The fault analysis of the bulldozer hydraulic pump oil temperature is too high is as follows: 1. The oil temperature of the hydraulic system is too high Excessive oil temperature in the hydraulic system may be caused by dirty hydraulic oil, excessive wear or excessive use, resulting in poor viscosity of the oil, weakened adhesion, and thus an increase in oil temperature. At this time, it is necessary to check the hydraulic system, replace the hydraulic oil, and clean the hydraulic system. 2. The output flow of the hydraulic pump is insufficient Insufficient hydraulic pump output flow can cause insufficient hydraulic oil flow and create an overheated area in the hydraulic cylinder system, resulting in increased pump oil temperature. At this time, it is necessary to check whether the hydraulic pump is operating normally, check whether there is blockage or leakage, and deal with it in time. 3. Hydraulic oil pump suction air If the hydraulic oil pump sucks air or is polluted by air, the pressure of the hydraulic system will decrease, which will increase the friction factors in the system and cause the oil temperature to rise. At this time, it is necessary to check whether there is leakage or gas pollution in the hydraulic oil circuit, and eliminate the problem in time. 4. Hydraulic system overload If the hydraulic system is working heavily or for too long, it will cause the oil temperature to rise. Therefore, it is necessary to reasonably plan and distribute the load of the hydraulic system to avoid problems such as overload and excessive duration. 5. Insufficient hydraulic oil Insufficient hydraulic fluid can be caused by an oil leak or leakage. In this case, the hydraulic pump needs to output more power to ensure normal operation, thus increasing the oil temperature. At this time, it is necessary to check whether there is leakage in the hydraulic oil circuit, and replenish hydraulic oil in time to prevent oil leakage. 6. The hydraulic oil cooling system is abnormal The abnormality of the hydraulic oil cooling system may also cause the hydraulic pump oil temperature to be too high. If the radiator or fan in the cooling system fails, it will affect the original normal cooling effect and cause the oil temperature to rise. At this time, it is necessary to check whether the various components in the hydraulic oil cooling system are operating normally, whether there is damage or blockage, and deal with them in time. 7. Improper debugging of the hydraulic system If the hydraulic system is not properly debugged, such as adjusting the regulating valve of the hydraulic pump, causing the hydraulic pump to overload and other problems, it may cause the oil temperature of the hydraulic pump to rise. At this time, it is necessary to check whether the setting of the regulating valve is correct. If it is not correct, it can be adjusted according to the technical parameter manual of the hydraulic pump. Another situation is that the seals in the hydraulic pump are damaged or worn, resulting in hydraulic oil leakage or unstable system pressure, which in turn causes the oil temperature to rise. In this case, it is necessary to check whether the seal of the pump needs to be replaced, and to check and repair the hydraulic system. In addition, in the process of using the hydraulic system, the following aspects need to be paid attention to: 1. Reasonably plan the load of the hydraulic system to avoid problems such as overload and excessive duration. 2. Regularly inspect and maintain the hydraulic system to ensure the quality and cleanliness of the hydraulic oil. 3. Use the appropriate hydraulic oil, and select the appropriate oil brand, viscosity and other parameters according to the working environment of the machine. 4. Pay attention to the cooling effect of the hydraulic system and perform maintenance in time to ensure the normal operation of radiators, fans and other components. 5. When changing the hydraulic oil or maintaining the hydraulic system, follow the operating procedures and pay attention to safety. One additional point: the heating and cooling of the hydraulic system is an interactive process. When a hydraulic pump generates a lot of pressure, some of the energy is dissipated in the hydraulic fluid, which then lifts working elements such as gear pumps or piston pumps, generating heat. At this time, the hydraulic oil must dissipate heat through the radiator, and the hot air is discharged from the unit through the fan to balance the heat, so that the temperature of the hydraulic oil can be kept at a stable level. If the hydraulic pump generates a lot of pressure and cannot dissipate heat in time, it will cause the temperature of the hydraulic oil to rise. Therefore, we should not only consider the hydraulic pump, but also take into account the overall adjustment of the hydraulic system. In addition, we also need to understand some other failure manifestations and solutions: 1. Excessive hydraulic oil temperature will lead to the degradation of hydraulic oil, increase the wear of lubricating grease, and age the seals, which will lead to problems such as oil leakage and air bubbles in the hydraulic system. At this time, it is necessary to replace the hydraulic oil or perform system maintenance in time. 2. If the filter element of the hydraulic pump is clogged or excessively polluted, it will cause the outlet pressure of the hydraulic pump to decrease, resulting in an increase in the temperature of the hydraulic oil. At this time, the filter element needs to be cleaned or replaced in time. 3. The aging, wear or damage of components such as hydraulic cylinders or valves in the hydraulic system may also affect the normal operation of the hydraulic pump, resulting in an increase in the temperature of the hydraulic oil. At this time, the hydraulic system needs to be inspected and repaired in time. In short, the high oil temperature of the hydraulic pump is a common phenomenon of hydraulic system failure. When it occurs, we need to analyze the failure in time and take corresponding measures to deal with it. At the same time, during normal use, we also need to develop good maintenance habits and regularly check the hydraulic system to ensure its normal operation.