拖拉机在使用中由于操作不当,受到冲击载荷,容易产生主离合器从动盘磨擦片磨损、龟裂、烧伤,从动盘翘曲,磨擦片和花键轴套铆钉松动,以及键槽磨损等。从动盘磨擦片磨损到铆钉外露,龟裂在两处以上,以及烧焦等,应更换新磨擦片。1.磨擦片的更换(1)用略小于铆钉直径的钻头钻去旧铆钉,或 Tractor in use due to improper operation, subject to impact load, prone to the main clutch driven disc friction plate wear, cracks, burns, driven disc warpage, friction plate and spline shaft rivets loose, and keyway wear and tear. Driven friction plate wear to rivets exposed, cracked at two or more, and scorch, etc., should be replaced with a new friction plate. 1. Friction plate replacement (1) Drill the old rivet with a bit slightly smaller than the rivet diameter, or