Cummins 5253887 Intake Rocker Arm Assembly

This 6-piece intake rocker arm assembly is engineered for Cummins C Series 8.3 liter diesel engines including 6CT, 6CTA, ISC, QSC, and ISL configurations. The assembly comprises six individual intake rocker levers manufactured from forged alloy steel with hardened contact surfaces to withstand high valve train loads and thermal cycling. Each rocker arm features precision-machined pivot bores and roller contact tips designed to reduce friction and wear on the valve stem tips. The assembly replaces Cummins OEM part numbers 3934921, 3919435, 3901717, 3926429, and 3934916. It is compatible with CM850, CM2150, and CM2250 electronic control modules. This component is critical for maintaining proper valve lift timing and engine breathing efficiency in industrial and construction machinery applications.