4970956
Spring Washer
Cummins®

Introduction

The Cummins 4970956 Spring Washer is a specialized component designed for use in heavy-duty truck applications. Its primary role is to enhance the reliability and durability of bolted connections by maintaining consistent tension and preventing loosening under dynamic conditions.

Basic Concepts of Spring Washers

A spring washer, also known as a lock washer, is a type of washer designed to prevent loosening of fastened joints. It functions by exerting a spring force that keeps the bolt or nut tightened, even under vibrations and fluctuating loads. Spring washers are commonly used in various mechanical systems where secure fastening is essential ¹.

Purpose of the Cummins 4970956 Spring Washer

The Cummins 4970956 Spring Washer plays a specific role in the operation of heavy-duty trucks by maintaining bolt tension and preventing loosening. This is particularly important in applications where vibrations and dynamic loads are common, such as in the engine, transmission, and chassis components. By ensuring that bolts remain securely fastened, the spring washer contributes to the overall stability and safety of the vehicle ².

Key Features

The Cummins 4970956 Spring Washer is characterized by several key features that enhance its performance. It is typically made from high-strength materials such as spring steel, which provides the necessary resilience and durability. The design specifications include a split-ring shape with a gap that creates the spring action. Additionally, the washer may feature serrated edges to bite into the mating surfaces, further securing the fastener.

Benefits of Using Spring Washers

Incorporating spring washers into truck assemblies offers several advantages. These include improved reliability by ensuring that bolted connections remain tight under various operating conditions. Enhanced durability is another benefit, as the consistent tension provided by the spring washer reduces the risk of fatigue and failure. Additionally, the use of spring washers can lead to reduced maintenance requirements, as they help prevent the need for frequent re-tightening of bolts ³.

Installation Guidelines

Proper installation of the Cummins 4970956 Spring Washer is crucial for optimal performance. The following steps should be followed:

1. Ensure the mating surfaces are clean and free of debris.
2. Place the spring washer under the bolt head or nut.
3. Tighten the bolt or nut to the specified torque, ensuring that the spring washer is properly seated.
4. Verify that the gap in the spring washer is oriented correctly to provide the intended spring action.

Troubleshooting and Maintenance

Common issues associated with spring washers include deformation or failure due to excessive torque or corrosion. To diagnose problems, inspect the washer for signs of wear, deformation, or damage. Regular maintenance practices, such as periodic inspection and replacement of worn washers, can help prolong the lifespan of the component and associated fasteners.

Cummins Corporation

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history dating back to 1919, Cummins has established a strong reputation in the heavy-duty truck industry for producing high-quality, reliable components. The company’s product offerings include a wide range of engine and powertrain solutions designed to meet the demanding requirements of commercial and industrial applications.

Cummins Engine Part 4970956: Spring Washer Application

The Spring Washer part number 4970956, manufactured by Cummins, is a critical component in the assembly of several Cummins engine models. This part is designed to provide a secure and reliable connection between engine components, ensuring optimal performance and longevity.

Application in Cummins Engines

QSK19 CM2350 K114 and QSK19 CM850 MCRS

The Spring Washer 4970956 is integral to the assembly of the QSK19 CM2350 K114 and QSK19 CM850 MCRS engines. These engines are part of Cummins’ QSK19 series, known for their robust design and high performance in various industrial applications. The spring washer’s role in these engines is to maintain the integrity of the connections, preventing loosening due to vibrations and thermal expansion.

Compatibility and Installation

When installing the Spring Washer 4970956 in the QSK19 CM2350 K114 and QSK19 CM850 MCRS engines, it is essential to follow the manufacturer’s guidelines to ensure proper fit and function. This includes using the correct torque specifications and ensuring that the washer is placed in the designated location within the engine assembly.

Maintenance and Replacement

Regular maintenance checks should include inspecting the Spring Washer 4970956 for any signs of wear or damage. If the washer shows signs of deformation or fatigue, it should be replaced promptly to maintain the engine’s operational integrity. Cummins recommends using genuine parts for replacements to ensure compatibility and performance.

Role of Part 4970956 Spring Washer in Engine Systems

In the context of engine systems, the 4970956 Spring Washer is instrumental in ensuring the proper functioning and longevity of various components.

Integration with Filters

When installed in conjunction with filters, the Spring Washer helps maintain the necessary pressure and sealing integrity. It is often found in filter kits, where it works alongside other components to ensure that the filter media remains securely in place and functions effectively. This is particularly important in high-pressure environments where the filter is subjected to significant stress.

Lubricating Oil Systems

In lubricating oil systems, the Spring Washer plays a supportive role by enhancing the sealing mechanisms within the system. It is commonly used in lubricating oil filter heads, where it assists in maintaining a consistent flow of oil while preventing leaks. This ensures that the oil circulates efficiently, providing optimal lubrication to moving parts and reducing wear and tear.

Oil Bypass Filters

For oil bypass filters, the Spring Washer is essential in managing the pressure differentials that occur during operation. It helps in maintaining the structural integrity of the filter assembly, ensuring that the bypass function operates smoothly. This is vital for the filter’s ability to redirect oil flow when necessary, protecting the engine from damage due to contamination or blockages.

Seal Kits

In seal kits, the Spring Washer is a key component that enhances the reliability of seals across various engine systems. It provides additional compression and support, ensuring that seals remain effective over time. This is particularly beneficial in applications where seals are exposed to high temperatures, fluctuating pressures, and corrosive environments.

Conclusion

The Cummins 4970956 Spring Washer is a versatile and essential component in heavy-duty truck and engine applications. Its role in maintaining secure and reliable bolted connections, enhancing durability, and reducing maintenance requirements makes it a critical part of engine and vehicle systems. Proper installation, regular maintenance, and timely replacement are key to ensuring the optimal performance and longevity of this Cummins part.