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发动机喷油时刻的正确与否对其工作性能有着十分重要的影响。D80A-12型推土机的寇明斯发动机配有PT燃油系统,其喷油正时的检查和调整方法与一般常见柴油机是完全不同的。该发动机必须在装配时检查喷油时刻并进行正确的调整,否则在车上不便于检查和调整。对于大修后的发动机,特别是对正时齿轮、凸轮轴、随动臂进行了修理或已拆下随动臂后盖和调整垫片者,都必须进行喷油正时的检查和调整。
The correctness of the engine fuel injection timing has a very important influence on its performance. The diesel engine of the D80A-12 bulldozer is equipped with a PT fuel system. The inspection and adjustment methods of fuel injection timing are completely different from those of common diesel engines. The engine must check the fuel injection timing and make the correct adjustment during assembly, otherwise it is not easy to check and adjust on the vehicle. For overhauled engines, especially when the timing gear, camshaft, follower arm has been repaired, or if the follower arm rear cover and spacers have been removed, the injection timing check and adjustment must be performed.