1.此型曲轴第三道主轴颈本来就没有油道一用户从农机公司买了一根东方红一75型拖拉机的发动机曲轴,回家发现第三道主轴颈没有油道,他没有与旧曲轴细细比较,就匆忙到农机公司要求换货。售货员拿出尚未开箱的曲轴给他看,均无油道。商检人员告诉他,没有油道是对的,因为东方红-75型拖拉机的发动机曲轴5道主轴颈和主轴瓦的润滑油,都来自主机缸 1. This type of crankshaft third main journal has no oilcourse A user bought from the farm machinery company an Oriental red a 75 tractor engine crankshaft, the home found no oil in the third main journal, he did not with the old Crankshaft thin comparison, hurried to the farm machinery company to request a replacement. The salesman took out the crankshaft that had not been unpacked and showed him that there was no oil road. Inspection staff told him that no oil is right, because the East Hong-75 tractor engine crankshaft 5 main journal and main bearing oil, are from the host cylinder