1. Clean the multi-way valve. Check for oil leakage and cracks. First check whether the hydraulic oil and filter element are too dirty and whether there is oil leakage!

2. Check whether the boom cylinder descends by itself!

3. (If there are no problems in the first two places) It is recommended to replace the hydraulic pump.

Loader is a kind of earthwork machinery, which is widely used in highway, railway, construction, hydropower, port, mine and other construction projects. Mainly used for bulk materials such as shovel, sand, lime and coal. , but also light shovel light mining materials and hard soil. Replacing different auxiliary working devices can also be used for bulldozing, lifting and loading and unloading wood and other materials. In road construction, especially in high-grade highway construction, loaders are used for filling and excavation of subgrade engineering, aggregate and loading of asphalt mixture and cement concrete yard. In addition, it can also carry out operations such as bulldozing, leveling and towing other machinery. Loader has become one of the main types of earthwork construction in engineering construction because of its advantages of fast working speed, high efficiency, good maneuverability and easy operation.