As a kind of construction machinery, Liugong loader is widely used in various construction sites and mines and other operating environments. For the maintenance and maintenance of Liugong loaders, the change of transmission oil is one of the important links. So, how often does the transmission oil of Liugong loaders need to be replaced? Transmission oil plays a role in lubrication, cooling and cleaning in Liugong loaders, which is essential to ensure the normal operation of the gearbox. Generally speaking, the transmission oil change interval of Liugong loaders will vary depending on the specific use case and working environment. However, in order to ensure the normal operation of the gearbox and extend its service life, it is recommended that the owner regularly check and change the transmission oil after the Liugong loader has been used for a period of time. Specifically, if the Liugong loader is used in harsh working environments, such as high temperature, high humidity, high dust, etc., the transmission oil replacement cycle should be shortened accordingly. Because in such an environment, transmission oil is more susceptible to contamination and aging, losing its proper performance. In the general working environment, the transmission oil replacement interval can be appropriately extended, but it should also be checked and replaced regularly to avoid transmission failure due to oil aging or contamination. In conclusion, the transmission oil change cycle of LiuGong loaders should be determined on a case-by-case basis, but regular inspection and replacement of transmission oil is one of the important measures to keep the loader running normally. According to the suggestions in the manual, the owner can formulate a reasonable transmission oil replacement plan based on the actual situation to ensure the normal operation and service life of the Liugong loader.