In the walking mechanism of dry crawlers (as opposed to lubricated crawlers and sealed crawlers), the crawlers are not lubricated, resulting in 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. If this wear continues, the track will move sideways, which will cause the wear of the guide wheels, supporting wheels, sprocket wheels, driving 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 height of the crawler chain rail caused by the contact between the track surface of the crawler chain track and the guide wheel, sprocket wheel, and support wheel. The reduction. Severe wear of the track shoes will cause the loss of the traction of the bulldozer.