I have a Model 4D105-3 motor in my Komatsu D31S-16. The motor part number is, 63HP2350, sn 44393. Does anyone have the part numbers for crankshaft rod piston
Base on your sn 44393, the engine suppose to be 6D95 ealier modal or 6D102 for later. Suspect Engine has been replaced to 4D105-3, which is suppose to be lower sn. In any events, for 4D105-3 Piston, one of the Part Number is 6130-32-2110. Better to confirm the Piston Measurements during enquiry.