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Main Bearing Set Cummins 4025128 / 4025123 | 3801153, 3400713, 171728, 171869
Restore your engine’s bottom end with this high-durability 0.75mm (.030″) oversize main bearing set designed for Cummins L10, M11, ISM, and QSM11 diesel engines.
Description
High-Performance Main Bearing Set for Cummins L10, M11, ISM, and QSM11
Keep your heavy-duty diesel engine running smoothly with this premium aftermarket main bearing set, available under part numbers 4025128 and 4025123. Engineered to withstand extreme loads and high-temperature environments, these bearing shells provide critical crankshaft support, reducing friction and preventing premature engine wear. This set features a 0.75mm (.030″) oversize dimension, making it the perfect choice for crankshafts that have been machined to a second undersize journal specification.
This part is also available under the numbers: 3801153, 3400713, 171728, and 171869. Depending on your specific engine build and manufacturing date, you will need to verify your thrust washer configuration. Part number 4025128 is designed for engines utilizing non-tabbed (roll-pin design) thrust washers, while part number 4025123 is engineered for engines with tabbed (outer diameter tab) thrust washers.
Engine Compatibility & Fitment
This main bearing set is designed for a wide range of mid-range and heavy-duty Cummins diesel engines, including:
- Cummins L10 Series: L10, LT10, LTA10
- Cummins M11 Series: M11, M11 Celect, M11 Celect Plus
- Cummins ISM Series: ISM 11
- Cummins QSM Series: QSM 11
Technical Specifications
- Oversize Dimension: +0.75 mm (+0.030 in)
- Standard Journal Size Range: 113.990 mm – 114.055 mm / 121.990 mm – 122.015 mm
- Bearing Width: 36.6 mm
- Material: High-durability sintered tri-metal (copper/lead/tin alloy with nickel dam and Babbitt top layer) for superior fatigue resistance and load-carrying capacity
- Note: This set does not include thrust washers. Please ensure you order the correct thrust washer design (tabbed or non-tabbed) to match your crankshaft configuration.
Cross-Reference / Interchange Part Numbers
This part replaces / is interchangeable with the following part numbers:
- 4025128
- 4025123
- 3801153
- 3400713
- 171728
- 171869
- 231184
