After the water well drilling rig leaves the factory, it is generally stipulated that there is a running-in period of about 60 hours (some called the running-in period), which is stipulated according to the technical characteristics of the water well drilling rig at the initial stage of use. But at present, some users ignore the special technical requirements of the new drilling rig due to the lack of common sense, the tight schedule, or the desire to obtain profits as soon as possible. The rig was overloaded for a long time during the running-in period, resulting in frequent early failures of the machine, which not only affected the normal use of the machine and shortened the service life of the machine, but also affected the progress of the project due to the damage of the machine, and the loss was not worth the loss. Therefore, full attention should be paid to the use and maintenance of water well drilling rigs during the running-in period.

The characteristics of the running-in period are as follows:

　　1. The wear rate is fast. Due to the influence of factors such as the processing, assembly and adjustment of new machine parts, the friction surface is rough, the contact area of ​​the mating surface is small, and the surface pressure is uneven, which accelerates the wear of the mating surface of the parts.

　　2. Poor lubrication. As the fitting clearance of newly assembled parts is small, and due to assembly and other reasons, it is difficult to ensure the uniformity of the fitting clearance. Lubricating oil (grease) is not easy to form a uniform oil film on the friction surface, which reduces the lubrication efficiency and causes the mechanical parts to fail. Early abnormal wear.

　　3. Loose occurred. The newly processed and assembled parts are affected by factors such as heat, deformation, and excessive wear and tear, which may easily loosen the originally fastened parts.

　　4. A leak has occurred. Due to the loosening of the machine parts, vibration and the influence of the machine's heat, there will be leakage at the sealing surface of the machine and the pipe joints.

　　5. Operation error. Mostly due to insufficient understanding of the structure and performance of the machine, it is easy to cause malfunctions or even accidents due to operating errors.