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我公司的楚天ＩＰＦ－８５Ｂ型硅泵车在路桥施工泵送大方量砼时突然出现下述故障：泵车在无负荷泵送时发动机转速自１８００ ｒ／ｍｉｎ降至１５００ｒ／ｍｉｎ；在主液压缸换向时发动机转速又降至 １１００ ｒ／ｍｉｎ，此时臂架管即使在水平状态，砼也泵送不出。 该机的主液
My company’s Chutian IPF-85B-type silicon pump in the road and bridge construction pumping generous volume of concrete suddenly appeared the following failure: pump load in the no-load engine speed from 1800 r / min to 1500r / min; in the Lord When the hydraulic cylinder commutation engine speed dropped to 1100 r / min, this time even if the boom tube horizontal state, the concrete can not be pumped. The main liquid of the machine