Is there a pump to draw out the lubricating oil from the gearbox?
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The used oil inside the reducer cannot be completely drained. When replacing the reducer, it is necessary to remove the dirty oil from the bottom of the gearbox – is there any equipment for that?
The oil drain hole is generally sufficient to completely drain the waste oil from the reducer. If pumping is needed, a pneumatic diaphragm pump will work.
As for the oil pump, if there aren’t many, use a manual oil pumping unit
Yes, there are some. How about I buy one for you? . . . :P