For bulldozers to work in the field all year round, it is necessary to ensure that the bulldozers work stably and reliably for a long time, and maintenance work should be done in all aspects. Maintaining the hydraulic system of the bulldozer is one of the tasks.

　　Generally speaking, the hydraulic system of a bulldozer is mainly composed of three parts: 1: the main clutch hydraulic system, 2: steering hydraulic system, 3: working device hydraulic system

　　In the technical maintenance process of the hydraulic system, the characteristics of these different systems should be combined, and the technical maintenance of different standards and contents should be adopted to comprehensively improve the overall effectiveness of the technical maintenance. During the technical maintenance of the hydraulic system, the oil should be kept clean and clean, and the dirty oil should be drained clean in time. The main points of maintenance are as follows:

1. Choose the right hydraulic oil

   
   

　　Hydraulic oil plays the role of transmitting pressure, lubricating, cooling, and sealing in the hydraulic system. Inappropriate selection of hydraulic oil is the main reason for the early failure of the hydraulic system and the decrease in durability. The hydraulic oil should be selected according to the model specified in the manual. When a substitute oil is needed in special circumstances, the performance should be the same as that of the original brand. Different brands of hydraulic oil cannot be mixed to prevent chemical reaction and performance changes of the hydraulic oil. Dark brown, milky white, and odorous hydraulic oil is deteriorating oil and cannot be used.

　　2. prevent solid impurities from mixing into the hydraulic system

　　Clean hydraulic oil is the key to hydraulic system. There are many precision parts in the hydraulic system. The intrusion of solid impurities will cause strain on the precision parts and blockage of the oil passage, which will endanger the safe operation of the hydraulic system. Common ways for solid impurities to invade the hydraulic system include: impurities in hydraulic oil, dirty refueling tools, and desquamation of hydraulic components. It can prevent solid impurities from invading the system from the following aspects. When refueling, the hydraulic oil must be filtered and refilled. The filter at the refueling port of the fuel tank cannot be removed in order to increase the refueling speed. Fueling personnel should use clean gloves and work clothes to prevent solid impurities and fiber impurities from falling into the oil.

　　In the technical maintenance process of the bulldozer, the contents that need to be inspected every day should be published in clear and clear standards, and special personnel should be implemented, and the bulldozer operators should implement daily technical maintenance. Of course, in addition to this routine technical maintenance work, irregular technical maintenance should also be done to achieve the combination of regular maintenance and irregular maintenance. In the irregular maintenance work, we should focus on the technical maintenance of the hydraulic system.

　　In the maintenance process of the hydraulic system, dynamic and normalization should be implemented, focusing on the maintenance of the hydraulic system to reduce the failure rate of bulldozers.