The kit is installed at the front end of the crankshaft, where the shaft passes through the oil pan/front cover. The oil seal keeps the lubricating oil inside the engine while the crankshaft rotates at high speed.
Used primarily in the Cummins L10, M11, ISM, and QSM11 engine families.
Final compatibility must be verified using the ESN (Engine Serial Number) or CPL, because Cummins may use different configurations of the same engine.
Main crankshaft bearings 0.010” undersize, equivalente a 0,25 mm; Cummins lists part number 4025121 primarily for non-certified 11-liter M11 engines; other catalogs also list it for the L10, ISM, and QSM11 families.
Exact compatibility must be confirmed with the ESN/CPL, as it may vary depending on the crankshaft configuration.