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(二)曲轴连杆机构的维修 1.曲轴的维修 柴油机大修时,曲轴应进行磁力探伤检查,探伤后应进行退磁;检查主轴颈、连杆轴颈和止推轴颈止推面上的磨损、划痕、烧伤等情况,如有损伤,应按规定的技术要求进行修磨;检查前、后油封轴颈,如有划伤、磨损沟槽等,应修磨(B系列柴油机还可采用修磨后镶套的方法进行修复);检查轴承表面,如有损伤、剥落或严重磨损等缺陷,应予以更换;检查轴承定位凸台,如凸台已损坏或变形,应更换轴承;检查曲轴的轴向窜动量,曲轴的轴向
(B) maintenance of crankshaft connecting rod mechanism 1. Crankshaft maintenance Diesel overhauls, the crankshaft should be magnetic inspection, demagnetization should be detected after the test; check the main journal, connecting rod journal and thrust shaft neck thrust surface wear , Scratches, burns, etc., if damaged, should be grinding according to the technical requirements; check before and after the oil seal journals, scratches, wear grooves, etc., should be grinding (B series diesel engine can also be used Should be replaced after inspection; if the boss has been damaged or deformed, the bearing should be replaced; check the crankshaft The amount of axial movement, crankshaft axial