1.The connecting rod of diesel engine is divided into various levels,and it should be noted that different levels of connecting rod cannot be changed in the maintenance.If the connecting rod cover is messed up in the maintenance because of carelessness and not carefully,it will cause the connecting rod big head joint surface is not closely matched,and the connecting rod cover will be loose in the engine operation,resulting in the fracture of the connecting rod bolt of the fishtail plate.
2.The material problems,processing defects and heat treatment process problems of the fishtail bolt will also lead to the fracture of the connecting rod bolt during engine operation.
3.During assembly,the tightening torque is too large,the force is not uniform,and the tightening torque is too large,which exceeds the yield limit of the bolt material of the
Fish Plate,resulting in the yield deformation of the connecting rod bolt,and the fracture due to excessive elongation under the impact load.
