4939586
Lubricating Oil Pump
Cummins®

Introduction

The Cummins 4939586 Lubricating Oil Pump is a critical component in the engine system of commercial trucks. Its primary function is to circulate lubricating oil throughout the engine, ensuring that all moving parts are adequately coated to reduce friction and wear. This part plays a significant role in maintaining engine performance and longevity, contributing to the overall efficiency and reliability of the vehicle ¹.

Function and Operation of a Lubricating Oil Pump

A lubricating oil pump operates by drawing oil from the oil pan and circulating it through the engine. The pump uses a rotor or gear mechanism to create a suction that pulls oil into the pump cavity. Once inside, the oil is pressurized and sent through passages to various engine components, such as bearings, pistons, and camshafts. This continuous circulation of oil helps to cool the engine, remove contaminants, and reduce friction between moving parts, which is essential for smooth operation and longevity ².

Role of the 4939586 Lubricating Oil Pump in Truck Operation

The 4939586 Lubricating Oil Pump is specifically designed to meet the demanding requirements of commercial truck engines. It ensures that oil is consistently delivered to critical engine components under various operating conditions. By maintaining proper lubrication, this pump contributes to enhanced engine performance, reduced wear and tear, and extended engine life. Its reliable operation is fundamental to the efficient and durable performance of commercial trucks ³.

Key Features of the 4939586 Lubricating Oil Pump

The 4939586 Lubricating Oil Pump is constructed with high-quality materials to ensure durability and performance. It features a robust design that can withstand the high pressures and temperatures encountered in commercial truck engines. The pump is engineered with precision to provide consistent oil flow and pressure, ensuring optimal lubrication. Additionally, its design includes features that facilitate easy installation and maintenance, contributing to its overall effectiveness and reliability.

Benefits of Using the 4939586 Lubricating Oil Pump

Utilizing the 4939586 Lubricating Oil Pump offers several advantages. It enhances engine efficiency by ensuring that all moving parts are properly lubricated, which reduces friction and heat. This can lead to improved fuel economy and overall engine performance. Additionally, the pump’s reliable operation helps to minimize maintenance costs by reducing the frequency of engine repairs and replacements. Its durable construction and precise engineering also contribute to enhanced reliability, making it a valuable component for commercial truck operators.

Common Issues and Troubleshooting

Common problems associated with lubricating oil pumps include oil leaks, insufficient oil pressure, and pump failure. These issues can often be traced to worn seals, clogged oil passages, or mechanical failures within the pump. Troubleshooting steps may involve inspecting the pump for visible damage, checking oil levels and pressure, and ensuring that oil passages are clear of debris. In some cases, replacing worn components or the entire pump may be necessary to restore proper function.

Maintenance Tips

To ensure optimal performance and longevity of the 4939586 Lubricating Oil Pump, regular maintenance is recommended. This includes periodic inspection for signs of wear or damage, cleaning oil passages to prevent clogs, and ensuring that the pump is properly lubricated. Additionally, following the manufacturer’s guidelines for oil changes and pump replacement can help to maintain efficient operation. Regular maintenance not only enhances the pump’s performance but also contributes to the overall reliability of the engine.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing high-quality, reliable engines and components. The company’s extensive product range includes a variety of engines, powertrains, and aftermarket parts, all designed to meet the rigorous demands of commercial applications. Cummins’ commitment to innovation, quality, and customer satisfaction has made it a trusted name in the industry.

Cummins Lubricating Oil Pump Part 4939586 Compatibility

The Cummins part number 4939586, which is a lubricating oil pump, is designed to fit a range of Cummins engines. This part is crucial for maintaining the proper lubrication within the engine, ensuring smooth operation and longevity.

B4.5 RGT Engines

The lubricating oil pump part 4939586 is compatible with the B4.5 RGT engines. This engine is known for its reliability and efficiency, making it a popular choice in various applications.

ISB/ISD4.5 CM2150 B119 Engines

For the ISB/ISD4.5 CM2150 B119 engines, the part 4939586 is also suitable. These engines are part of the Cummins B Series, known for their robust performance and durability.

ISBE CM800 and ISBE4 CM850 Engines

The lubricating oil pump part 4939586 fits the ISBE CM800 and ISBE4 CM850 engines. These engines are part of the Cummins B Series and are designed for heavy-duty applications, providing excellent power and efficiency.

ISD4.5 CM2220 D108 Engines

The part 4939586 is also compatible with the ISD4.5 CM2220 D108 engines. These engines are known for their high torque output and reliability, making them suitable for demanding industrial applications.

QSB4.5 CM2250 EC and QSB4.5 CM850 (CM2850) Engines

Lastly, the lubricating oil pump part 4939586 fits the QSB4.5 CM2250 EC and QSB4.5 CM850 (CM2850) engines. These engines are part of the Cummins QSB Series, designed for versatility and efficiency in a range of applications.

Role of Part 4939586 Lubricating Oil Pump in Engine Systems

The lubricating oil pump, specifically part 4939586, is integral to maintaining the health and efficiency of engine systems. Its primary function is to circulate lubricating oil throughout the engine, ensuring that all moving parts are adequately coated to reduce friction and wear.

Interaction with Engine Components

1. Crankshaft and Connecting Rods: The pump delivers oil to the crankshaft and connecting rods, which are subject to high rotational speeds and loads. Consistent lubrication here prevents metal-to-metal contact, which could lead to premature wear or failure.

2. Camshaft and Valve Train: In overhead cam engines, the pump ensures that the camshaft and valve train components receive a steady supply of oil. This lubrication is essential for the smooth operation of the valves, which open and close thousands of times per minute.

3. Pistons and Cylinder Walls: The pump also facilitates the lubrication of pistons and cylinder walls. Proper lubrication in this area is vital for maintaining the seal between the piston rings and the cylinder wall, which is necessary for efficient combustion and to prevent oil consumption.

4. Bearings: All engine bearings, including main and rod bearings, rely on a consistent flow of oil to function correctly. The pump ensures that these bearings remain lubricated, which is essential for their longevity and the overall stability of the engine.

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

6. Oil Filter: The pump works in conjunction with the oil filter to maintain oil cleanliness. It pushes oil through the filter, where contaminants are trapped, ensuring that only clean oil circulates through the engine.

7. Oil Cooler: In engines equipped with an oil cooler, the pump sends oil through this component to regulate its temperature. This is particularly important in high-performance or high-stress applications where oil temperatures can rise significantly.

8. Turbocharger: For turbocharged engines, the pump ensures that the turbocharger’s bearings and other moving parts are well-lubricated. This is essential for the turbocharger’s efficiency and durability.

Conclusion

In summary, the 4939586 lubricating oil pump plays a significant role in the overall performance and longevity of engine systems by ensuring that all critical moving parts receive consistent and adequate lubrication. Its robust design, precise engineering, and compatibility with a range of Cummins engines make it a valuable component for commercial truck operators.