3967119
Spring Washer
Cummins®

Introduction

The Cummins 3967119 Spring Washer is a specialized component designed for use in commercial trucks. Its primary function is to maintain bolt tension and prevent loosening, which is vital for the integrity and safety of truck assemblies. This washer is commonly applied in various fastening applications within the truck’s mechanical systems.

Basic Concepts of Spring Washers

A spring washer, also known as a lock washer, is a type of washer designed with a split or helical shape. This design allows it to exert a spring-like action when compressed under a bolt or nut. The primary function of a spring washer is to provide additional tension to the fastening system, which helps to keep bolts and nuts securely in place. Spring washers are widely used in mechanical assemblies where vibrations or dynamic loads could cause standard washers to fail ¹.

Purpose of the Cummins 3967119 Spring Washer

The Cummins 3967119 Spring Washer plays a significant role in the operation of commercial trucks by ensuring that bolts remain tightened under various conditions. It functions by providing a constant tension force that counters the loosening effects of vibrations and thermal expansions that occur during truck operation. This helps maintain the structural integrity of the truck’s components and ensures that critical connections remain secure ².

Key Features

The Cummins 3967119 Spring Washer is engineered with specific design and material characteristics to enhance its performance and durability in heavy-duty applications. It is typically made from high-tensile steel, which provides the necessary strength and resilience. The washer’s split or helical design allows it to deform slightly when tightened, creating a spring-like effect that maintains tension on the bolt. Additionally, the material used is often treated to resist corrosion, ensuring longevity in harsh operating environments ³.

Benefits of Using Spring Washers

Incorporating spring washers like the Cummins 3967119 in truck assemblies offers several advantages. These washers improve load distribution across the fastening area, which reduces the risk of damage to connected components. They also enhance vibration resistance, which is crucial in the dynamic environment of a commercial truck. Furthermore, the use of spring washers can prolong the life of both the washer itself and the associated bolts and nuts by preventing loosening and ensuring consistent tension.

Installation Considerations

Proper installation of the Cummins 3967119 Spring Washer is crucial for ensuring optimal performance and longevity. It should be placed under the nut or bolt head, ensuring that the split or helical portion of the washer is oriented correctly to exert the spring action. It is important to use the correct torque specifications for the bolt to avoid over-tightening, which can damage the washer, or under-tightening, which can reduce its effectiveness. Additionally, ensuring that the surfaces are clean and free of debris will help the washer function as intended.

Troubleshooting and Maintenance

Common issues associated with spring washers include deformation due to over-tightening, corrosion in harsh environments, and failure to maintain tension due to wear. To identify problems, regularly inspect the washers for signs of deformation or corrosion. Maintenance practices such as replacing worn or damaged washers, ensuring proper torque during reassembly, and protecting the washers from corrosive elements can extend their life and maintain the integrity of the fastening system.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Founded in 1919, Cummins has a long-standing reputation for producing reliable and high-performance components for the commercial truck industry. Their product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of heavy-duty applications. Cummins is known for its commitment to quality, innovation, and customer satisfaction, making it a trusted name in the industry.

Cummins Engine Part 3967119: Spring Washer Compatibility

The Spring Washer part number 3967119, manufactured by Cummins, is a versatile component designed to fit a variety of Cummins engines. This part is integral in ensuring proper assembly and function across different engine models. Here is a detailed overview of its compatibility with various Cummins engines:

ISB/ISD Series

• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB3.9 CM2220 B107
• ISB5.9 CM2880 B127

The Spring Washer 3967119 is compatible with the ISB/ISD series engines, which include the ISB/ISD4.5, ISB/ISD6.7, ISB3.9, and ISB5.9 models. These engines are known for their reliability and performance in various applications, from heavy-duty trucks to industrial machinery.

ISBE Series

• ISBE CM2150
• ISBE4 CM850

The ISBE series engines, including the ISBE CM2150 and ISBE4 CM850, also utilize the Spring Washer 3967119. These engines are designed for high-performance applications, providing robust power and efficiency.

ISL Series

• ISL9 CM2150 SN
• ISL9.5 CM2880 L138

The ISL series engines, such as the ISL9 CM2150 SN and ISL9.5 CM2880 L138, are another group where the Spring Washer 3967119 is applicable. These engines are engineered for demanding tasks, offering durability and strength.

L Series

• L8.9
• L8.9 CM2670 L134C
• L8.9G CMOH2.0 L125B
• L9 CM2670 L128B

The L series engines, including the L8.9, L8.9 CM2670 L134C, L8.9G CMOH2.0 L125B, and L9 CM2670 L128B, are also compatible with the Spring Washer 3967119. These engines are widely used in various industries for their dependable performance.

QSB/QSL Series

• QSB3.9 CM2880 B138
• QSB5.9 CM2880 B139
• QSC8.3 CM2880 C102
• QSL8.9 CM2150 L141
• QSL9 CM850 (CM2850)

The QSB/QSL series engines, such as the QSB3.9, QSB5.9, QSC8.3, QSL8.9, and QSL9, are another set of engines that use the Spring Washer 3967119. These engines are known for their versatility and are used in a range of applications, from agricultural to construction equipment.

The Spring Washer 3967119 is a critical component in maintaining the integrity and performance of these engines. Its compatibility across various Cummins engine models underscores its importance in ensuring smooth operation and longevity of the engines.

Role of Part 3967119 Spring Washer in Engine Systems

The 3967119 Spring Washer is an essential component in various engine systems, providing stability and ensuring the proper functioning of several key components.

Clutch System

In the clutch system, the Spring Washer is utilized to maintain consistent pressure between the clutch plate and the flywheel. This ensures smooth engagement and disengagement, contributing to efficient power transfer from the engine to the transmission.

Rear Connection Points

At the rear connections of the engine, particularly at the water inlet and outlet, the Spring Washer plays a significant role. It helps in maintaining a secure fit between the hoses and the engine block, preventing leaks and ensuring a steady flow of coolant. This is vital for maintaining optimal engine temperature and preventing overheating.

Heat Exchanger

Within the heat exchanger, the Spring Washer is employed to secure the connections between the tubes and headers. This ensures that the transfer of heat between the coolant and the surrounding air is efficient, contributing to the overall cooling system’s effectiveness.

Throttle Lever and Mounting

The Spring Washer is also found in the throttle lever and its mounting points. Here, it helps in maintaining the precise alignment and tension required for accurate throttle control, which is essential for regulating the engine’s RPM and power output.

Air Cleaner and Rail Base

In the air cleaner assembly and the rail base, the Spring Washer ensures that all components are tightly secured. This prevents air leaks and ensures that the air intake system operates efficiently, providing the engine with the clean air it needs for optimal combustion.

Oil Pressure Sensor and Support

The Spring Washer is utilized in the oil pressure sensor and various engine support points. It ensures that these components are firmly attached, providing accurate readings and stable support, respectively. This is important for monitoring engine health and maintaining structural integrity.

Front and Rear Engine Supports

In both front and rear engine supports, the Spring Washer helps in securing the engine to the chassis. This not only ensures that the engine remains in the correct position but also helps in absorbing vibrations, contributing to a smoother and more reliable operation.

Conclusion

The Cummins 3967119 Spring Washer is a vital component in the maintenance and operation of commercial trucks and various Cummins engines. Its design and functionality ensure that bolts and connections remain secure under dynamic conditions, contributing to the overall reliability and performance of the vehicle. Proper installation, regular maintenance, and understanding its role in different engine systems are essential for maximizing the benefits of this part.