1、观察升降货梯http://www.jntr168.com/外表的不正常现象，漏油、沾污、邮箱油量及油液污浊情况；观察油中的气泡情况，可以判断出系统进气的程度，进而排除与系统进气有关的故障；观察系统总回油管的回油情况，可以判断出液压泵工作是否正常，为排除系统故障提供重要参考。
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、用耳朵听升降货梯工作时的振动、噪声、不正常的响声或抖动，通过对各个部位进行探听，可直接找出噪声产生的部位，探听时通常采用一根细长的铜管，一般噪声比较大、声音清晰处就是噪声产生的部位。
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、温度不正常和振动故障，通过用手摸的办法即可找出故障部位，对于液压泵和管道局部过热故障采用手摸方法更为有效。
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、闻一闻升降货梯http://www.jntr168.com/油液是否有异味变质，油液严重变质影响液压系统的正常润滑，必修换新油。
Smell is the smell of oil cargo lifter deterioration, oil serious deterioration affecting the normal lubrication of the hydraulic system, compulsory renewal of oil.