The company's long-term operation of Cummins 4BT, 6BT, 6CT, 6L, ISBE, ISLE, ISDE, QSB, QSX, ISF2.8, ISF3.8, ISM, KTA19, KTA38, M11, NTA855 four matching engine (piston, piston ring, piston pin, connecting rod, cylinder), water pump, fuel pump, sensor, solenoid valve, generator the starter, cylinder head, cylinder and engine assembly.