4125A发动机在经过大修理以后,容易发生串烧机油现象,造成发动机功率下降、耗油量增加、发动机易发生故障等后果。新青林业局机修厂采取了如下几种防治办法:为解决因活塞环下沉量偏大造成串烧机油的问题,在修理时,可采取用加大级活塞改成标准活塞、(如+O.25,+O.50)的办法。改制时,将活塞卡在车床上,用磁力表座及百分表校正,使其摆差不超过0.03毫 4125A engine after overhauling, easy to skewer oil phenomenon, resulting in decreased engine power, fuel consumption increases, the engine prone to failure and other consequences. Xinqing Forestry Bureau machine repair plant adopted the following methods of prevention and treatment: In order to solve the problem caused by the excessive piston ring sinking skewer oil, during repair, can be used to increase the level of piston into a standard piston (such as + O.25, + O.50) approach. Restructuring, the piston stuck in the lathe, with a magnetic table seat and dial indicator correction, so that the deviation does not exceed 0.03 milliseconds