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一台宝马BW219DH-3单钢轮振动压路机出现行走无力的现象。停机检查,首先检测行走泵补油压力为2.4MPa(正常值);然后拔掉刹车电磁阀,使压路机处于刹车状态下,将行走操纵杆向前推10s左右,检测行走压力只有27MPa,达不到正常压力值42MPa。这说明行走系统有泄漏,压力达不到标准。于是
A BMW BW219DH-3 single-drum vibratory roller walking weak phenomenon. Shutdown inspection, the first test of walking pump charge pressure of 2.4MPa (normal); and then unplug the brake solenoid valve, the roller is in braking state, the walking joystick pushed forward 10s or so, testing the walking pressure is only 27MPa, up to To the normal pressure value of 42MPa. This shows that there is a leakage of the walking system, the pressure fails to meet the standards. then