Construction machinery also has run-in period?

After the engineering machinery is shipped from the factory, it is generally required to have a running-in period of about 60 hours (sometimes referred to as the run-in period), which is defined by the manufacturing plant according to the technical characteristics of the initial stage of use of the construction machinery. However, at present, some users neglect the special technical requirements of the new aircraft run-in period due to the lack of common sense in the use of construction machinery or due to tight schedules or want to obtain benefits as soon as possible. The machine is overloaded for a long time during the run-in period, resulting in frequent machine failures. This not only affects the normal use of the machine, shortens the service life of the machine, but also damages the machine and affects the progress of the project. Therefore, attention should be paid to the use and maintenance of the running-in period of construction machinery.

First, the characteristics of the run-in period:

1. Wear quickly. Due to the effects of machining, assembly and adjustment of new machine components, the friction surface is rough, the contact area of the mating surface is small, and the surface pressure conditions are uneven, which accelerates the wear of the mating surface of the parts.

2. Poor lubrication. Because the newly assembled parts have a small fit clearance, 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, thereby reducing the lubrication efficiency, resulting in early mechanical parts Abnormal wear.

3. Looseness occurred. The parts that are newly assembled and assembled are affected by factors such as heat and deformation, as well as excessive wear, etc., which can easily loosen the originally fastened components.

4. Leakage occurred. Due to the looseness of the parts, the vibration and the influence of the heat of the machine, leakage may occur at the sealing surfaces of the machine and at the fittings.

5. Operation error. 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 mechanical accidents.

Second, the use and maintenance of the run-in period

1. As construction machinery is a special vehicle, operators should receive training and guidance from the manufacturer, have a thorough understanding of the structure and performance of the machine, and gain certain operation and maintenance experience before operating the machine. The manufacturer's product usage and maintenance instructions are necessary information for the operator to operate the equipment. Before operating the machine, it is necessary to read the instructions for use and maintenance, and perform operations and maintenance according to the instructions.

2. Pay attention to the work load during the run-in period. The work load during the run-in period should not exceed 80% of the rated work load, and an appropriate workload should be arranged to prevent the overheating caused by the continuous operation of the machine for a long time.

3. Pay attention to the instructions of each instrument. Observe the anomalies and stop them in a timely manner. If the cause is not found and the fault is not removed, stop the operation.

4. CAUTION Always check the level and quality of oil, hydraulic oil, coolant, brake fluid, and fuel oil (water), and check the tightness of the machine. The lack of excess oil in the inspection should be analyzed. At the same time, the lubrication of each lubrication point should be strengthened. It is recommended that during the break-in period, grease should be added to each lubrication point (except for special requirements).

5. Keep the machine clean and adjust and tighten the loose parts in time to prevent them from wearing out or causing parts to be lost due to looseness.

6. At the end of the run-in period, the machine shall be subject to compulsory maintenance, inspection and adjustment work, and attention shall be paid to the replacement of the oil.

In short, the requirements for the use and maintenance of construction machinery during the break-in period can be summarized as: strengthening training, lightening the load, paying attention to inspection, and strengthening lubrication. As long as you pay attention to and implement the maintenance and maintenance of the engineering machinery during the run-in period as required, it will reduce the occurrence of early failures, extend the service life, improve the operating efficiency, and make the machine bring you more benefits.