The crankshaft or the geometry of the cylinder block size error can make ablation of the crankshaft

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1) crankshaft radial beat super difference is bigger, the shaft neck with little or no bearing clearance gap, lubricating oil film thickness is not enough or no lubricating oil film.seale d ball bearing
2) cylinder main bearing hole coaxial degree of super bad, the main journal and the bearing gap is too small or no clearance, the lubricating oil film thickness is not enough or no lubricating oil film.
3) cylinder with the main bearing hole verticality super bad, the connecting rod axis neck, main shaft neck clearance is too small or no clearance, lubricating oil film thickness is not enough or no lubricating oil film.
In xinji or diesel engine is put into use after overhaul time is not long cases, tend to form the above phenomenon. Determine geometric size super bad parts can use first hand turn wave diesel engine crankshaft rotation (trouble), and then by cylinder loose discharge diesel engine main bearing cover and connecting rod bearing cover, then rotate the crankshaft. According to the rotation of the crankshaft torque size, these differences to be specified (but determine the size of super difference, is disintegrated diesel engine, with special fixture to determine).roller bearing co