Cummins 3073707 Crankshaft Assembly

The Cummins 3073707 crankshaft assembly is a precision-machined forged steel component designed for the 10.8-liter inline six-cylinder ISM11, M11, and QSM11 engine platforms. It converts reciprocating piston motion into rotational torque under high combustion pressures. The assembly includes main journals, rod journals, counterweights, and provisions for the crankshaft gear (part number 2882729EA). This component serves as a direct replacement for Cummins OEM part numbers 3073707, 2882729, and 2882730. It is applicable to heavy-duty on-highway trucks, vocational dump trucks, construction equipment, marine propulsion, and power generation units. Manufacturing adheres to OEM metallurgical specifications for journal hardness, surface finish, and dimensional tolerances to ensure bearing clearance integrity and fatigue resistance.