1台配装康明斯6C8.3型柴油机的挖掘机,在工作80~100h后出现“憋车”、动臂提升缓慢、柴油机失速严重现象。经分析,该挖掘机出现以上故障的原因可能有以下几点:一是挖掘机控制程序出现异常;二是空气滤清器滤芯堵塞,造成空气进气量不足;三是燃油泵供油压力不足或燃油管路进油阻力过大,造成供油量不足;四是液压系统存在故障。对挖掘机进行程序重刷后试机,故障依然存在;将空气滤清器打开,其滤 A Taiwan equipped with Cummins 6C8.3 diesel excavator, after 80 ~ 100h work appear “Catch ”, boom lift slow, serious diesel stall phenomenon. After analysis, the excavator may cause the above failures may have the following: First, excavator control program abnormalities; Second, the air filter plugged, resulting in insufficient air intake; Third, the fuel pump insufficient supply pressure Or fuel pipeline into the oil resistance is too large, resulting in insufficient fuel supply; Fourth, hydraulic system failure. On the excavator after the program heavy brush test, the fault still exists; the air filter open, the filter