3426040
Camshaft
Cummins®

The Cummins 3426040 Camshaft is a vital component in heavy-duty truck engines, contributing significantly to engine performance. This camshaft is designed to enhance the operational efficiency of truck engines by optimizing valve timing and improving overall engine dynamics.

Basic Concepts of a Camshaft

A camshaft is a shaft with a series of cams or lobes that rotate to actuate the intake and exhaust valves of an internal combustion engine. Its primary functions include controlling the timing and duration of valve opening and closing, which directly influences the engine’s air intake and exhaust processes. The camshaft interacts with other engine components such as the valve train, which includes lifters, pushrods, and rocker arms, to ensure precise valve operation ¹.

Purpose of the 3426040 Camshaft

This Cummins part plays a role in the operation of a truck engine by determining the timing and lift of the valves. It is engineered to provide optimal valve timing, which enhances engine efficiency and performance. By precisely controlling when the valves open and close, the camshaft ensures that the engine operates smoothly and efficiently, contributing to better fuel economy and power output ².

Key Features

The 3426040 is constructed with high-quality materials to ensure durability and performance. Its design includes specific lobe profiles that are tailored to the requirements of heavy-duty truck engines. These profiles are engineered to provide the necessary valve lift and duration for optimal engine performance. Additionally, the camshaft may feature unique characteristics such as enhanced wear resistance and precise manufacturing tolerances to ensure consistent performance over time.

Benefits

This part offers several advantages, including improved engine performance, enhanced fuel efficiency, and increased durability. By optimizing valve timing and lift, it contributes to better airflow within the engine, leading to increased power output and torque. Additionally, its robust construction ensures long-lasting performance, reducing the need for frequent replacements and maintenance.

Installation and Compatibility

Proper installation of the 3426040 requires careful preparation and the use of appropriate tools. It is important to follow manufacturer guidelines to ensure that the camshaft is installed correctly and functions as intended. This camshaft is designed to be compatible with specific engine models and configurations, ensuring seamless integration into the engine system.

Performance Impact

The installation of the 3426040 can lead to noticeable improvements in engine performance. Users may experience increased power output and torque, as well as enhanced overall drivability. The precise valve timing and lift provided by this camshaft contribute to more efficient combustion, resulting in better engine performance and fuel economy.

Maintenance and Troubleshooting

Regular maintenance is key to ensuring the longevity and optimal performance of the 3426040. This includes routine inspections for wear and damage, as well as proper lubrication to reduce friction and wear. Common issues may include camshaft wear or lobe damage, which can be identified through regular maintenance checks. Troubleshooting tips may involve checking for proper valve clearances and ensuring that the camshaft is installed correctly.

Cummins Corporation

Cummins Inc. is a leading manufacturer in the heavy-duty truck industry, known for its wide range of high-quality engine components. With a rich history of innovation and excellence, Cummins has established a strong reputation for producing reliable and efficient engine parts. The company’s commitment to quality and performance is evident in its product range, which includes a variety of components designed to enhance the operation of heavy-duty trucks.

Cummins Camshaft Part 3426040 Compatibility

The Cummins camshaft part number 3426040 is designed to fit seamlessly with various engine models, ensuring optimal performance and reliability. This camshaft is engineered to work with specific engine configurations, providing precise control over the engine’s valve timing and airflow.

Engine Compatibility

• QSV91G: The camshaft part 3426040 is compatible with the QSV91G engine, ensuring that it meets the stringent performance and durability standards required for this engine model.

When installing the camshaft, it is crucial to follow the manufacturer’s guidelines to ensure proper alignment and function. This part is critical in maintaining the engine’s efficiency and longevity, making it a vital component for engine maintenance and repair.

Role of Part 3426040 Camshaft in Engine Systems

The camshaft, identified by part number 3426040, is an integral component within the engine assembly (assy) of the V18 engine. Its primary function is to control the timing of the valve operation, which is essential for the engine’s performance and efficiency.

Interaction with Key Components

• Camshaft (CAM): The camshaft itself is a shaft with a series of cams or lobes. Each lobe is designed to open and close the intake and exhaust valves at precise moments in the engine’s cycle. The camshaft’s rotation is synchronized with the crankshaft, ensuring that the valves operate in harmony with the pistons’ movements.

• Engine Assembly (assy V18): Within the V18 engine assembly, the camshaft is positioned to interact directly with the valve train. This assembly typically includes the cylinder heads, valve springs, and rocker arms or direct-acting followers, depending on the engine’s design. The camshaft’s lobes push against these components, causing the valves to open and close at the correct times.

• Block (B): The engine block houses the camshaft in a dedicated camshaft journal. This journal provides the necessary support and alignment for the camshaft as it rotates. The precision of this fit is vital for maintaining the camshaft’s operational integrity and ensuring smooth engine operation.

• Counterclockwise (CCW) Rotation: In engines where the camshaft rotates counterclockwise, part 3426040 is designed to accommodate this specific rotation. This design ensures that the valve timing remains consistent with the engine’s overall operation, whether it is a single overhead cam (SOHC) or dual overhead cam (DOHC) system.

The camshaft’s role in these components underscores its importance in the engine’s functionality. By precisely controlling valve timing, the camshaft directly influences the engine’s power output, fuel efficiency, and emissions.

Conclusion

The Cummins 3426040 Camshaft is a critical component in heavy-duty truck engines, designed to optimize valve timing and enhance engine performance. Its high-quality construction, precise engineering, and compatibility with specific engine models make it a reliable choice for improving engine efficiency and durability. Regular maintenance and proper installation are essential to ensure the camshaft’s longevity and optimal performance.