Komatsu 21T-72-15850 Bushing | Heavy-Duty Hydraulic Cylinder Pivot Bushing

The Komatsu 21T7215850 (21T-72-15850) is an authentic OEM-grade replacement bushing engineered to withstand severe radial loads, heavy shock cycles, and intense friction in demanding mining and earthmoving applications. Primarily utilized in heavy excavator arm cylinders, bucket cylinders, and wheel dozer tilt cylinders, this bushing ensures precise pin alignment and smooth articulation under extreme working conditions.

Manufactured from high-tensile alloy steel and precision case-hardened, the 21T-72-15850 delivers superior wear resistance, anti-galling performance, and fatigue strength. It incorporates internal lubrication channels to optimize grease distribution across high-stress contact zones, minimizing friction and extending the operating life of mating linkage pins and cylinder eyes. Designed to direct factory tolerances for mining-class equipment—including Komatsu PC1600, PC1800 excavators, and WD900 series wheel dozers—this component reduces equipment downtime, prevents joint ovalization, and restores structural integrity to hydraulic linkage assemblies.