Komatsu 707-46-11520 Bushing | Heavy-Duty Hydraulic Cylinder Pivot Bushing

The Komatsu 707-46-11520 bushing is an OEM-specification replacement component engineered for demanding pivot joints and hydraulic cylinder linkage assemblies across heavy-duty Komatsu hydraulic excavators. Manufactured from high-grade, heat-treated alloy steel, this bushing is precision-machined to absorb extreme radial loads, dynamic shear stress, and high-frequency cyclical motion encountered during rigorous digging, loading, and quarrying operations.

Featuring induction-hardened wear surfaces and integrated internal grease grooves, the 707-46-11520 promotes continuous lubricant distribution to minimize friction, galling, and pin seizure. Its tight dimensional tolerances ensure a secure press-fit installation into machine pin bores, restoring factory alignment and reducing excess play between boom, arm, and hydraulic cylinder mounting points.

Designed primarily for heavy mining and production-class excavators—including the PC650, PC750, PC800, PC850, and PC1000 series—this structural bushing serves critical boom cylinder and work equipment pivot joints. Replacing worn bushings with the 707-46-11520 mitigates structural fatigue on pins and housings, extends maintenance intervals, and protects expensive linkage structures against premature failure.