4946031
Crankshaft Thrust Bearing
Cummins®

The Cummins 4946031 Crankshaft Thrust Bearing is a component designed to facilitate the smooth operation of commercial truck engines. Its role is to manage axial loads and maintain the crankshaft’s position, contributing to the engine’s overall performance and longevity.

Basic Concepts of Crankshaft Thrust Bearings

A crankshaft thrust bearing is a type of bearing that operates within an engine to handle axial loads generated during engine operation. It ensures that the crankshaft remains in its proper position, preventing undue stress on other engine components and maintaining efficient engine performance. The bearing operates by providing a low-friction surface that allows the crankshaft to move axially while minimizing wear and tear ¹.

Purpose of the 4946031 Crankshaft Thrust Bearing

This Cummins part plays a role in the operation of a truck engine by managing axial loads and maintaining the crankshaft’s position. This bearing is specifically designed to withstand the high pressures and temperatures within a diesel engine, ensuring that the crankshaft operates smoothly and efficiently.

Key Features

The 4946031 features a design that includes high-quality materials and precise engineering to enhance its performance and durability. It is constructed from materials that can withstand the harsh conditions within a diesel engine, such as high temperatures and pressures. Additionally, its design allows for efficient heat dissipation and reduced friction, contributing to its longevity and reliability.

Benefits

Using the 4946031 offers several benefits, including improved engine efficiency, reduced wear and tear on engine components, and enhanced reliability. By managing axial loads effectively, this bearing helps to maintain the engine’s performance over time, leading to lower maintenance costs and increased uptime for commercial trucks.

Installation Process

Proper installation of the 4946031 involves several steps to ensure optimal performance. It is important to follow manufacturer guidelines for installation, including proper alignment and torque specifications. Careful attention to these details during installation can help to prevent issues such as misalignment or excessive wear, ensuring the bearing operates efficiently.

Troubleshooting Common Issues

Common problems associated with crankshaft thrust bearings include excessive wear or failure. These issues can often be diagnosed through visual inspection or by monitoring engine performance. Troubleshooting steps may involve checking for proper installation, ensuring adequate lubrication, and addressing any underlying issues that could be contributing to bearing wear.

Maintenance Tips

To prolong the life of the 4946031, regular inspection routines, proper lubrication, and adherence to recommended service intervals are important. Keeping the bearing clean and free from contaminants, as well as ensuring it is properly lubricated, can help to maintain its performance and extend its service life.

Role in Engine Performance

The 4946031 contributes to overall engine performance by ensuring the crankshaft operates smoothly and efficiently. Its role in managing axial loads helps to maintain power output, fuel efficiency, and operational smoothness, making it a vital component in the engine system.

Cummins: A Brief Overview

Cummins Inc. is a well-established manufacturer in the commercial truck industry, known for its high-quality engines and components. With a history of innovation and a diverse product range, Cummins has built a reputation for reliability and performance. The 4946031 Crankshaft Thrust Bearing is a testament to Cummins’ commitment to quality and durability in the components it produces.

Crankshaft Thrust Bearing (Part 4946031) Compatibility with Cummins Engines

The Crankshaft Thrust Bearing, part number 4946031, manufactured by Cummins, is a critical component designed to ensure smooth and efficient operation of various engine models. This bearing is integral to maintaining the alignment and stability of the crankshaft, reducing friction, and preventing excessive wear. Below is a detailed overview of its compatibility with specific Cummins engine models:

F2.8 CM2620 F135B, ISF2.8 CM2220 F117, ISF2.8 CM2220 F129

The Crankshaft Thrust Bearing part 4946031 is compatible with the following engines:

• F2.8 CM2620 F135B
• ISF2.8 CM2220 F117
• ISF2.8 CM2220 F129

These engines, while differing in specific configurations and applications, share a commonality in their requirement for a reliable thrust bearing to maintain crankshaft stability and performance.

QSF2.8 CM2880 F104, QSF2.8 CM2880 F105, QSF2.8 CM2880 F108, QSF2.8 CM2880 F114

The following engines also utilize the Crankshaft Thrust Bearing part 4946031:

• QSF2.8 CM2880 F104
• QSF2.8 CM2880 F105
• QSF2.8 CM2880 F108
• QSF2.8 CM2880 F114

These engines, part of the QSF2.8 CM2880 series, are designed for heavy-duty applications and benefit from the precision and durability of the 4946031 thrust bearing. This ensures optimal performance and longevity under demanding conditions.

R2.8 CM2220 R101B

Lastly, the Crankshaft Thrust Bearing part 4946031 is also compatible with the:

• R2.8 CM2220 R101B

This engine model, like the others mentioned, relies on the thrust bearing to maintain crankshaft alignment and reduce operational wear, ensuring reliable performance across various applications.

By ensuring the correct installation of the Crankshaft Thrust Bearing part 4946031, these engines can achieve the desired operational efficiency and longevity, underscoring the importance of this component in maintaining overall engine health.

Role of Part 4946031 Crankshaft Thrust Bearing in Engine Systems

The part 4946031 Crankshaft Thrust Bearing is an essential component in the efficient operation of engine systems, working in conjunction with several other key components to ensure smooth and reliable performance.

Interaction with the Engine Block

The engine block serves as the structural foundation of the engine, housing the cylinders, main bearings, and crankshaft. The crankshaft thrust bearing is positioned at the rear of the crankshaft within the engine block. Its primary function is to manage axial movement, preventing the crankshaft from shifting along its axis. This interaction ensures that the crankshaft remains properly aligned within the engine block, which is vital for the precision of the engine’s operation.

Coordination with Cylinders

Cylinders are integral to the engine’s power generation process, where the combustion of fuel occurs. The crankshaft, connected to the pistons via connecting rods, translates the linear motion of the pistons into rotational motion. The crankshaft thrust bearing plays a supportive role here by maintaining the crankshaft’s position, allowing the cylinders to operate efficiently without undue stress on the crankshaft or surrounding components.

Integration with Main Bearings

The standard main bearing set is responsible for supporting the crankshaft journal, allowing it to rotate smoothly within the engine block. The crankshaft thrust bearing complements the main bearings by controlling the crankshaft’s end play. This coordination between the thrust bearing and main bearings ensures that the crankshaft operates within specified tolerances, reducing wear and enhancing the longevity of the engine components.

Conclusion

In summary, the part 4946031 Crankshaft Thrust Bearing works in harmony with the engine block, cylinders, and main bearing set to maintain the integrity and efficiency of the engine system. Its role in managing axial movement and ensuring proper alignment is fundamental to the engine’s overall performance and durability.

References