Parking brake is what drivers often say “hand brake”, the brake through the hand brake valve control valve to control the rear wheel spring energy storage brake cylinder release energy to the rear wheel brake braking effect. The hand brake valve pulled back, the greater the angle of the valve after the control of the air pressure, that is, the lower the lifting pressure of the spring brake cylinder, so that the energy storage spring brake cylinder, the greater the rear wheel braking force. Control valve lever pull back, pull the end pressure lifting, spring brake cylinder maximum energy, Baotou beiben heavy truck rear wheel brake parts reach the parking brake to hold.
In order to ensure reliable braking, in the gas system in a Baotou beiben heavy truck accessories four circuit protection valve, the valve will air from the air compressor is divided into four four loop is independent and interrelated: they are the front brake circuit, the rear brake circuit, parking brake circuit and auxiliary gas loop. When Baotou beiben heavy truck parts, hand brake valve can not lift the brake release situation, should check the parking brake circuit. Parking brake circuit in the usual gas, because in the operation of the application of less, the corresponding condensate in the pipeline more.