Komatsu 6271-31-1110 Crankshaft Assembly

This crankshaft assembly is manufactured from forged alloy steel using closed die forging process to withstand high combustion pressures in Komatsu SAA4D95LE series engines. It is designed as a direct OEM replacement for part numbers 6271-31-1110 and 6271311110. The component serves the 4-cylinder 3.3L displacement engine family (bore 95mm, stroke 115mm) utilized across hydraulic excavators, dozers, and loaders. It integrates main journals, rod journals, and counterweights balanced for the SAA4D95LE variable geometry turbocharged configuration. Verified fitment spans multiple engine build codes including -3, -5, -6, and -7 series.