After the loader leaves the factory, it is generally stipulated that there is a running in period of about 60 hours (some are called running in period), which is stipulated according to the technical characteristics of the early use of the loader. The run-in period is an important link to ensure the normal operation of the loader, reduce the failure rate and extend its service life. Some users ignore the special technical requirements of the running-in period of the new machine due to the lack of common sense in the use of the loader or because of the tight schedule or want to get profits as soon as possible. Some users even think, anyway, manufacturers have the repair period, the machine is broken by the manufacturer is responsible for the maintenance, so the machine overload for a long time to be put into use in the running-in period, cause the machine early failure occurs frequently, which not only affect the normal use of the machine, shorten the service life of the machine, but also because the machine damage affects the construction schedule. Therefore, full attention should be paid to the application and maintenance of loader running-in period.