Komatsu OEM Number: 561-22-72520 (also referenced as 5612272520)
Function: Bearing used in the rear axle final drive (left and right) of models like HD7857, HD7858 dump trucks
Package Weight: approximately 14.0 kg (30.9 lb)
Shape and Size: Standard heavy-duty axle final-drive bearing—large diameter and width to support heavy off-road loads.
Exact internal dimensions (outer diameter, inner diameter, width) are not publicly listed—these must be confirmed with a Komatsu parts catalog or OEM technical datasheet.
Bearing Type: While not explicitly described, it’s almost certainly a large cylindrical or tapered roller bearing, engineered for high radial and axial load in heavy drive applications.
Typical Use: Final drive unit in Komatsu HD785 series dump trucks – supports planetary gear sets and wheel axle assemblies
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