在检修东方红－60T推土机的4125A发动机曲轴时，常发现第5道主轴颈的轴向止推轴肩磨损严重，并磨出较深沟痕。这主要是由于工作中频繁使用离合器造成的。轴肩经过车削或磨削修理后（应保证其与主轴颈轴线垂直），采用加大止推环的方法修理，也不能达到理想的配合间隙。用加垫片 When overhauling the 4125A engine crankshaft of Dongfanghong-60T bulldozer, it is often found that the axial thrust shoulder of the fifth main journal wears heavily and grinds deep groove marks. This is mainly due to the frequent use of clutches during work. After the shaft shoulder has been turned or ground and repaired (should be perpendicular to the axis of the main shaft), the thrust ring is used to repair and the ideal fit clearance cannot be achieved. With gasket