Correct use and maintenance of the four wheels of the excavator

The four-wheel belt is composed of what we often call the supporting wheel, the supporting sprocket, the guide wheel, the driving wheel and the crawler assembly. As necessary components for the normal operation of the excavator, they are related to the working performance and walking performance of the excavator.
After running for a certain period of time, these components will wear out to a certain extent. However, if excavators spend a few minutes on daily maintenance, they can avoid “major surgery on the excavator legs” in the future. So how much do you know about the maintenance precautions for the four-wheel area?


In daily work, try to avoid the rollers being immersed in muddy water working environment for a long time. If it cannot be avoided, after the work is completed, the single-sided crawler track can be propped up and the walking motor can be driven to shake off the dirt, gravel and other debris on the surface.
After daily operations, keep the rollers as dry as possible, especially during winter operations. Because there is a floating seal between the roller and the shaft, water freezing at night will scratch the seal, causing oil leakage. Autumn is here now, and the temperature is getting cooler day by day. I would like to remind all digging friends to pay special attention.

It is necessary to keep the platform around the supporting sprocket clean on a daily basis, and do not allow excessive accumulation of mud and gravel to hinder the rotation of the supporting sprocket. If it is found that it cannot rotate, it must be stopped immediately for cleaning.
If you continue to use the supporting sprocket when it cannot rotate, it may cause eccentric wear of the wheel body and wear of the chain rail links.


It is generally composed of a guide wheel, a tensioning spring and a tensioning cylinder. Its main function is to guide the crawler track to rotate correctly, prevent it from wandering, track derailment, and adjust the track tightness. At the same time, the tension spring can also absorb the impact caused by the road surface when the excavator is working, thereby reducing wear and extending service life.

In addition, during the operation and walking of the excavator, the guide wheel should be tightened on the front track, which can also reduce abnormal wear of the chain rail.


Since the driving wheel is directly fixed and installed on the walking frame, it cannot absorb vibration and impact like a tension spring. Therefore, when the excavator is traveling, the driving wheels should be placed as far back as possible to avoid abnormal wear on the driving ring gear and chain rail, which will affect the normal use of the excavator.
The traveling motor and reducer assembly are closely connected to the drive wheels, and there will be a certain amount of mud and gravel in the surrounding space. They need to be inspected and cleaned regularly to reduce wear and corrosion of key parts.
In addition, diggers need to regularly check the wear degree of the “four wheels and one belt” and replace them if necessary.

The track assembly is mainly composed of track shoes and chain rail links. Different working conditions will cause different degrees of wear on the track, among which the wear of the track shoes is the most serious in mining operations.

During daily operations, it is necessary to regularly check the wear and tear of the track assembly to ensure that the track shoes, chain rail links and drive teeth are in good condition, and to promptly clean up mud, stones and other debris on the tracks to prevent the excavator from walking or rotating on the vehicle. may cause damage to other components.


Post time: Oct-11-2023