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4125系列发动机的气缸体由于使用和维修不当,有时上平面会翘曲,需要在专用磨床上磨修。磨修以及磨修后应注意以下几个问题: (1)在保证气缸体上平面全长范围内高低差不超过0.10毫米的前提下,尽量少磨;最大磨削量不大于0.90毫米,以使机体总高度不少于648.70毫米。 (2)磨修后,为保证缸套凸肩不凸出机体平面过高,可车削缸套台肩下缘,使缸套凸肩凸出机体平面在0.15～0.20毫米的范围内。 (3)如果原机使用的缸套内表
4125 series engine cylinder block due to improper use and maintenance, and sometimes the plane will be warped, you need to grind on a dedicated grinder. After grinding and grinding repair should pay attention to the following questions: (1) to ensure that the level of the cylinder block on the plane within the scope of height difference of not more than 0.10 mm under the premise of minimal grinding; maximum grinding amount of not more than 0.90 mm So that the total body height of not less than 648.70 mm. (2) grinding repair, in order to ensure that the cylinder shoulder does not protrude the body plane is too high, the lower edge of the cylinder liner can be turned so that the cylinder liner protruding body plane in the range of 0.15 ~ 0.20 mm. (3) If the original machine used cylinder liner