Wear of the crawler track. Wear between the track pin and the pin bushing is inevitable, but this wear will stretch the track pitch and make the track too large. If this wear continues, the track will move sideways, causing wear on the idler, track rollers, and sprockets, while also exacerbating the wear on the track pin and bushing.
Wear of the idler. Manifests as a decrease in the idler protrusion width, a decrease in the idler raceway diameter, and a decrease in the idler body diameter.
Wear of the carrier roller. Manifests as a decrease in the width of the carrier roller flange, a decrease in the outer diameter of the carrier roller raceway, and a decrease in the outer diameter of the carrier roller flange.
Wear of the track roller. Same as carrier roller, manifests as a decrease in the outer flange diameter, a decrease in the raceway diameter, a decrease in the diameter of the inner flange on both sides, a decrease in the width of the inner flange on both sides, and a decrease in the width of the outer flange.
Take measures as follows
If the undercarriage parts of the rotary drilling rig show obvious wear in the early stage, the rig should stop immediately and check the overlap between the idler, sprocket, track roller, carrier roller and the longitudinal center line of the track frame.
In order to extend the service life, you can swap the front and rear track rollers, but the original position of the single and double track rollers on the track frame must remain unchanged.
For all undercarriage parts, we can adopt the overlay welding to repair or replace them.
If the track link pitch becomes longer due to wear, you can reverse the track link to remedy the situation or replace it with a new track link.
