Description

The Cummins Connecting Rod Bearing 3901430 (STD) is a precision-engineered standard-size rod bearing designed for Cummins 6CTA and 6CTAA 8.3 diesel engines using piston 9247 . This bearing supports the connecting rod journal on the crankshaft, maintaining proper oil clearance and ensuring smooth, reliable engine operation. Manufactured to OEM specifications , the Cummins 3901430 rod bearing is built from high-quality bearing materials that deliver excellent load-carrying capacity, resistance to fatigue, and consistent lubrication under heavy-duty conditions. Proper rod bearing fitment is critical to reducing friction, controlling oil pressure, and preventing premature crankshaft or connecting rod damage. This standard rod bearing is commonly installed during engine overhauls, in-frame rebuilds, and bottom-end repairs where the crankshaft journals remain within factory specifications. When paired with the correct main bearings and piston components, it helps restore factory-level performance and long service life. The Cummins 3901430 connecting rod bearing is ideal for professional engine builders, diesel repair shops, and fleet maintenance operations servicing Cummins 8.3L engines.