First, the reason for entering the water
1. Mild water intake: some screws in the gearbox are rusty
If you can’t judge with the above two methods, you need to disassemble to observe the screws inside the gearbox. Because the oil and water are mixed, the screws of the steel material will be corroded. If the gearbox is suspected to have some screws rust after entering the water, it can be judged that the gearbox is slightly influent and the water content is not too large.
2. Moderate water ingress: white deposits appear in the oil sump
If it is not possible to determine if water is being introduced by draining oil, further inspection is required at this time. The specific method is to disassemble the oil pan for observation. Because if the gearbox is flooded, the oil and water will produce a white emulsion that will adhere to the oil sump. If such a deposit is observed, the gearbox is already moderately flooded.
3. Severe water intake: observe the oil and water mixture to distinguish
If the water in the gearbox is serious, it can be directly observed by draining oil. The specific method is to discharge the oil in the gearbox. If the water is more, observe the color and viscosity of the oil-water mixture.
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Second, the solution
1. Slight water intake: It is best to replace the transmission oil and differential oil
The maintenance method for slight water intake is similar to moderate water intake, but it is mainly based on prevention. It is best to replace the rubber ring, oil seal, friction plate and other parts to extend the service life, and it is recommended to replace the transmission oil and differential oil.
2. Moderate water intake: friction plates, oil seals, etc. must be replaced
Moderate water intake requires much less replacement than severe influent water, but parts such as aprons, oil seals, friction linings, and transmission and differential oils must be completely replaced. If the components such as the automatic multi-function switch are wading, they also need to be replaced.
3. Severe water intake: at least three need to be replaced
There are a lot of parts that need to be replaced in the gearbox with serious water inflow. There are six maintenance items listed below. The first three must be implemented: first, the rubber-like components such as rubber rings and oil seals should be replaced. Second, the friction should be replaced. Because the friction plate is composed of steel sheet and high-density lignin material, it will affect the friction effect when it is swollen with water. Third, it needs to completely replace the transmission oil and differential oil. Fourth, it needs to be seriously filled. Replace the sprocket; fifth, whether to replace the valve body of the gearbox depends on the situation, because if the gearbox water lubrication effect will be weakened; sixth, if the automatic gear multi-function switch and other components wading must also be replaced.
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