Final drive removed from an 1992 Komatsu PC220LC-5L Excavator. It was used in a corrosive environment, and the bolts for the cover have the heads heavily rusted, some are even missing, but the gear oil is clean inside and the gears look excellent. The machine was working and tracking fine when dismantled. It had 2345 hours on it. Machine serial number is A70494.
Number on sprocket hub is 20Y 27 13120.