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1故障现象一台加腾20t轮胎式起重机在坡道上行驶时突然不能前进,换其他各挡位仍不能前进,只能倒退到平路上检测维修。司机反映最近时有类似现象出现。该车液压原理图见图1。
1 Symptom A Canadian Teng 20t tire crane suddenly can not move forward on the ramp, for the other gear can not move forward, only to return to the flat road testing and maintenance. The driver reflected a similar phenomenon in recent days. The car hydraulic schematic shown in Figure 1.