the effective point of action. Park the vehicle in a quiet place, and slowly pull the operating rod from the relaxed state until it is pulled to the end. At the same time, it is effective to count the total number of touch sounds of the pawl of the joystick and the connected belt fan, and multiplied by 70%. Effect point. Park the vehicle on an uphill or downhill road, use a foot brake, pull up the parking brake lever to the effective point, and then release the foot brake pedal. If the vehicle is not moving or just starts to have a small down-buffering distance, it means that the parking brake has a significant effect; if the down-skid or down-skid distance is long, the brake disc clearance should be adjusted.