3901090 Cummins Upper Main Bearing For 6BT5.9 Engines

3901090 STD Upper Main Bearing with thrust washers for Cummins 4BT 6BT 5.9 engines. Made of premium bimetal alloy for superior wear resistance and heavy load endurance. thrust washers stabilize crankshaft axial play. Direct replacement for engine overhaul, widely applied on trucks, generators and construction equipment.

3901090 Main Bearing Specification:

APPlication:

✅ Commercial Trucks: Dongfeng medium trucks, Dodge Ram 2500/3500, passenger coaches
✅ Construction Machinery: Excavators, wheel loaders, bulldozers, motor graders, road rollers
✅ Generator Sets: 30–160kW industrial standby & emergency diesel gensets
✅ Marine Equipment: Inland fishing boats, cargo vessels, marine auxiliary power units
✅ Special Equipment: Oilfield pumps, mining haulers, farm tractors & harvesters

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✅Genuine Cummins quality, cost-effective
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✅Global fast delivery in 5-7 days
✅Professional technical suppot