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1.油封拖拉机所用油封的型号代号与规格尺寸表示方法见表1。机手更换油封时，不但要正确选择型号和规格，还要正确安装。安装时应注意以下几点。(1)保证油封及接触的轴颈表面光洁、无伤痕，轴端无毛剌、无飞边等。若轴颈表面有较长的轴向伤痕，可焊修后用车床重新加工，否则应
1. Oil seal tractor oil seal used in the model code and size specifications shown in Table 1. Hand replacement oil seal, not only the correct choice of models and specifications, but also the correct installation. The installation should pay attention to the following points. (1) to ensure that the oil seal and contact journal surface smooth, no scars, shaft burr, no flash and so on. If the axial surface of the shaft has a longer axial flaw, can be repaired by lathe after rework, otherwise it should be