The maintenance crane factory, the general provisions of the run-in period of about 60 hours (some called a walk-in period), which is a manufacturing plant cranes use the technical characteristics of the initial provisions. The run-in period is to guarantee the cranes normal operation, reduce the failure rate, an important part of extending its life. However, some users due to the lack of crane use common sense or because of the tight schedule, or want to gain as soon as possible, while ignoring the special technical requirements of the run-in period of the new machine. Some users even think, anyway manufacturers for repair of the machine is broken by the manufacturer responsible for the maintenance, So the machines in the run-in period, a long time overload, leading to the machine early failures occur frequently, which affects not only the normal use of the machine, shorten the life of the machine, but also because of the damage to the machine, affecting the progress of the project. Therefore, insufficient attention to the use and maintenance of the run-in period of the crane.