Blocking the through hole of the vent cap or vent or the aperture is too small will affect the pressure equalization effect, which will cause the gearbox to leak oil. The simple and easy way to check is to open the upper cover of the vent cap and touch the vent hole. If you feel hot air, it means that the vent hole diameter is too small. You should enlarge the aperture or change a large vent cap to increase ventilation. The height of the cap increases the natural pumping force. This simple and effective method can effectively solve the fault of many gearbox oil leakage.
Eliminate the source of the leak. It is necessary to carry out the maintenance system for each class. When it is found that the oil is leaking, it is necessary to find the cause and implement the correct treatment to prevent secondary leakage. At this time, it is necessary to check the five main parts of the gearbox leakage: (1) the mating surface of the box and the lid; (2) the mating surface of the sight glass cover and the lid; (3) the oil level indicator and the box The mating surface of the body; (4) the joint of the gearbox output shaft and the sealing element; (5) the venting cap, the venting plug, and the like.
Strengthen the inspection of frequent points and replace the failed parts in time. The working environment of the gearbox is poor, and when the vibration is large, it is easy to cause looseness of the fastening bolt of the sealing structure. Therefore, during routine inspection and maintenance, pay special attention to check whether the fasteners are loose, and if it is loose, tighten it in time.
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