Construction machinery factory, the general provisions of the break-in period of about 60 hours (some called walking period), which is the manufacturing plant according to the technical characteristics of the early use of construction machinery and regulations. But at present, some users due to the lack of common sense in the use of construction machinery or because of tight deadlines, or want to get revenue as soon as possible, and ignore the special technical requirements of the new machine break-in period. Machine in the break-in period for a long time overload use, resulting in frequent early failure of the machine, which not only affects the normal use of the machine, shorten the service life of the machine, but also because of machine damage, affecting the progress of the project. Therefore, the use and maintenance of the break-in period of construction machinery should be given full attention.

一、The characteristics of the break-in period :
1. fast wear. Due to the new machine parts processing, assembly and adjustment factors, its friction surface rough, with Combined surface contact area is small, the surface pressure condition is uneven, accelerating the wear of the parts with the surface.

2. Poor lubrication. As the newly assembled parts of the fit clearance is small, and due to assembly and other reasons, it is difficult to ensure the uniformity of the fit clearance, lubricating oil (grease) is not easy to form a uniform oil film on the friction surface, thus reducing the lubrication efficiency, resulting in early abnormal wear of the machine parts.
3. Loosening occurs. New processing and assembly of parts, heat, deformation and other factors, coupled with wear too fast and other reasons, easy to make the original fastening of the parts. Easy to make the original fastening of parts loose.

4. Leakage occurs. Due to the loosening of the machine parts, vibration and the influence of heat on the machine, the sealing surface of the machine and the pipe joints, etc. Leakage will occur.
5. Operating errors. Due to the lack of understanding of the structure and performance of the machine, it is easy to cause malfunctions due to operational errors, and even cause The machine may cause malfunction or even mechanical accident.

二、The use and maintenance of the break-in period
1. Because construction machinery is a special vehicle, the operator should accept the manufacturer's training, guidance, the structure of the machine, performance has a full understanding of the operation and maintenance experience before operating the machine. The manufacturer provides the product use and maintenance manual, is the necessary information for the operator to operate the equipment, before operating the machine, be sure to read the use and maintenance manual, according to the requirements of the manual for operation and maintenance.
2. Pay attention to the work load during the break-in period, the work load during the break-in period should not exceed 80% of the rated work load in general, and to arrange a suitable workload to prevent the occurrence of overheating caused by long continuous operation of the machine.
3. Pay attention to the frequent observation of the instrument indication, anomalies, should be promptly stopped to eliminate, in the cause is not found, before the fault is not removed, should stop the operation.

4. Pay attention to the frequent inspection of lubricating oil, hydraulic oil, coolant, brake fluid and fuel oil (water) level and quality, and pay attention to the inspection Check the sealing of the whole machine. Inspection found in the oil and water lack of too much, should analyze the reasons. At the same time, should strengthen the lubrication of the lubrication points, it is recommended that During the break-in period, grease the lubrication points every shift (except for special requirements).

5. Keep the machine clean, timely adjustment, tightening of loose parts to prevent loose and intensify the wear and tear of parts or lead to Parts lost.
6. At the end of the break-in period, the machine should be subject to mandatory maintenance, good inspection and adjustment work, while paying attention to the replacement of oil.

In short, construction machinery in the break-in period, the use of maintenance requirements can be summarized as: strengthen training, reduce the load, pay attention to inspection, and Strengthen lubrication. As long as the attention and implementation of the requirements of the construction machinery break-in period maintenance and maintenance, will reduce the occurrence of early failure, Extend the service life, improve operational efficiency, so that the machine for you to bring more revenue.