Over-greasing the slew ring, while seemingly beneficial, can negatively impact its longevity by causing seal damage and attracting contaminants. The slew ring, or swing bearing, is a large bearing that allows the excavator's upper structure to rotate smoothly. It requires regular greasing to maintain proper lubrication and reduce friction between the rolling elements (balls or rollers) and the raceways. However, excessive grease can over-pressurize the seals that retain the grease within the bearing. These seals are designed to....
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