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1.推土机发动机的曲轴及主轴承盖一台上海产T-320推土机,在操作过程中发现,发动机关机后不能立即熄火,而要以不稳定转速运转一段时间或者敲击PT泵电磁切断阀才能熄火。熄火后,柴油箱里的油在大气压力作用下,流经关闭不严的PT泵电磁切断阀,从喷油器的喷孔滴入气缸而流入油底壳。经一段时间后,曲轴箱内机油被严重稀释,从而导致发动机“抱轴”。
1. Bulldozer engine crankshaft and main bearing cap A T-320 bulldozer in Shanghai, found in the operation process, the engine can not be shut down immediately after shutdown, but to run at an unstable speed for some time or percussion PT pump electromagnetic cut-off valve Stalled. After the flame is turned off, the oil in the diesel tank flows under the pressure of the atmospheric pressure and flows through the PT pump electromagnetic shut-off valve which is not closed tightly to drip into the oil sump from the injection hole of the injector. After a period of time, the crankcase oil is severely diluted, resulting in the engine “axle.”