Sany crawler crane Shandong rescue case

Customer's Name: Mr. Meng Crane Fault Description: Unstable Rotation, Often Stuck, Unstable and Trembling of the Auxiliary Winch Maintenance Personnel: Liu Zhicheng, Xu Xinghua 2 Maintenance Time: 4 hours Maintenance Process Description: After the customer called the Sany 4008 hotline, the 24-hour hoisting rescue ECC center immediately dispatched the service engineer to the scene within 2 hours, (1) Remove the rotary motor and the rotary buffer valve, and found that there are a lot of iron cutting in the buffer valve, mainly because the customer's hydraulic oil filter element was not replaced, clean the buffer valve, Maintenance of the swing motor, troubleshooting. (2) Replace the main and auxiliary balance valves, clean them all, and then clean the main relief valve and the secondary relief valve on the main valve, adjust the appropriate pressure, and troubleshoot. Maintenance cost: free of charge according to 24-hour Sany service rescue Maintenance result: all faults are eliminated