Generally, newly purchased overhead traveling cranes and overhead gantry cranes will go through a running-in period during use. During the running-in period of new cranes, problems such as rapid wear, poor lubrication, and loose parts will occur. Therefore, when using a crane during the running-in period, attention should be paid to controlling the number of operating errors and avoiding lubrication. Defective, check regularly to avoid loosening and leakage. Below, Dejuncranes company will give you a detailed introduction to the faults that will occur during the running-in period of the new crane and the precautions during the running-in period.

What faults will occur during the running-in period of a new overhead traveling crane and overhead gantry crane?

• Wear quickly of new overhead traveling cranes and overhead gantry cranes

Due to the influence of factors such as processing, installation, and adjustment of new machine parts of the crane, its friction surface is rough, the contact area of the matching surface is small, and the pressure-bearing condition of the surface is uneven. During the operation of the crane equipment, the concave and convex parts on the surface of the parts fit and conflict with each other, and the metal chips that fall off also act as abrasives, which will increase friction and accelerate the wear of the matching surfaces of the parts. Therefore, parts will easily wear out during the running-in period, and the wear rate will be fast, so attention should be paid to daily maintenance.

• Poor lubrication of new overhead traveling cranes and overhead gantry cranes

Because the cooperation gap of newly installed parts is small, and due to installation and other reasons, it is difficult to ensure the uniformity of the cooperation gap, and the lubricating oil is not easy to form a uniform oil film on the friction surface to prevent wear. Then the lubrication efficiency is reduced, causing early abnormal wear of the machine parts.

• Loose parts of new overhead traveling cranes and overhead gantry cranes

Newly processed and assembled parts have deviations in geometric shapes and fitting dimensions. In the early stages of use, due to alternating loads such as impact and vibration, as well as the influence of factors such as heat and deformation, as well as excessive wear and other reasons, they are prone to damage. Parts that were originally fastened became loose. Moreover, loose parts can cause leakage, such as oil leakage.

If you are not familiar with some parts of a newly purchased crane, or the operation is not smooth, it may cause some mistakes, especially for new operators, which can easily lead to malfunctions. Therefore, you should first become familiar with the new mechanical crane equipment, and then officially put it into use after the running-in period.

Precautions during the running-in period of new overhead traveling cranes and overhead gantry cranes

The running-in time of a new crane is generally about 60 hours, which is stipulated by the crane manufacturer based on the technical characteristics of the crane’s initial use. There is a crane  manufacturer’s warranty, and the crane manufacturer is responsible for repairing damaged machines. Therefore, the crane machine is overloaded for a long time during the running-in period, resulting in frequent early machine failure. This not only affects the normal use of the crane machine, but also shortens the service life of the crane machine. Moreover, due to damage to the crane  machine, the progress of the project was affected. Therefore, the use and maintenance of the crane during the running-in period should attract sufficient attention.

• Control the number of operating errors. Due to insufficient understanding of the structure and performance of the overhead traveling crane or overhead gantry crane, it is easy to cause malfunctions and even mechanical accidents due to operating errors.
• Avoid poor lubrication. Since 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, and it is difficult for lubricating oil to form a uniform oil film on the friction surface to prevent wear. This reduces the lubrication efficiency and causes early abnormal wear of the crane machine parts. In severe cases, the friction surface of the precision fit may be scratched or bitten, leading to failure.
• Check regularly to avoid loosening. Newly machined parts have deviations in geometric and mating dimensions. In the early stages of use, due to the influence of alternating loads such as shock and vibration, as well as the effects of heat and deformation, coupled with excessive wear and other reasons, it is easy for originally fastened parts to loosen.
• Prevent leakage. Due to the looseness, vibration, and heat of the crane machine, the sealing surfaces of the crane machine and pipe joints will leak; some casting and processing defects are difficult to find during assembly and debugging, but due to vibration and impact during operation, this defect is exposed and manifests as oil leak. Therefore, leakage is likely to occur during the break-in period.
• Wear rate. Due to factors such as processing, assembly, and adjustment of new crane machine parts, the friction surface of the crane is rough, the contact area of the mating surface is small, and the surface pressure is uneven. During the operation of the crane machine, the concave and convex parts on the surface of the parts rub against each other, and the falling metal fragments continue to participate in the friction as abrasives, accelerating the wear of the mating surfaces of the parts. Therefore, parts are easily worn during the running-in process, and the wear rate is rapid. At this time, if it is overloaded, it may cause damage to the parts and cause early failure.

If you have any technical questions about breakdown and precautions during the running-in period of new overhead traveling cranes and new overhead gantry cranes, please contact us freely, and we will provide you overhead crane and gantry crane according to your requirements. Welcome to consult us!