How to maintain the rotating turntable of Komatsu excavator?

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The slewing mechanism of excavator is composed of slewing motor, reducer, slewing gear ring and slewing center joint, which is an important part of excavator. Therefore, we should pay great attention to its maintenance in daily maintenance. Today, let's follow the pace of Bian Xiao and learn how to correctly maintain the slewing mechanism of excavators.

The rotating big turntable is composed of a rotating big gear ring, a reducer and a center joint. In daily life, you can lift the cover plate on one side of the boom base to check the lubrication and wear of the big gear ring. When the machine is used for a long time, the dust ring at the rotating center joint will age. Once it rains, the rain will seep into the cavity of the big gear ring along the leakage of the rotary center joint, which will cause water accumulation in the turntable in the long run and seriously shorten the service life of the rotary gear ring of the excavator.

It is also necessary to prevent moisture from infiltrating into the butter in the cavity and prevent the lubricating performance of the butter from being weakened by dilution with water. In addition, the gear ring is in the state of rainwater infiltration for a long time, which will lead to the iron falling off of the gear ring, and noise will be generated when the machine is used, which will eventually lead to the loss of gear ring efficiency.

Therefore, the rotary gear should be replaced once a year, in which about 36 liters of butter should be added to the machine every 20 tons, and the habit of opening the boom base and the front cover of the frame regularly should be formed, and the gear ring and lubrication should be checked in detail in time. If water is found, the bottom cavity cover plate can be opened to drain the water.

engine

The lubricating oil maintenance interval of rotating motor is 1000 hours. In daily operation, we should observe the amount of rotating lubricating oil from the dipstick. In some cases, we will find abnormal loss of lubricating oil. We should open the window of the big gear ring and check whether the lubricating oil leaks into the inner cavity of the big gear ring through the sealing ring.

In addition to the above maintenance methods, it is also necessary to regularly check whether the gear ring bolts are loose and whether the dust ring of the slewing bearing is damaged. Some small cracks on the outside will be covered with mud. If these cracks are not found in time, the turntable may crack.

bearing

What needs to be emphasized here is that many car owners have some misunderstandings in the maintenance of slewing bearings. They think that slewing bearings and large and small arms should use the same lubricating oil and keep the habit of adding it every day. As everyone knows, this is a great mistake, which will not only fail to maintain, but will increase the exposure of the dust ring of the slewing bearing.

Correct maintenance method, the correct adding time of slewing bearing lubrication is once every 250 hours. When adding butter, turn the machine and add lubricating oil at an average interval of 15 degrees. According to the different operating frequency and time, the butter addition period can be slightly adjusted, and the lubrication treatment can be basically done once a week.

Have you learned all the above points about the maintenance of excavator slewing mechanism? How to correctly maintain the rotating mechanism in daily operation is an important knowledge we learn together. Only by doing a good job in machine maintenance can we have better performance in future operations.