Why do you need to add half of the gear oil in the gearbox?

Position of the final drives on the excavator

Why do you need to add gear oil?

This is because there are multiple sets of planetary gears in the final drive motors. When the excavator is walking, the gears inside are rotated at high speed, so it is necessary to add gear oil for lubrication.

Walking gear reducer inside multiple sets of gears

Why do you only need to add half of the location?

The travel reducer is a closed space. After the gear reducer is filled with gear oil, the gear oil will increase in volume due to “hot long shrinkage” for a long time, and the gear oil itself is very compressible, so it is easy to put The oil seal broke.

Excavator travel reducer appearance

In addition, when the travel motors gears are all immersed in the gear oil, the resistance to running will be greatly increased, the friction will increase, and more heat will be generated.

When half of the gear oil is added, since the air in the other half of the reducer has better compressibility, even if the temperature of the gear oil increases and the volume expands, the oil seal will not be excessively squeezed and the deceleration can be maintained. The closed state of the device.

The travel reducer has a refueling bolt in the middle position, and can also act as a half-viewing port. https://www.spfinaldrives.com/

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