fuel filter cummins part no 3978040 or fleet guard part no ff5612 for cummi ns engine model qsb6 1 of mdu machine make cummins warranty period 12 months after the date of delivery fuel filter cummins part no 3978040 or fleet guard part no ff5612 for cummi ns engine model qsb6 1 of mdu machine make cummins warranty period 12 months after the date of delivery lt 224 lube oil filter cartridge lub oil filter cummins part no 3937736 w arranty period 12 months after the date