Product Overview

The Cummins OEM Lubricating Oil Pump 4003950 is a precision-engineered gear pump designed to maintain optimal oil pressure and circulation throughout the engine. Built to exact factory specifications, it ensures reliable delivery of clean oil to critical components, preventing wear, overheating, and potential catastrophic failures in high-load operations.

Volgen Power supplies authentic Cummins OEM oil pumps, providing superior materials, tight tolerances, and proven performance that aftermarket units often cannot match.

Key Performance Benefits

• Consistent Oil Pressure — Gear-driven design delivers steady flow across RPM ranges for reliable lubrication
• High-Volume Capacity — Optimized for 10-11L engines, supporting heavy-duty cooling and bearing protection
• Durable Construction — Premium gears and housing resist wear, cavitation, and contamination
• Reduced Engine Wear — Maintains proper oil delivery to pistons, bearings, turbo, and valve train
• Direct OEM Replacement — Exact fit with factory mounting and drive for quick, hassle-free installation

Engine Compatibility

Fully compatible with Cummins models:

• L10
• M11 (CELECT and mechanical)
• ISM11
• QSM11 (marine and industrial ratings)
• Related variants across emissions platforms

Common in trucks, buses, generator sets, marine propulsion, and construction equipment.

Technical Specifications

Volgen Power stocks genuine Cummins OEM oil pumps like the 4003950 for immediate worldwide shipping.

Keep your engine properly lubricated and protected – contact us today for pricing, availability, or technical support. Get your quote now!