4936076
Valve Spring
Cummins®

Introduction

The Valve Spring 4936076 by Cummins is a component designed to ensure the proper operation of valves within commercial truck engines. Its role is significant as it contributes to the overall efficiency and performance of the engine. This valve spring is engineered to meet the demanding requirements of heavy-duty applications, providing reliable valve actuation under various operating conditions ¹.

Basic Concepts of Valve Springs

Valve springs are mechanical components found in internal combustion engines. Their primary function is to ensure that the engine’s valves return to their closed position after being opened by the camshaft. This action is crucial for maintaining the proper timing and sequence of the engine’s intake and exhaust cycles. Valve springs operate by storing mechanical energy when compressed and then releasing it to return the valve to its original position ².

Role of Valve Spring 4936076 in Truck Operation

The Valve Spring 4936076 plays a specific role in the operation of a truck engine by ensuring that the valves open and close at the correct times. This precise timing is vital for the engine’s performance and efficiency. By maintaining consistent valve operation, the spring contributes to the engine’s ability to deliver power and achieve optimal fuel efficiency. Its design and material composition are tailored to withstand the high stresses and temperatures encountered in commercial truck engines ³.

Key Features of Valve Spring 4936076

The Valve Spring 4936076 is characterized by several key features that enhance its performance. It is constructed from high-quality materials that offer durability and resistance to wear. The design of the spring includes specific coil dimensions and tension settings that are optimized for the demands of heavy-duty truck engines. Additionally, the spring may incorporate unique attributes such as anti-rotation features to prevent shifting during operation, ensuring consistent valve performance.

Benefits of Using Valve Spring 4936076

Utilizing the Valve Spring 4936076 in truck engines can lead to several benefits. These include improved engine reliability due to the spring’s ability to maintain consistent valve operation under various conditions. Enhanced performance is another advantage, as the precise timing facilitated by the spring contributes to efficient combustion and power delivery. Longevity is also a notable benefit, as the durable construction of the spring helps to extend the service life of the engine’s valve train components.

Troubleshooting and Maintenance Tips

To ensure the optimal performance of valve springs, including the Valve Spring 4936076, regular maintenance is recommended. This involves inspecting the springs for signs of wear, such as deformation or loss of tension, which can indicate the need for replacement. Troubleshooting common issues may include checking for proper valve clearance and ensuring that the springs are correctly installed and functioning as intended. Adhering to manufacturer-recommended maintenance schedules can help prevent unexpected failures and maintain engine efficiency.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and related technologies. With a history spanning over a century, Cummins has established a reputation for quality and innovation in the commercial truck industry. The company’s commitment to excellence is reflected in its product offerings, which are designed to meet the rigorous demands of heavy-duty applications. Cummins continues to lead the way in developing advanced power solutions that enhance the performance and reliability of commercial vehicles.

Compatibility of Valve Spring Part 4936076 with Cummins Engines

The Cummins Valve Spring part number 4936076 is designed to fit a variety of Cummins engines, ensuring optimal performance and reliability. This part is integral to the engine’s valve train system, providing the necessary spring force to close the engine’s valves efficiently.

ISC Series Engines

• ISC CM2150
• ISC CM554
• ISC CM850
• ISC8.3 CM2250
• ISL CM2150
• ISL CM554
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

ISG Series Engines

• ISG11 CM2880 G108
• ISG12 CM2880 G107

L Series Engines

• L8.9
• L8.9 L121
• L9.5 L117

QSC and QSL Series Engines

• QSC8.3 CM2880 C102
• QSC8.3 CM554
• QSC8.3 CM850(CM2850)
• QSC9 CM2250/QSL9 CM2250
• QSG12 CM2880 G112
• QSG12/X12 CM2350 G110
• QSL8.9 CM2150 L141
• QSL9 CM2250
• QSL9 CM2350 L102
• QSL9 CM554

Role of Part 4936076 Valve Spring in Engine Systems

The part 4936076 valve spring is a critical component in the orchestration of an engine’s operation, ensuring the precise and reliable movement of the valve train. This spring is responsible for maintaining the proper seating of the valves against the cylinder head, which is vital for the sealing of the combustion chamber during the various stages of the engine cycle.

When the camshaft rotates, it actuates the valve through the use of a cam lobe, which pushes against the valve stem. The valve spring counteracts this force, ensuring that the valve returns to its closed position after the cam lobe has passed. This action is fundamental for the intake and exhaust processes, allowing the engine to draw in air and fuel and expel exhaust gases efficiently.

The valve spring also plays a significant role in managing the dynamics of the valve train. As engine speed increases, the valve spring must maintain consistent valve seating to prevent valve float, a condition where the valve does not follow the cam profile accurately, which can lead to decreased performance and potential engine damage.

Moreover, the valve spring’s interaction with the cylinder head is not isolated. It is part of a complex system that includes the connecting rod and piston assembly. The precise timing of valve operation is synchronized with the movement of the piston within the cylinder. This ensures that the intake valve opens just as the piston reaches the top of its stroke, allowing the fresh air-fuel mixture to enter the combustion chamber. Conversely, the exhaust valve opens as the piston approaches the bottom of its stroke, facilitating the expulsion of spent gases.

The performance of the valve spring is also influenced by the fuel manifold and injector system. The timing and duration of valve opening must be finely tuned to coincide with the injection of fuel, which is controlled by the injectors. This coordination is essential for optimal combustion and engine efficiency.

Conclusion

In summary, the part 4936076 valve spring is a key player in the engine’s valve train, working in concert with the camshaft, cylinder head, fuel manifold, and injectors to ensure the engine operates smoothly and efficiently. Its role in maintaining valve timing and seating is indispensable for the overall performance and longevity of the engine.