OEM-quality Part No. 4999939 Standard Main Bearing Set, interchangeable with 4999940 and 2873959, is designed for Cummins ISZ, QSZ, Z13, ISX12 and QSX11.9 heavy-duty engines. Precision-machined from high-grade leaded bronze alloy with a wear-resistant overlay, it delivers exceptional load capacity, friction reduction and long service life, maintaining precise crankshaft clearance for optimal engine performance.
| PN | NAME | QTY |
|---|---|---|
| 4999939 | MAIN BEARING | 7 |
| 4999940 | MAIN BEARING | 7 |
| 2873959 | CRANKSHAFT THRUST BEARING | 4 |