1、觀察升降貨梯http://www.it616.com.cn/外表的不正常現象，漏油、沾污、郵箱油量及油液污濁情況；觀察油中的氣泡情況，可以判斷出系統進氣的程度，進而排除與系統進氣有關的故障；觀察系統總回油管的回油情況，可以判斷出液壓泵工作是否正常，為排除系統故障提供重要參考。
Irregularities observed Huoti appearance, oil spills, stains, oil and oil polluted situation mailbox; bubbles were observed in the case of oil, can determine the extent of the intake system, and then exclude the intake system related failures; the case back to the oil return pipe of the total observation system can determine whether the pump is working properly, providing an important reference for troubleshooting the system.
2、用耳朵聽升降貨梯工作時的振動、噪聲、不正常的響聲或抖動，通過對各個部位進行探聽，可直接找出噪聲產生的部位，探聽時通常采用一根細長的銅管，一般噪聲比較大、聲音清晰處就是噪聲產生的部位。
Listen with the ears of vibration cargo lifter at work, noise, abnormal sound or vibration, through the various parts of Snoop directly identify the parts of the noise generated, usually when a slender brass snoops, general noise is large parts of the sound is clear is that it is noise.
3、溫度不正常和振動故障，通過用手摸的辦法即可找出故障部位，對于液壓泵和管道局部過熱故障采用手摸方法更為有效。
Abnormal temperature and vibration fault, you can find out the fault location by touching the way by hand, more efficient pumps and piping for the use of local overheating fault hand touch method.
4、聞一聞升降貨梯http://www.it616.com.cn/油液是否有異味變質，油液嚴重變質影響液壓系統的正常潤滑，必修換新油。
Smell is the smell of oil cargo lifter deterioration, oil serious deterioration affecting the normal lubrication of the hydraulic system, compulsory renewal of oil.
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