832869M1 New Tractor Knife Drive Belt Fits Massey Ferguson 300One New Aftermarket Replacement Knife Drive Belt Fits Massey Ferguson (MF) 300 Combine This aftermarket replacement knife drive belt is Fits Massey Ferguson 300 combine. The knife drive belt powers the reciprocating cutter bar on the combine header, transmitting torque from the drive system to the cutting knives during harvest. Note the serial number restriction below verify your combine serial number before ordering. Serial Number Restriction Fits