Wear and Preventive Measures of Walking Device of Crawler Bulldozer

 


Common wear and tear of crawler bulldozers four wheels and one belt


The walking mechanism of the Crawler Bulldozer carries the full weight of the bulldozer. Responsible for the driving function of the bulldozer. The main damage form is wear. This damage form is concentrated in the following contact parts: the outer surface of the drive wheel tooth and the track pin sleeve; the guide wheel and the track link track surface of the track; the support wheel and the track link track The surface; the track surface of the sprocket wheel and the track link of the track; the contact surface of the track pin and the pin sleeve; the track shoe and the ground.


1. Wear of the track


In the walking mechanism of the dry crawler, the crawler is not lubricated, causing wear between the crawler pin and the pin sleeve due to relative movement during the working process. The wear between the pin and the pin sleeve in the track is inevitable and normal, but this wear will extend the pitch of the track and make the track too large. This wear and tear continues. The track will move sideways, which will cause the wear of the guide wheels, supporting wheels, sprocket wheels, drive gear teeth and other parts, and at the same time increase the wear of the track pins and sleeves. The wear of the crawler is also manifested in the reduction in the height of the crawler spur due to the contact between the crawler shoe and the ground, and the crawler link caused by the contact between the track surface of the track link and the guide wheel, sprocket, and support wheel. The height reduction. Severe wear of the track shoes will cause the loss of the traction of the bulldozer.


2. Wear of driving wheels


The wear of the gear teeth of the driving wheel often occurs on the roots, front and rear sides, left and right sides and tops of the gear teeth. When the bulldozer travels forward and the gear teeth support the track pin sleeve, the wear occurs on the front side of the gear teeth; conversely, when the Bulldozer travels backward, the wear occurs on the rear side of the gear teeth. When the track is too loose, the track will deviate, and the gear teeth will impact the side of the chain track link, which will cause the wear of the drive wheel. Another form of wear on the teeth of the drive wheel is top wear. Top wear occurs when the gear teeth of the track and the drive wheel are stuffed with viscous material, and the meshing relationship between the gear teeth of the drive wheel and the track pin sleeve is changed. When the bulldozer travels forward, it will mark the apex of the back of the tooth on the drive side of the drive wheel and the side of the pin sleeve.


Crawler Bulldozer

Crawler Bulldozer


3. Wear of guide wheels


The wear of the guide wheel is caused by contact with the raceway surface of the chain track section, and the wear of the convex width of the guide wheel body is caused by the contact with the side surface of the chain track section. It is manifested as: the reduction of the convex width of the guide wheel; the reduction of the diameter of the raceway surface of the guide wheel; the reduction of the diameter of the guide wheel.


4. Wear of carrier wheels


The wear of the sprocket wheel is caused by contact with the raceway surface of the chain track section. The performance is as follows: the width of the flange of the carrier wheel is reduced; the outer diameter of the carrier wheel raceway surface is reduced; the outer diameter of the carrier wheel flange is reduced.


5. Wear of support wheels


The wear of the supporting wheel is the same as the wear of the supporting wheel and the guide wheel, and it is also caused by contact with the raceway surface of the chain track section. The specific performance is: reduction of outer flange diameter; reduction of raceway surface diameter; reduction of bilateral inner flange diameter; reduction of bilateral inner flange width; reduction of outer flange width.


Preventive measures against wear of four wheels and one belt on crawler bulldozers


In view of the wear and tear of the crawler walking mechanism, the following measures can be taken: If the walking mechanism of the bulldozer shows obvious wear at an early stage, the operation should be stopped immediately. Check the coincidence between the center of the guide wheel, the supporting wheel, the supporting wheel, the driving wheel and the longitudinal center line of the walking frame


In order to prolong the service life, the front and rear support wheels can be exchanged, but the original positions of the single and bilateral support wheels on the traveling frame must be kept unchanged; after the components of the traveling mechanism are worn to the limit of use, the guide wheels and the supporting wheels , Support rollers, driving wheel teeth, grousers, and chain track sections can be repaired or replaced by surfacing welding; for track chain track pitches that become longer due to wear, reversal of chain track sections can be used to remedy or Replace with new chain track section.


If you have any questions or needs, please contact our Crawler Dozer Supplier


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