Engineering machinery on-site repairs are characterized by the difficulty of supplying parts, tools, equipment and oilseeds, and poor operating environment. According to the experience of temporary repair in the field, the author summarizes 5 kinds of emergency methods. 1. Replacement parts repair methods replace the damaged components with the complete spare parts. This method can be taken regardless of normal overhaul or on-site rapid repairs. Should pay attention to, before changing parts, assembly parts disassembly process and cooperation request must be understood. When dismantling bearings, gears, tape wheels and hydraulic parts, use special tools, and can not be used hammer to prevent damage to parts. The synthetic torque converter, transmission, and the initiator of the assembly, must be strictly complied with the disassembly process request, prevent shaft neck scratch and fine coupling surface damage. My department jointly with the scene rapid collision repair request, the design made a sliding type of horse puller (see attached drawings), with pulling, pressure, smashing, twisting, pry, and so on 5 functions, can well deal with the shaft sleeve class, disc class and bearing parts of the demolition of the problems, greatly improve the on-site repair of the disassembly quality. 2. Part transposition method with its own parts to replace the installation or change the position and direction of the installation, hydraulic cylinders to achieve the restoration of the original function of a repair method, such as: (1) has a W4-60C-type digging machine, the bucket cylinder piston Y-shaped oil seal damage, forming internal leakage, the obligation speed is slower. Because the construction site has no spare parts, so it is replaced with the piston oil seal of the right leg hydraulic cylinder. In this way, the obligation to install the hydraulic system in a short time to restore the obligation to stop, although the right leg of liquid cylinder oil seal leakage incur its "soft", but still can maintain the whole machine obligations. (2) There is a ZL-40 type loader, the main hydraulic pump failure, the synthetic review of the invention, the front and rear side plate bronze wear-resisting layer and the tooth surface of the active gear are different levels of wear prestressed anchor. Because the replacement of the Assembly costs, coupled with the site and away from the collision repair sites, the basis of the front, rear side plates and the active gear wheel wear are one-way wear, and the former, rear side plates and the main, active gears of the structural dimensions of the complete and identical characteristics, then the choice will be before, rear side plate replacement status installation, and the active gears flip 180 degrees to install, so that the front and rear side plate bronze wear-resistant layer friction direction and the original friction method, to make the active gear of the tooth surface to be the obligation surface, thus restoring the loader's normal obligations. (3) because the duty pump of W4-60C type digging machine and the steering pump of the ZL-50 type loaders are all the CBG2-type loader steering pumps are CBG2 gear pumps, the installation size is identical, and the rotation direction is reversed.