The repair and maintenance of road construction machinery is the guarantee for the completion of production tasks. Correct handling of the use and maintenance of machinery is a crucial issue in the mechanized construction of modern highway construction enterprises.

In recent years, in the mechanized construction of highways, our units have been managed in accordance with the principle of “use and maintenance are equal”. In the previous construction, only the mechanical use was emphasized, and mechanical maintenance was not emphasized. Many problems that were easy to find were ignored, resulting in some equipment. The small problems become big failures, and some are even scrapped in advance. This not only greatly increases the cost of mechanical maintenance, but also delays the construction, and some even cause engineering quality problems. In response to this situation, we have developed and determined the maintenance content of each class in the mechanical management, and urged the implementation. Mandatory maintenance for 2-3 days at the end of each month, so many failures were eliminated before they appeared.

There is a reversing valve in the asphalt mixing equipment, and there is no problem in general. Therefore, it has not been carefully understood before. However, in actual use, there are also ways to deal with it.

The fault of the reversing valve of asphalt mixing equipment is not complicated, that is, the commutation is not timely, the gas leaks, the electromagnetic pilot valve is faulty, etc., and the corresponding reasons and solutions are of course different. In the case of the reversing of the reversing valve, it is generally caused by poor smoothness, stuck or damaged springs, oil stains or foreign matter stuck to the sliding parts. It is necessary to check the state of the lubricator and the lubricating oil. Viscosity, if necessary, can change lubricants or other parts.

After a long period of use, the reversing valve is prone to wear of the valve plug seal, valve stem and seat damage, resulting in gas leakage inside the valve. In this case, replace the seal, stem and seat, or replace the reversing valve directly. In order to reduce the failure rate of asphalt mixing equipment, it is necessary to strengthen maintenance.