It was a cold winter morning at an open - pit coal mine. The Hitachi EX1900 - 6 large hydraulic excavator, the main force responsible for loading coal onto transport trucks, was supposed to start a busy day of work. However, when the operator, Jack, turned on the excavator and tried to control the hydraulic system to lift the bucket, he found that the hydraulic motor of the excavator did not respond at all. He repeatedly pressed the control button, and after a few seconds, the motor finally made a dull sound, but it only rotated at a very low speed. Even when Jack adjusted the throttle to the maximum, the motor's rotation speed still couldn't reach the normal working level, and the bucket could only move slowly, which was completely unable to meet the mine's daily coal loading task.
Jack, who had rich operating experience, immediately realized that there was a serious problem with the hydraulic motor. He shut down the excavator and reported the situation to the mine's equipment management director, Lisa. Lisa was shocked when she heard the news. The Hitachi EX1900 - 6 was the core equipment of the mine. If it couldn't work normally, the daily coal output would be reduced by more than 30%, which would directly affect the mine's delivery plan and bring huge economic losses.
Lisa quickly arranged for the maintenance team to rush to the scene. The maintenance team first checked the hydraulic oil tank and found that the oil level was within the normal range and the oil quality was not abnormal. Then they used a pressure gauge to detect the hydraulic oil pressure and found that the pressure was much lower than the standard value. They suspected that the oil pump was faulty, so they disassembled the oil pump for inspection. After careful checking, they found that the oil pump's internal gears were slightly worn, but it was not enough to cause such a serious pressure drop. They then adjusted the overflow valve, but the hydraulic oil pressure still didn't improve.
Next, the maintenance team disassembled the hydraulic motor. After opening the motor shell, they found that the internal piston and cylinder block were severely worn, with obvious grooves on the surface, which led to a large amount of hydraulic oil leakage. In addition, some impurities in the hydraulic oil had accumulated at the oil inlet of the motor, causing partial blockage, and the motor's rotating shaft also had a slight jamming phenomenon. The maintenance team tried to clean the oil passage, polish the worn parts, and replace the sealing ring, but after reassembly, the hydraulic motor still couldn't work normally. The mine's work was in a state of emergency due to this fault.
Solution:
Online Contact with KICAN Company and Its Customized Hydraulic Motor Solution
aced with the urgent situation of the Hitachi EX1900 - 6 excavator's failure, Lisa knew that relying solely on the mine's maintenance team could not solve the problem. She decided to find a professional hydraulic equipment company with rich experience in large - scale excavators to provide help. She asked her assistant to search for relevant companies online and carefully compare their technical strength, product cases, and customer evaluations. Finally, KICAN Company, which had many successful cases in solving large - scale hydraulic excavator motor problems, entered their sight.
Lisa immediately sent an online inquiry to KICAN Company. She detailed the fault situation of the Hitachi EX1900 - 6 excavator's hydraulic motor, including the phenomena of non - rotation and low speed, the inspection and maintenance process of the mine's maintenance team, and the suspected causes such as insufficient hydraulic oil pressure and severe internal wear of the motor. She also attached the technical parameters of the excavator and the photos of the worn parts of the hydraulic motor.
To Lisa's surprise, the technical team of KICAN Company responded within 20 minutes. They first sent a detailed questionnaire to further understand the working environment of the excavator (such as the average daily working time, the intensity of the work, the temperature of the working site, etc.) and the specific requirements for the hydraulic motor. Then they held an online technical communication meeting with Lisa and the mine's maintenance team. During the meeting, the technical experts of KICAN Company analyzed the fault reasons in detail based on the provided information and photos. They pointed out that the internal wear of the hydraulic motor was too serious, and the key parts had been damaged beyond repair, so the only way to solve the problem was to replace the hydraulic motor.
Considering that the Hitachi EX1900 - 6 is a large - scale hydraulic excavator with high working intensity and harsh working environment (the open - pit mine has large temperature differences and more dust), the technical team of KICAN Company decided to provide a customized hydraulic motor solution. This customized hydraulic motor uses high - wear - resistant and high - temperature - resistant materials for the key parts such as the piston, cylinder block, and rotating shaft, which can effectively adapt to the harsh working environment of the open - pit mine and extend the service life of the motor. At the same time, the motor is designed in strict accordance with the installation dimensions, interface specifications, and performance parameters of the original brand hydraulic motor of the Hitachi EX1900 - 6 excavator, ensuring that it can be perfectly replaced without modifying the excavator's original hydraulic system.
In terms of price, compared with the original brand hydraulic motor, KICAN's customized product is 25% cheaper, which can help the mine save a large amount of equipment replacement costs. In terms of quality, KICAN Company has established a strict quality control system. From the selection of raw materials to the final product testing, every link is strictly inspected. The customized hydraulic motor has passed 150 hours of continuous heavy - load operation testing and high - and low - temperature resistance testing to ensure that it can maintain stable performance in the harsh working environment of the open - pit mine.
In addition, KICAN Company has an integrated production chain that integrates R & D, production, assembly, and testing. This allows them to quickly respond to customer needs. After confirming the order with Lisa, the production department of KICAN Company immediately arranged the production plan. The customized hydraulic motor was completed in only 6 working days and was delivered to the mine by a special logistics vehicle, which was much faster than the 20 - day delivery cycle of the original brand hydraulic motor.
When the customized hydraulic motor from KICAN Company arrived at the mine, the maintenance team of the mine, under the guidance of the technical engineers of KICAN Company (who provided remote guidance through video calls), immediately started the installation work. The installation process was very smooth because the customized hydraulic motor was perfectly matched with the excavator's original interface. It only took 3 hours to complete the entire installation and debugging work.
When Jack, the operator, restarted the Hitachi EX1900 - 6 excavator, he was excited to find that the hydraulic motor rotated flexibly and powerfully. The rotation speed quickly reached the normal working level, and the bucket could be lifted, lowered, and rotated smoothly. He carried out a series of loading operations, and the excavator responded quickly and accurately, without any lag or abnormal noise. Even when loading large pieces of coal, the hydraulic motor still maintained stable performance, and the working efficiency was even higher than before the fault.
Lisa, the equipment management director, was very satisfied with the effect of the customized hydraulic motor. She said: "KICAN Company's customized hydraulic motor has solved our urgent problem. The delivery speed is much faster than we expected, which has minimized the loss caused by the excavator's failure. The quality of the motor is also very good. After using it for two months, the excavator has been working continuously in the harsh environment of the open - pit mine, and the hydraulic motor has never had any problems. The lower price has also reduced the mine's operating costs. This is a very successful cooperation."
Jack also shared his usage experience: "The excavator with the new hydraulic motor is like a new machine. It is more powerful than before. When loading heavy coal, it can easily complete the task without the previous situation of insufficient power. The operation is also more stable, which makes my work efficiency improve by nearly 25%. I no longer have to worry about the hydraulic motor breaking down during work, and I can work with more confidence."
Up to now, the Hitachi EX1900 - 6 excavator equipped with KICAN's customized hydraulic motor has been working stably in the open - pit mine for four months, ensuring the mine's daily coal output and delivery plan. The mine has also signed a long - term strategic cooperation agreement with KICAN Company. In the future, for the maintenance and replacement of the hydraulic equipment of the mine's large - scale excavators, KICAN Company will be the first choice.
