During normal operation, the track pin slowly rotates backwards in the pin hole, the two wear evenly, the pin hole gradually becomes larger, and the pin gradually becomes thinner. If the operation is improper, such as high-speed turning, sudden start, or muddy water, weeds, etc. Causing the pins to be blocked, the left and right sides of the track shoe will bend and sag under excessive pressure, and the pins will be deformed and bent. Rotation, the pin and the pin hole become sliding friction, and the friction part is limited to a small part of the contact surface, the pin is gradually ground into a bent shape, and the pin hole also becomes an oval shape. The enlarged pin hole causes the track pitch to be longer (the pitch is the center distance between the holes at both ends of the track shoe), so the track shoe and the drive wheel gnaw each other, the track shoe is worn through, and the drive wheel teeth are knife-edged. According to the measurement, when the pitch changes from 174 mm to 184 mm, the opening width of the drive wheel teeth changes from 87 mm to 97 mm. At this time, the normal rolling engagement is completely destroyed.
As the track shoe pitch is elongated, it also causes the support wheels to jump when walking, which accelerates the wear of the track shoe track. When the runway is more than 4 mm, it should be repaired.
The wear of the guide part of the track shoe is mainly caused by the track deviation, the serious deformation of the track shoe, and the excessive axial shaking of the supporting wheel and the guide wheel.
Common scrapped track shoes are severely worn or worn through at the meshing part with the driving wheel.