3967265
Rocker Lever Housing
Cummins®

The Rocker Lever Housing, part number 3967265, manufactured by Cummins, is a critical component designed for use in commercial truck engines. Cummins, a renowned name in the engine manufacturing industry, produces a range of parts that contribute to the efficiency and reliability of truck engines. This part is significant due to its role in the valve train system, ensuring the proper operation of the engine’s valves.

Basic Concepts of Rocker Lever Housing

A Rocker Lever Housing is a part of the engine’s valve train system. Its primary function is to provide a secure mounting point for the rocker arms, which are responsible for transferring motion from the camshaft to the valves. This housing interacts with several other components, including the camshaft, pushrods, and valves, to ensure the engine operates smoothly and efficiently.

Purpose of the 3967265 Rocker Lever Housing

The 3967265 Rocker Lever Housing plays a specific role in the operation of a truck engine by housing the rocker arms. These rocker arms are pivotal in the valve train system as they convert the rotational motion of the camshaft into the linear motion needed to open and close the engine’s valves. The housing ensures that the rocker arms are correctly positioned and supported, which is vital for the precise timing and operation of the valves.

Key Features

The 3967265 Rocker Lever Housing is constructed from high-quality materials, ensuring durability and resistance to wear. Its design includes features such as precise mounting points for the rocker arms and integrated passages for lubrication, which enhance its performance. Additionally, the housing is engineered to withstand the high temperatures and pressures present in a truck engine environment.

Benefits

The 3967265 Rocker Lever Housing offers several advantages. Its robust construction contributes to improved engine efficiency by ensuring that the valve train components operate with minimal friction and wear. The housing’s design also enhances the durability and reliability of the engine, reducing the likelihood of failures and the need for frequent maintenance.

Installation Process

Installing the 3967265 Rocker Lever Housing requires careful attention to detail. The process involves removing the old housing, cleaning the mounting surface, and ensuring that all gaskets and seals are in good condition before installing the new housing. It is important to torque the mounting bolts to the manufacturer’s specifications to ensure a secure fit without overtightening, which could damage the housing or the engine block.

Common Issues and Troubleshooting

Typical problems associated with Rocker Lever Housings include leaks, wear, and misalignment. Diagnosing these issues may involve inspecting the housing for signs of damage or wear, checking the fit and alignment of the rocker arms, and ensuring that all gaskets and seals are intact. Recommended troubleshooting steps include cleaning the mounting surface, replacing worn or damaged components, and verifying that the housing is correctly installed.

Maintenance Tips

To ensure the longevity and optimal performance of the 3967265 Rocker Lever Housing, routine maintenance practices are advisable. These include regular inspections for signs of wear or damage, ensuring that all mounting bolts are torqued correctly, and keeping the housing clean and free from debris. Additionally, following the manufacturer’s recommended service intervals for lubrication and inspection can help prevent issues and extend the life of the component.

Cummins 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 reputation for quality, innovation, and reliability in the commercial truck industry. The company’s product range includes a variety of engines and components designed to meet the demanding requirements of commercial applications, ensuring efficiency, durability, and performance.

Compatibility of Rocker Lever Housing Part 3967265 with Cummins Engines

The Rocker Lever Housing part 3967265, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is integral to the engine’s valve train system, ensuring smooth operation and longevity of the engine. Below is a detailed breakdown of the engines with which this part is compatible:

ISC Series Engines

• ISC CM2150
• ISC CM850

The Rocker Lever Housing part 3967265 is compatible with both the ISC CM2150 and ISC CM850 engines. These engines are known for their robust design and are often used in heavy-duty applications.

ISL Series Engines

• ISL CM2150
• ISL9 CM2150 SN
• ISL9.5 CM2880 L138

The ISL series engines, including the ISL CM2150, ISL9 CM2150 SN, and ISL9.5 CM2880 L138, are designed for high-performance applications. The Rocker Lever Housing part 3967265 is specifically engineered to fit these engines, ensuring optimal performance and durability.

L Series Engines

• L8.9
• L8.9 CM2670 L134C
• L8.9 L121
• L9.5 L117

The L series engines, such as the L8.9, L8.9 CM2670 L134C, L8.9 L121, and L9.5 L117, are widely used in various industrial applications. The Rocker Lever Housing part 3967265 is compatible with these engines, providing a reliable solution for maintaining the engine’s valve train system.

QSC Series Engines

• QSC8.3 CM2880 C102
• QSC8.3 CM554
• QSC8.3 CM850 (CM2850)

The QSC series engines, including the QSC8.3 CM2880 C102, QSC8.3 CM554, and QSC8.3 CM850 (CM2850), are designed for both on-highway and off-highway applications. The Rocker Lever Housing part 3967265 is compatible with these engines, ensuring that the valve train system operates smoothly.

QSL Series Engines

• QSL8.9 CM2150 L141
• QSL9 CM554
• QSL9 CM850 (CM2850)
• QSL9.3 CM2880 L113

The QSL series engines, such as the QSL8.9 CM2150 L141, QSL9 CM554, QSL9 CM850 (CM2850), and QSL9.3 CM2880 L113, are known for their versatility and efficiency. The Rocker Lever Housing part 3967265 is compatible with these engines, providing a reliable solution for maintaining the engine’s valve train system.

Role of Part 3967265 Rocker Lever Housing in Engine Systems

The Rocker Lever Housing, identified by part number 3967265, is an integral component within the engine’s valve train system. It serves as the mounting point for the rocker levers, which are pivotal in transferring motion from the camshaft to the valves. This transfer is essential for the opening and closing of the engine’s intake and exhaust valves at precise moments, ensuring optimal engine performance and efficiency.

The Rocker Lever Housing is designed to provide a stable and secure environment for the rocker levers to operate within. It is engineered to withstand the high stresses and temperatures generated within the engine compartment, ensuring longevity and reliability. The housing is typically made from durable materials such as cast iron or aluminum, chosen for their strength and heat resistance properties.

In conjunction with the rocker levers, the housing plays a significant role in the mechanical advantage provided to the valve operation. The rocker levers amplify the motion of the camshaft, allowing for a more controlled and efficient opening and closing of the valves. This is particularly important in high-performance engines where valve timing and lift are critical to achieving maximum power output and fuel efficiency.

The integration of the Rocker Lever Housing with other components such as the valve springs, pushrods (in pushrod engines), and camshaft ensures a harmonious operation of the valve train. The housing must be precisely machined to accommodate these components, ensuring that there is minimal clearance for movement, which could lead to wear or failure over time.

In summary, the Rocker Lever Housing (part 3967265) is a foundational element in the engine’s valve train, facilitating the efficient transfer of motion from the camshaft to the valves through the rocker levers. Its design and material selection are critical to the durability and performance of the engine, making it a component of significant importance in the overall engine system.

Conclusion

The 3967265 Rocker Lever Housing is a vital component in the valve train system of Cummins engines, ensuring the efficient and reliable operation of the engine’s valves. Its robust construction, precise design, and compatibility with a wide range of Cummins engines make it an essential part for maintaining engine performance and longevity.