I often hear from friends about the problems such as oil leakage of excavator support wheels, broken sprocket wheels, and inconsistent tightness of the walking tracks, and these are all problems related to the four wheels of the excavator. The four-wheel area is directly related to the working performance and walking performance of the excavator. If the excavator is to travel and fast, maintenance is the key. The following are the maintenance methods related to the four-wheel area:

　　Rollers

　　How to repair and maintain the four-wheel area of ​​the excavator

　　 In the work, the support wheels should be avoided for a long time in muddy water. After the work is completed every day, the one-sided crawler should be propped up, and the walking motor should be driven to shake off the dirt, gravel and other debris on the crawler. The roller must be kept dry during construction in winter, because there is a floating seal between the outer wheel of the roller and the shaft. If there is water, it will freeze at night. When the excavator is moved the next day, the seal and ice will be contacted. Scratches cause oil leakage. Damage to the supporting rollers will cause many failures, such as running deviations, walking weakness, etc.

　　Support sprocket

　　The supporting sprocket is located above the X frame, and its function is to maintain the linear motion of the chain track. If the supporting sprocket is damaged, the track chain track will not be able to maintain a straight line. The carrier wheels are filled with lubricating oil at one time. If the oil leaks, you can only replace them with new ones. Try to avoid the supporting wheels soaking in muddy water for a long time during work. Usually, keep the X-frame inclined platform clean. The accumulation of dirt and gravel prevents the rotation of the supporting sprocket wheel.

  Guide wheel

　　The guide wheel is located in front of the X frame, which consists of the guide wheel and a tension spring installed inside the X frame. Keep the guide wheel in front during operation and walking, so as to avoid abnormal wear of the chain track, and the tension spring can also absorb the impact of the road surface during work and reduce wear.

　　 drive wheel

The drive wheel is located behind the X frame, because it is directly fixed on the X frame and has no shock absorption function. If the drive wheel travels in the front, it will not only cause abnormal wear on the drive ring gear and chain rail, but also adversely affect the X frame. The X frame may have problems such as early cracking. The protective plate of the walking motor can protect the motor. At the same time, some soil and gravel will enter the internal space, which will wear the oil pipe of the walking motor. The moisture in the soil will corrode the joints of the oil pipe, so the protective plate should be opened regularly. Clean up the dirt inside.

　　 track

　　The track is mainly composed of track shoes and chain track sections. The track shoes are divided into standard plates and extension plates. Standard plates are used for earthwork conditions, and extended plates are used for wetland conditions. The crawler shoes are severely worn in the mine. When walking, the gravel sometimes gets stuck in the gap between the two plates. When it comes into contact with the ground, it will squeeze the two plates, and the track shoes are prone to bending and deformation. , Walking for a long time will also cause cracking problems in the bolt fixation of the track shoe. The chain track section is in contact with the drive gear ring and is driven by the gear ring to rotate. If the track is too tight, it will cause early wear of the chain track, ring gear and guide wheel. Therefore, the tension of the crawler should be adjusted according to the different construction road conditions.