Special Offers
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4955858 Main Bearing(030)+0.75mm Set
Upgrade your Cummins Engine 4BT, ISF3.8, or QSF3.8 with the 4955858 Main Bearing(030)+0.75mm Set. This precision-engineered set ensures reliable performance and optimal durability for engine maintenance and repair needs. 4955858 Main Bearing Set PN NAME QTY...Sale price $69.95Regular price $88.65Sale price $69.95Regular price $88.65 -
4955860 Main Bearing Set
The 4955860 Main Bearing Set 010 +0.25mm offers precision fit and reliable performance for Cummins Engine 6BT5.9, ISBe5.9, and QSB6.7 models. Compatible with OE 3802071, this set ensures optimal engine function and durability. 4955860(Supersessions:3802071 Main Bearing...Regular price $99.40Regular price $99.40 -
4955861 Main Bearing Set
The 4955861 Main Bearing Set 020 +0.5mm is designed for Cummins Engine 6BT5.9, ISBe5.9, and QSB6.7 models. It replaces part 3802072, ensuring precise fit and performance for engine rebuilding and maintenance. 4955861(Supersessions:3802072 Main Bearing Set PN...Regular price $99.40Regular price $99.40 -
4955862 Main Bearing Set
The 4955862 Main Bearing Set 030 +0.75mm ensures precise fit and reliable performance for Cummins 6BT5.9, ISBe5.9, and QSB6.7 engines. Compatible with part 3802073, this set delivers optimal durability and engine support. 4955861(Supersessions:3802073) Main Bearing Set...Regular price $99.40Regular price $99.40 -
4999939 Main Bearing(Standard) Set
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...Sale price $239.95Regular price $345.65Sale price $239.95Regular price $345.65 -
5290097 Main Bearing(Standard) Set
Ensure optimal engine performance with the 5290097 Main Bearing (Standard) Set 4309117, designed specifically for Cummins Engine 4BT, ISF3.8, and QSF3.8. Precision-engineered for durability and reliable fit in professional engine rebuilds. 5290097(Supersessions:4309117) Main Bearing ( Standard...Sale price $69.95Regular price $86.54Sale price $69.95Regular price $86.54
Main bearings are precision-engineered bearings that support the crankshaft inside the engine block. They sit between the crankshaft's main journals and the engine block's bearing saddles, allowing the crankshaft to rotate smoothly at high speed while carrying the forces generated by combustion. They also maintain the critical oil clearance that allows a thin film of oil to separate the crankshaft from the bearing surface, preventing metal-to-metal contact.