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Cummins

Lubricating oil pump for Cummins 6BTAA5.9-C178

P/N 4003950

This lubricating oil pump, part number 4003950, circulates oil through the engine to maintain pressure and lubrication for moving internal components. It is compatible with Cummins 6BTAA5.9-C178, KTA38C-1050, QSM11-C335, and QSM19-C700 engine models.

Specifications

Part number
4003950
Brand
Cummins

The lubricating oil pump is a critical component for maintaining the internal health of Cummins diesel engines. Its primary function is to draw oil from the sump and circulate it under pressure to all moving parts, including the crankshaft, connecting rods, pistons, camshaft, and turbochargers. By providing a consistent flow of lubricant, the pump reduces friction between metal surfaces, helps dissipate heat, and aids in cleaning internal engine galleries. Proper oil circulation is necessary to protect these components from premature failure during operation.

This specific unit is compatible with several Cummins engine models, including the 6BTAA5.9-C178, KTA38C-1050, QSM11-C335, and QSM19-C700. These engines are frequently utilized in heavy machinery such as industrial cranes, construction equipment, mining trucks, and power generation sets. The pump is engineered to maintain the required oil pressure and flow rates across the full operating range of these engines.

In most heavy-duty engine applications, oil pumps utilize either gear or rotor designs to generate the necessary hydraulic force. These pumps are mounted within the engine block or front cover assembly and are typically driven by the engine's timing gears or crankshaft. Consistent oil pressure is vital for preventing metal-to-metal contact within the bearings and maintaining the thermal stability of the engine assembly.