Caterpillar(CAT) D6D Track Roller
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This bottom roller is widely recognized with part number 1181617, 7G0423, 9G8034, 118-1617, 118-1618, 7G0421, 9G8029. It applies to Caterpillar D6D dozer. Forged with premium 50MnB manganese steel alloy. Unique structure design prevents the bushing from loosening. The surface hardness is 56°-62° HRc. The shell is totally heat-treated to maximize wear life.
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