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丰台机务段配属的0334号东风4型内燃机车的0423号柴油机上装有新型薄壁球墨铸铁活塞。这批活塞曾在0282号柴油机上经过了500小时耐久试验和100小时可靠性试验,累计了726小时。于1979年12月29日投入运用,至1981年1月18日已运行213127公里,按丰台机务段机车检修计划,由大连机车车辆工厂、戚墅堰机车车辆工艺研究所、大连内燃机车研究所、大同机车工厂、北京铁路局科研所等单位到段参加拆检工作。现将拆检情况介绍如下:
Attached to the Fengtai locomotive depot No. 0334 Dongfeng 4 diesel locomotive No. 0423 diesel engine equipped with a new type of thin-walled ductile iron piston. The Pistons had a 500-hour durability test and a 100-hour reliability test on 0282 diesel engine for a total of 726 hours. It was put into operation on December 29, 1979 and has run 213,127 km on January 18, 1981. According to the locomotive maintenance plan of Fengtai Locomotive Depot, the project was started from Dalian Locomotive and Rolling Stock Plant, Qi Shuyan Rolling Stock Technology Research Institute, Dalian Diesel Locomotive Research Institute, Datong Locomotive factory, Beijing Railway Bureau, scientific research institutes and other units to participate in the dismantling inspection work. Now the demolition inspection situation is as follows: