Cummins 3819774 Rear Crankshaft Wear Sleeve

The Cummins 3819774 is a rear crankshaft wear sleeve designed to restore the sealing surface on worn crankshaft journals. Manufactured from stainless steel, it provides a hardened, corrosion-resistant running surface for the rear crankshaft oil seal. This component is critical during engine overhauls where the original crankshaft surface exhibits grooving or wear that would compromise seal integrity and cause oil leakage. The sleeve features a 6.5-inch (165.1 mm) shaft diameter and a 7-inch (177.8 mm) outside diameter. It is a direct replacement for Cummins OEM part number 3819774 and interchanges with Mack 1458-99650 and PAI 136042. Installation requires proper tooling to press the sleeve onto the crankshaft without distortion. Applicable to Cummins L10, M11, ISM, and QSM engine platforms used in heavy-duty truck and industrial applications.