Do you real know about excavator ‘four-wheeled belt”

Usually we divide the excavator into two parts: the upper body is mainly responsible for the rotation and operation functions, while the lower body performs the walking function, providing support for the excavator transition and short-distance movement. I am troubled by the common excavator failures such as oil leakage of thetrackrollers, broken supporting sprockets, inability to walk, and inconsistent crawler tightness. This article will explain the functions and related maintenance of "four wheels and one belt". Hope it will be helpful to the majority of owners.

We often say "four-wheeled belt", "four-wheeled" refers to track roller, carrierroller, sprocket and front idler , "one belt" istrack link with shoe assembly, they are directly related to the working performance and walking performance of the excavator, so do Good daily maintenance is very important. Usually, it is easy for operators to ignore the cleaning and maintenance of the lower body. The following are the maintenance tips for the "four wheels and one area" of excavators that are necessary for good operators.

The track rollers are used to support the lower frame and disperse the mechanical weight on the track. Due to the uneven installation spacing of the rollers, it is also inconsistent with the track sprocket spacing. The damage of thetrackrollers will cause many failures, such as the rollers will not rotate, increase the walking resistance and consume the power of the equipment, and the non-rotation of the rollers will cause serious wear between the links and the rollers.

During the work, try to avoid the rollers being immersed in muddy water for a long time. After the work is completed every day, one side of the crawler should be supported, and the walking motor should be driven to shake off the soil, gravel and other debris on the crawler;

In winter construction, the track roller must be kept dry, because there is a floating seal between the outer wheel and the shaft of the roller;

If there is water, it will freeze at night, and when the excavator is moved the next day, the seal will be scratched in contact with the ice, resulting in oil leakage.

The carrierroller is located above the X frame, and its function is to maintain the linear motion of the chain rail. If the carrierrolleris damaged, the track chain rail will not be able to maintain a straight line. The carrierroller is a one-time injection of lubricating oil. If there is oil leakage, it can only be replaced with a new one. During the work, try to avoid the carrierroller being immersed in muddy water for a long time. Too much dirt and gravel build up hindering the rotation of the idler rollers.

Thefront idler is located in front of the X frame. It consists of thefront idler and the tensioning spring and oil cylinder installed inside the X frame. It is used to guide the track to rotate correctly, prevent its deviation, track derailment and adjust the tightness of the track. In the process of operation and walking, keep the guide wheel in front, which can avoid abnormal wear of the chain rail, and the tensioning spring can also absorb the impact brought by the road surface during work and reduce wear and tear.

Thesprocketis located at the rear of the X frame, because it is directly fixed on the X frame and has no shock absorption function, and the drive sprocket is fixed on the travel reduction device. Certain impact and abnormal wear will also have adverse effects on the X frame, and the X frame may have problems such as early cracking. The travel motor guard plate can protect the motor, because some dirt and gravel will enter the internal space, which will wear the oil pipe of the travel motor, and the water in the soil will corrode the joints of the oil pipe, so the guard plate should be opened regularly. Clean up the dirt inside.