1992年我们曾修理过一台4146发动机,该机送修的原因是因缺机油而烧瓦。因烧瓦前机况良好,用户只要求修复曲轴,经解体全面检查后知,除曲轴轴颈和连杆轴颈有较明显干磨印痕外(机油泵失效),其余各部分(活塞、缸套、连杆、活塞销及气门等)良好。由于我处无曲轴磨床,只好将曲轴送别处磨削,因该曲轴在此之前已磨削过一次(一级),此次印痕较深,磨完后我们采用了加大三 In 1992, we had repaired a 4146 engine. The reason for the repair was to burn the tiles due to lack of oil. Due to the good condition before burning tiles, the user only requires repair of the crankshaft. After comprehensive inspection of the dismantling, it is known that the crankshaft journal and the connecting rod journal have more pronounced dry-grinding marks (oil pump failure), and the remaining parts (pistons, cylinders) Sets, connecting rods, piston pins, valves, etc. are good. Because I don't have a crankshaft grinder, I had to grind the crankshaft to the other place, because the crankshaft has been ground once before (a), the deeper impressions, we used the increase after grinding