我段配属的东风型内燃机车的动力装置为10L207E 型柴油机,其机体为焊接结构,由20号钢钢板拼焊而成。由于我段担负的金城江—麻尾区段是一个运行条件比较困难的区段,柴油机经常在满负荷下工作,工况比较恶劣,所以在柴油机机体上、下曲轴主轴承座 V 形坡口焊缝处产生裂纹的比较多。自1973年开始,我段对机体进行焊修,至 I section of the Dongfeng diesel locomotive power plant 10L207E type diesel engine, the body of the welding structure, made of 20 steel welded together. Due to the segment of Jinchengjiang-Ma tail borne by me is a section with relatively difficult operating conditions, diesel engines often work under full load and the working conditions are relatively poor. Therefore, on the engine body of a diesel engine, the V-shaped groove weld of the main bearing of the lower crankshaft Crack at the cracks are more. Since 1973, I have been repairing the fuselage to the body