1、升降貨梯http://www.it616.com.cn/液壓泵站嚴重損壞。在低速運轉時泵站泄漏嚴重，高速運轉時，泵內壓力稍有提高，但由于泵的磨損及內泄，容積效率顯著下降，很難達到額定壓力。液壓泵長時間 工作又加劇了磨損，油溫升高，由此造成升降臺液壓元件磨損及密封件的老化、損壞，喪失密封作用，液壓油變質，最后導致故障發生。
Cargo lift pump stations severely damaged. At low speed pumping serious leakage, high-speed operation, the pump pressure is slightly increased, but due to wear and internal leakage of the pump, volumetric efficiency significantly decreased, it is difficult to reach the rated pressure. Pump wear and tear aggravated by long working hours,temperature rise, the resulting wear lifts hydraulic components and seals of aging, damage, loss of seal, hydraulic oil deterioration, leading to failure.
2、升降貨梯液壓元件選型不合理，動臂油缸規格為70/40非標準系列，密封件亦為非標準件，制造成本高且密封件更換不便，動臂油缸缸徑小，勢必導致系統調定壓力過高。
Cargo lifter unreasonable selection of hydraulic components, the boom cylinder non-standard specifications for the 70/40 series, the seal is also a non-standard parts, high manufacturing cost and inconvenience of replacing the seal boom cylinder bore small, will inevitably lead to the system set pressure too.
3、升降貨梯http://www.it616.com.cn/液壓系統設計不合理，升降貨梯操縱閥與全液壓轉向器為單泵串聯，安全閥調定壓力分16MPa，而液壓泵的額定工作壓力也為16MPa。液壓泵經常在滿負載或長時間超負荷(高壓)情況下工作，并且系統有液力沖擊，升降貨梯液壓油長期不換，液壓油受污染，加劇液壓泵磨損，以致液壓泵泵殼損毀。
Cargo lifter hydraulic system design is unreasonable, cargo lift control valve and hydraulic steering gear as a single pump series, the safety valve set pressure points 16MPa, while the rated working pressure of the hydraulic pump is 16MPa. Pumps often work at full load or prolonged overload (high pressure) situation, and the system has hydraulic shock cargo lifter does not change the long-term hydraulic oil, hydraulic oil contamination, increased pump wear and tear, so that the pump casing damage.
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