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 |
Condition:New / OEM Quality
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