This metal-rubber bushing is installed in the pivot arm of the cleaning-unit shaker assembly. It provides a flexible, wear-resistant connection that allows the arm to oscillate while dampening vibration transmitted from the sieve drive. As the rubber element ages, it hardens or cracks, leading to increased play in the linkage and uneven sieve movement that reduces cleaning efficiency. The original manufacturer's bushing uses a rubber compound bonded to the inner and outer metal sleeves, matching the original hardness and bond strength required for consistent damping. On installation, press the bushing into the arm bore and confirm the inner sleeve rotates freely against the pivot pin.