What phenomena will occur if the wear on the shifting fork shaft groove of a tractor continues to be used?

Wear on the fork shaft groove of a tractor can be caused by a variety of factors. During operation, the relative motion between the fork and the fork shaft generates friction, and prolonged use leads to gradual wear on the groove surface; additionally, dust and sand particles from the working environment entering the groove can further exacerbate the wear. Groove wear significantly affects the fit between the fork and the fork shaft. As wear intensifies, the clearance increases, causing the fork to wobble during operation and fail to accurately grip objects, thereby reducing work efficiency; in severe cases of wear, the fork may malfunction, requiring frequent replacement or repair, which increases usage costs. Groove wear also enlarges the gap between the fork and the fork shaft, resulting in an insecure connection. During work, due to groove wear, the fork is prone to detaching from the fork shaft, causing unstable connections, increasing operational risks, and compromising safety. Furthermore, groove wear roughens the surface, increasing friction between the fork and the fork shaft. This not only raises the operating force required but also accelerates wear on the fork shaft; in severe cases, it may lead to fracture of the fork shaft, rendering the fork unable to function properly.