As an important equipment in the field of construction machinery, the normal operation of the transmission system of Liugong loader is very important for the performance of the whole machine. As the "blood" of the transmission system, the selection of transmission oil and the control of the amount of addition cannot be ignored. Before answering this question, we must first make it clear that the amount of transmission oil added is not static, but is determined according to the specific model, working environment and working load of the loader. Therefore, it is recommended that users refer to the instruction manual of Liugong loader or consult professional maintenance personnel when adding transmission oil to ensure that the amount of transmission oil added is neither too much nor too little. Generally speaking, too much transmission oil may lead to higher oil temperature and excessive oil pressure, which can cause damage to the seals and oil seals of the transmission system, while too little transmission oil may lead to insufficient lubrication, accelerate the wear of transmission parts, and even cause serious failures. Therefore, the right amount of transmission oil is essential to ensure the normal operation of LiuGong loaders. In addition, in addition to controlling the amount of transmission oil added, users should also regularly check the use of transmission oil, such as checking and replacing the transmission oil after a certain period of work, so as to maintain a good lubrication state of the transmission system. At the same time, choosing a high-quality transmission oil is also key to improving the reliability and service life of the loader's drivetrain. In short, the amount of transmission oil added to Liugong loaders should be determined according to the specific situation, and the transmission oil should be regularly checked and replaced to ensure the normal operation of the loader.