John Deere 4443884 Arm Bushing

The 4443884 arm bushing is a critical pivot component designed for the boom-to-arm and arm-to-bucket linkages on mid-to-large size hydraulic excavators. Manufactured to OEM specifications using through-hardened alloy steel, it provides high wear resistance and load-bearing capacity under severe articulation cycles. This bushing replaces John Deere OEM 4443884, AT250025 and cross-references Hitachi 4381854, 4381855, AT250026. It features precision ground inner and outer diameters to maintain pin clearance tolerances and prevent premature structural fatigue. Surface treatment includes phosphate coating for corrosion protection during storage and initial operation.