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固定式升降機http://www.jxpj.com.cn/液壓系統本身具有很多優越性，但是由于油泵，閥類結構緊湊精密，使用中稍有不慎就會發生閥芯賭卡現象，從而使整個系統失靈，以造成不堪設想的嚴重后果，據統計固定式升降機系統故障70%以上是由于油液污染造成的。
Stationary hydraulic lift system itself has many advantages, but due to oil pump, valve structure compact precision, using slightly carelessly will spool gambling card phenomenon, so as to make the whole system failure, resulting in disastrous consequences, according to the statistics fixed lifting machine system fault 70% above is due to oil pollution. 
 
固定式升降機http://www.jxpj.com.cn/泵、換向閥、油缸等原件正常磨損會產生的金屬顆粒，密封元件磨損產生的橡膠制顆粒以及濾油器產生的脫落物，生產和維修過程中對原件的不恰當清洗時造成污染的主要原因。這種不恰當的清洗可使工作油液中出現棉紗等織物纖維，另外機械加工中產生的沙礫和碎片，焊接管路上的氧化物、熔渣及研磨后的殘余物等都可鞥污染油液。空氣中的塵埃，顆粒在打開泵和閥時也可能進入系統而造成污染，維修中由于固定式升降機操作不慎而混入污染物。
Fixed type lift pump, reversing valves, cylinders and other original normal wear will produce metal particles, sealing element abrasion of rubber particles and oil filter of exfoliation, in the process of production and maintenance of the original pollution caused by improper cleaning. The inappropriate washing oil in cotton woven fabric, also in machining of gravel and debris, welding pipe oxide, slag and after grinding the remnants are eng oil pollution. Dust in the air, particles in the open pump and valve may also enter the system and cause pollution, repair due to the fixed elevator operation accidentally mixed with pollutants.