3950005
Lubricating Oil Pump
Cummins®

Introduction

The Cummins 3950005 Lubricating Oil Pump is a component designed to facilitate the circulation of lubricating oil within the engine of commercial trucks. Its role is to ensure that all moving parts within the engine receive adequate lubrication, which is vital for the smooth operation and longevity of the engine. This pump is integral to maintaining the efficiency and reliability of commercial truck engines.

Basic Concepts of Lubricating Oil Pumps

Lubricating oil pumps are fundamental to the lubrication systems of engines. They work by drawing oil from the oil pan and distributing it under pressure to various engine components. There are several types of oil pumps, including gear, rotor, and vane pumps, each with distinct mechanisms for oil delivery. The primary function of these pumps is to reduce friction between moving parts, cool the engine, and remove contaminants ¹.

Purpose and Role in Truck Operation

The Cummins 3950005 Lubricating Oil Pump is specifically engineered to meet the demanding requirements of commercial truck engines. It ensures consistent oil flow to critical components such as the crankshaft, camshaft, and valve train. By maintaining proper lubrication, this pump helps in reducing wear and tear, enhancing engine performance, and extending the engine’s operational life ².

Key Features

The Cummins 3950005 Lubricating Oil Pump is characterized by its robust design and the use of high-quality materials. It features a durable housing, precision-machined components, and advanced sealing technology. These elements contribute to its reliability and efficiency in high-stress environments typical of commercial trucking operations.

Benefits

The advantages of the Cummins 3950005 Lubricating Oil Pump include improved engine efficiency through reduced friction, minimized wear on engine components, and enhanced overall reliability. Its efficient design ensures that the engine operates smoothly, which can lead to better fuel economy and reduced maintenance costs over time.

Installation and Integration

Proper installation of the Cummins 3950005 Lubricating Oil Pump involves several steps to ensure it functions correctly within the engine system. It is important to follow manufacturer guidelines for alignment, securing the pump in place, and connecting it to the oil passages. Careful attention to these details helps in achieving optimal performance and longevity of the pump ³.

Maintenance and Troubleshooting

Routine maintenance of the Cummins 3950005 Lubricating Oil Pump is crucial for its continued efficient operation. This includes regular inspection for wear, ensuring all connections are secure, and monitoring oil pressure levels. Common issues may include oil leaks or reduced pump efficiency, which can often be addressed through timely maintenance and following recommended troubleshooting steps.

Performance and Efficiency

The Cummins 3950005 Lubricating Oil Pump plays a significant role in the overall performance and fuel efficiency of commercial truck engines. By ensuring consistent and adequate lubrication, it helps in maintaining engine health, which is directly correlated with fuel efficiency and reduced emissions. Its efficient operation is a key factor in the reliable performance of commercial trucks.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions. With a strong reputation in the industry, Cummins is known for its commitment to innovation, quality, and customer satisfaction. The company’s extensive product line includes engines, filtration systems, and other components that are critical to the operation of commercial vehicles.

Cummins Lubricating Oil Pump Part 3950005 Compatibility

The Cummins lubricating oil pump part number 3950005 is designed to ensure the smooth operation of various Cummins engines by maintaining proper oil flow. This part is compatible with a wide range of Cummins engines, including:

• ISC Series Engines

  • ISC CM2150
  • ISC CM850
  • ISC8.3 CM2250

• ISL Series Engines

  • ISL CM2150
  • ISL G CM2180
  • ISL9 CM2150 SN
  • ISL9 CM2250
  • ISL9.5 CM2880 L138

• QSC Series Engines

  • QSC8.3 CM2880 C102
  • QSC8.3 CM850 (CM2850)
  • QSC9 CM2250 / QSL9 CM2250

• QSL Series Engines

  • QSL8.9 CM2150 L141
  • QSL9 CM2250
  • QSL9 CM2350 L102
  • QSL9 CM850 (CM2850)
  • QSL9 G CM558
  • QSL9.3 CM2880 L113

• L Series Engines

  • L GAS PLUS CM556
  • L8.9
  • L8.9 L121
  • L8.9G CMOH2.0 L125B
  • L9.5 L117

• 6C Series Engines

  • 6C8.3

This compatibility ensures that the lubricating oil pump part 3950005 can be effectively used across a diverse set of engine models, providing a reliable solution for maintaining optimal engine performance.

Role of Part 3950005 Lubricating Oil Pump in Engine Systems

The lubricating oil pump, identified by part number 3950005, is an integral component in the lubrication system of an engine. Its primary function is to circulate lubricating oil throughout the engine, ensuring that all moving parts are adequately coated to minimize friction and wear.

Integration with Engine Components

1. Crankshaft and Connecting Rods: The pump delivers oil to the crankshaft and connecting rods, which are subject to high levels of stress and friction. Proper lubrication here is essential for smooth operation and longevity of these components.

2. Camshaft and Valve Train: In engines with overhead camshafts or pushrod systems, the lubricating oil pump ensures that the camshaft, lifters, and rocker arms receive a consistent supply of oil. This lubrication is vital for the precise operation of the valve train, which controls the intake and exhaust of gases.

3. Pistons and Cylinder Walls: The pump also facilitates the lubrication of pistons and cylinder walls. This reduces friction and heat, contributing to efficient combustion and preventing seizing.

4. Bearings: Main and rod bearings rely on a steady flow of oil to maintain a lubricant film that prevents metal-to-metal contact. The lubricating oil pump ensures these bearings are constantly bathed in oil.

5. Timing Chain or Belt: In engines equipped with timing chains or belts, the pump provides lubrication to these components, ensuring they operate smoothly and quietly.

6. Oil Filter: The pump pushes oil through the filter, which removes contaminants from the lubricant, ensuring that only clean oil circulates through the engine.

7. Oil Cooler: In systems with an oil cooler, the pump sends oil through this component to regulate its temperature, maintaining optimal viscosity for lubrication.

8. Oil Pan: The pump draws oil from the oil pan, where it is stored, and circulates it back after passing through the engine’s various components.

By effectively performing these functions, part 3950005 lubricating oil pump plays a significant role in maintaining the health and efficiency of the engine system.

Conclusion

The Cummins 3950005 Lubricating Oil Pump is a critical component in the lubrication system of commercial truck engines. Its robust design, high-quality materials, and efficient operation ensure that all moving parts within the engine receive adequate lubrication. This not only enhances engine performance and reliability but also contributes to better fuel economy and reduced maintenance costs. Proper installation, routine maintenance, and timely troubleshooting are essential for the continued efficient operation of this part.