After the hydraulic break hammer leaves the factory, it is generally stipulated that there is a running-in period of about 60 hours (some call it the running-in period), which is set by the manufacturing factory based on the technical characteristics of the hydraulic breaker in the initial stage of use. The running-in period is an important link to ensure the normal operation of the hydraulic break hammer, reduce the failure rate and extend its service life. However, at present, some users ignore the special technical requirements during the running-in period of new machines due to a lack of common knowledge about the use of hydraulic break hammer, tight schedules, or the desire to gain profits as soon as possible. Some users even think that since the manufacturer has a warranty period, the manufacturer will be responsible for the repair of the machine when it breaks down. As a result, the machine is used under overload for a long time during the running-in period, leading to frequent early failures of the machine. This not only affects the normal use of the machine and shortens its service life, but also delays the progress of the project due to machine damage. Therefore, the use and maintenance of large hydraulic break hammer during the running-in period should be given full attention.
Characteristics of the running-in period:
No.1 Fast wear rate:
Due to the influence of factors such as the processing, assembly and adjustment of new machine parts, the friction surfaces are rough, the contact area of the mating surfaces is small, and the pressure distribution on the surface is uneven. During the operation of the machine, the protruding and recessed parts on the surface of the components interlock and rub against each other. The metal debris worn off acts as an abrasive and continues to participate in the friction, further accelerating the wear of the mating surfaces of the components. Therefore, during the running-in period, it is easy to cause wear of components (especially mating surfaces), and the wear rate is fast. At this point, if the operation is overloaded, it may lead to the damage of components and cause early failure.
No.2 Poor lubrication:
Due to the small fit clearance of newly assembled components and the difficulty in ensuring the uniformity of the fit clearance due to assembly and other reasons, the lubricating oil (grease) is not easy to form a uniform oil film on the friction surface to prevent wear. This reduces the lubrication efficiency and causes premature abnormal wear of the machine parts. In severe cases, it may cause scratches or seizing on the precisely fitted friction surfaces, leading to the occurrence of malfunctions.
No.3 Loosening occurs:
Newly processed and assembled components have deviations in geometric shape and fit dimensions. During the initial stage of use, due to the influence of alternating loads such as impact and vibration, as well as factors like heat and deformation, along with rapid wear and other reasons, the originally tightly fastened components are prone to loosening.
No.4Leakage occurs:
Due to the loosening of machine parts, vibration and the influence of heat on the machine, leakage may occur at the sealing surfaces of the machine and pipe joints, etc. Some casting and processing defects are difficult to detect during assembly and debugging. However, due to the vibration and shock during the operation process, these defects are exposed, manifested as oil leakage (seepage). Therefore, leakage is prone to occur during the running-in period.
No.5 Many operational mistakes:
Due to insufficient understanding of the structure and performance of the machine (especially for new operators), it is easy to cause malfunctions or even mechanical accidents due to operational errors.
Post time: Apr-23-2025