170-09-13220 bearings are used in the Bulldozer Bearing system of Komatsu heavy machinery equipment：
170-09-13220 BEARING KOMATSU parts D150A, D155A, D155C, D155S, D155W
421-22-12790 bearings are used in the Loader Gearbox Bearing system of komatsu heavy machinery equipment：
421-22-12790 BEARING KOMATSU parts 542, 545, HM350, HM400, WA420, WA470
