With the development of excavators and pile drivers, their performance has become increasingly advanced, and their reliability and maintainability have further improved. If construction equipment cannot be repaired promptly, it will significantly affect the construction progress, quality, and economic benefits of the enterprise. Therefore, the more modern and large-scale the construction equipment, the more important on-site emergency repairs become. Compared to general maintenance, on-site emergency repairs for excavators and pile drivers involve using emergency diagnostics and repair techniques at the construction site to restore the basic functions needed for construction. This means quickly repairing damaged parts of the construction machinery so that it can complete its scheduled tasks. The main task of maintenance support is to ensure that construction machinery is in good condition and ready for use when necessary. If on-site repairs are carried out according to standard maintenance procedures, it would take a long time, impacting construction progress and timelines, and reducing equipment utilization rates. Due to differing objectives, there is a significant difference between routine maintenance and on-site emergency repairs. Typically, repair work is carried out by skilled mechanics who complete the job according to prescribed standards. They follow a series of methods including fault diagnosis, positioning, isolation, repair, and calibration, focusing on replacement to restore the various functions of the construction equipment. On-site emergency repairs, however, are carried out by operators or on-site emergency repair personnel. These repairs are done quickly and conveniently to restore the basic performance requirements of the construction machinery. On-site emergency repairs for engineering machinery involve many factors and require systematic research.

Based on the existing foundation, repair methods specified in existing regulations can be used, such as replacement repairs, original repairs, or temporary repair methods such as matching, bonding, welding, binding, disassembly, and bypassing. These methods are relatively flexible.