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故障现象 我单位一台小松ＰＣ２００－５型挖掘机，在施工作业中刚开始时出现回转偶尔迟滞现象，即有时快有时慢，很快就没有回转动作了。 故障原因分析 根据上述故障现象，我们认真研究了液压及电路图，本着“由表及里、先易后难”的原则，先从外部着手查找，即查回转制动部分
Symptom I units of a Komatsu PC200-5 excavator, construction operations at the beginning of the occasionally turning back to the phenomenon of occasional hysteresis, that is sometimes fast sometimes slow, and soon there is no turning action. Fault Analysis According to the above symptoms, we carefully studied the hydraulic and circuit diagram, the spirit of “by the table and the first easy after the difficult” principle, first from the outside to find, that check back to the brake part