Description

The MB-3901170 STD Main Bearing Set is a premium OEM-quality, standard-size crankshaft bearing set engineered to restore smooth engine rotation, stabilize oil pressure, and prevent crankshaft wear in heavy-duty diesel engines. These bearings provide precise crankshaft support, reduce friction, and ensure long-lasting reliability under high load and high-temperature operating conditions. Manufactured from high-strength tri-metal bearing alloys, the bearings deliver exceptional durability, resistance to fatigue, and consistent performance even in severe-duty applications. When main bearings wear out, engines may experience low oil pressure, knocking sounds, vibration, and premature crankshaft damage. Replacing them with the MB-3901170 STD set restores proper clearances and ensures smooth, balanced crankshaft movement. This main bearing set directly replaces OEM 3901172 , providing exact fitment for rebuild shops, fleet maintenance operations, and professional diesel engine overhauls. Key Features & Technical Advantages OEM-spec MB-3901170 STD main bearing set Direct replacement for OEM 3901172 Standard size – restores correct crankshaft oil clearances Tri-metal alloy construction for maximum strength & heat resistance Reduces friction, knocking, vibration & crankshaft wear Helps maintain consistent oil pressure & smoother engine operation Ideal for rebuilds, in-frame overhauls & preventive engine maintenance Ensures long-term stability in heavy-duty diesel applications