Copper sleeves can be used in various parts of an excavator to provide a low-friction surface for rotating or sliding components. Here are some of the functions of copper sleeves in an excavator:

Pivot points: Copper sleeves can be used in the pivot points of an excavator, such as the boom and arm joints, to reduce friction and wear between the metal components. This helps to extend the life of the components and reduce maintenance requirements.
Hydraulic cylinders: Copper sleeves can also be used in the hydraulic cylinders of an excavator, where they provide a smooth, low-friction surface for the piston to move against. This reduces wear on the cylinder walls and helps to maintain the performance of the hydraulic system.
Gearbox: Copper sleeves can be used in the gearbox of an excavator to provide a low-friction surface for the gears to rotate against. This helps to reduce wear on the gears and other components, and ensures that the gearbox operates smoothly and efficiently.

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