4955352
Main Bearing Set
Cummins®

Introduction

The Cummins 4955352 Main Bearing Set is a component designed for use in commercial trucks. It plays a role in the engine’s operation by supporting the crankshaft and enabling smooth rotational movement. This bearing set is integral to maintaining the engine’s efficiency and reliability, contributing to the overall performance of the truck.

Basic Concepts of Main Bearing Sets

A main bearing set consists of several bearings that are positioned along the crankshaft within an engine. These bearings are responsible for reducing friction between the crankshaft and the engine block, which is vital for the engine’s operation ¹. They allow the crankshaft to rotate with minimal resistance, which is important for the engine’s smooth functioning. The main bearings support the crankshaft’s weight and the forces generated during engine operation, ensuring that the crankshaft remains aligned and operates efficiently.

Role of the 4955352 Main Bearing Set in Truck Operation

The Cummins 4955352 Main Bearing Set is specifically engineered to enhance the operation of a truck’s engine. It is positioned within the engine assembly, where it interacts directly with the crankshaft. The bearing set’s design allows for precise alignment and support of the crankshaft, which is necessary for the engine’s consistent performance. By facilitating smooth rotation, the bearing set contributes to the engine’s efficiency and helps in maintaining optimal truck operation.

Key Features

The Cummins 4955352 Main Bearing Set is characterized by its high-quality material composition and design enhancements. It is constructed from durable materials that can withstand the high stresses and temperatures within an engine. The set may include features such as precision machining for accurate fitment, enhanced lubrication grooves for better oil distribution, and a robust design to ensure longevity and performance under demanding conditions.

Benefits

Utilizing the Cummins 4955352 Main Bearing Set can lead to improved engine performance, increased durability, and enhanced reliability. These advantages are reflected in the truck’s overall efficiency and longevity. The bearing set’s ability to support the crankshaft effectively contributes to reduced wear and tear on engine components, potentially leading to longer service intervals and lower maintenance costs.

Troubleshooting and Maintenance

To ensure the optimal performance and longevity of the Cummins 4955352 Main Bearing Set, it is important to be aware of common issues that may arise. Regular inspection for signs of wear, such as unusual noises or vibrations, can help in early detection of potential problems ². Maintenance practices should include proper installation procedures to avoid damage and ensure the bearing set functions as intended. Additionally, adhering to recommended service intervals for oil changes and inspections can help maintain the bearing set’s condition.

About Cummins

Cummins Inc. is a well-established company with a strong reputation in the industry for producing high-quality automotive components. With a history rooted in diesel engine technology, Cummins has become a trusted supplier in the commercial truck market. The company’s commitment to quality and innovation is evident in its product line, which includes a range of components designed to enhance the performance and reliability of commercial vehicles.

Role of Part 4955352 Main Bearing Set in Engine Systems

The Main Bearing Set is integral to the functionality and efficiency of engine systems, particularly when integrated with an overhaul kit. This bearing set is designed to facilitate smooth operation between the crankshaft and the engine block.

When an overhaul kit is utilized, the main bearing set works in conjunction with other components to ensure the engine’s longevity and performance. The bearings reduce friction as the crankshaft rotates, which is essential for maintaining the engine’s operational integrity ³.

In the context of an overhaul kit, the main bearing set is often replaced to restore the engine to its optimal condition. This ensures that the crankshaft can spin freely without excessive wear, which is vital for the engine’s durability.

Additionally, the main bearing set interacts with the connecting rods, pistons, and the oil pump. Proper lubrication is necessary for the bearings to function correctly, and this is where the oil pump plays a significant role. It ensures a consistent supply of oil to the bearings, reducing the risk of metal-to-metal contact and subsequent damage.

Kit Components of Cummins Main Bearing Set (4955352)

Main Bearing (3978818)

The first main bearing in the set, identified by the part number 3978818, is crucial for supporting the crankshaft’s rotational movement. It is strategically positioned to handle the high loads and rotational speeds, ensuring smooth operation and longevity of the engine’s crankshaft.

Main Bearing (3978820)

The second main bearing, part number 3978820, complements the first by providing additional support to the crankshaft. This bearing is essential for maintaining the precise alignment and balance of the crankshaft, which is vital for the engine’s performance and durability.

Thrust Bearing (3978822)

The thrust bearing, designated by the part number 3978822, plays a specialized role in the main bearing set. It is responsible for managing the axial forces that the crankshaft experiences during operation. By controlling these forces, the thrust bearing helps to prevent excessive wear and ensures the crankshaft remains stable within the engine block.

Conclusion

The Cummins 4955352 Main Bearing Set is a critical component in the operation and maintenance of commercial truck engines. Its design and features contribute to the engine’s efficiency, reliability, and longevity. Regular maintenance and proper installation are key to ensuring the optimal performance of this Cummins part.