Multiple units tight-lock type hook dismounting process

The invention relates to a motor train unit sealing typed coupler disassembly/assembly process which adopts a movable disassembly/assembly dolly to carry out the disassembly and assembly of the coupler and comprises disassembly process and assembly process. As the movable disassembly/assembly dolly has small volume, smart operation and is suitable for site operation; furthermore, different coupler lifting devices can be arranged on the dolly according to the train types, the disassembly/assembly of the invention is applicable for the disassembly/assembly of a plurality of couplers, improves the efficiency of the coupler disassembly/assembly, can adjust the distance of the lifting device and the coupler by an oil cylinder adjusting lifting small crossbeam, has high reliability; meanwhile, the disassembly/assembly process is provided with a special spanner used for the disassembly/assembly of bolts and a brake device, thus saving the operation time of the working personnel and ensuring the safety of the working personnel.