3935642
Starting Motor Spacer
Cummins®

Introduction

The Cummins 3935642 Starting Motor Spacer is a critical component in the starting systems of commercial trucks. It ensures proper alignment and spacing between the starting motor and the engine, facilitating efficient and reliable engine starts. This spacer is essential for the operation of commercial trucks, contributing to the overall performance and reliability of the vehicle’s starting system.

Function and Operation

The Starting Motor Spacer provides the necessary distance and alignment between the starting motor and the engine’s flywheel. This spacing is vital for the proper engagement of the starter gear with the flywheel ring gear, ensuring smooth and consistent starts. The spacer interacts with other components such as the starter motor, flywheel, and mounting brackets, maintaining the structural integrity and operational efficiency of the starting system.

Key Features

This Cummins part is constructed from durable materials, ensuring it can withstand the rigors of commercial truck operation. Its design specifications include precise dimensions to ensure optimal fit and function within the starting system. Unique attributes of this spacer may include enhanced durability features, such as corrosion-resistant coatings or reinforced construction, which contribute to its performance and longevity ¹.

Benefits

The use of the Starting Motor Spacer offers several benefits. It contributes to improved starting reliability by ensuring proper alignment and spacing, which reduces the likelihood of starting issues. Additionally, it helps in reducing wear on starting motor components by maintaining correct engagement distances, thereby enhancing the overall performance and lifespan of the starting system ².

Installation and Maintenance

Proper installation of the Starting Motor Spacer involves ensuring that it is correctly aligned and securely fastened between the starting motor and the engine. Preparations may include cleaning the mating surfaces and inspecting for any damage or wear that could affect performance. Regular maintenance checks should be conducted to ensure the spacer remains in good condition, with any signs of wear or damage addressed promptly to maintain optimal starting system performance.

Troubleshooting

Common issues with the Starting Motor Spacer may include misalignment, wear, or damage, which can lead to starting difficulties or increased wear on the starting motor and flywheel. Troubleshooting steps involve inspecting the spacer for signs of damage, ensuring it is correctly installed, and replacing it if necessary to resolve starting issues effectively.

Manufacturer Information

Cummins Inc. is a renowned manufacturer in the automotive industry, known for its commitment to quality and innovation in manufacturing automotive components. With a history of producing reliable and high-performance parts, Cummins has established a reputation for excellence in the commercial truck sector, continually advancing its product offerings to meet the evolving needs of the industry ³.

Compatibility

The 3935642 Starting Motor Spacer is designed to fit seamlessly with several engine models, ensuring a secure and precise installation of the starting motor. This part is crucial for maintaining the alignment and functionality of the starting motor, which is essential for the engine’s startup process.

Engine Compatibility

• 4B3.9 Engine: The 3935642 Starting Motor Spacer is specifically engineered to fit the 4B3.9 engine. This engine model benefits from the precise fit and robust construction of the spacer, ensuring that the starting motor operates efficiently and reliably.
• 6B5.9 Engine: Similarly, the 6B5.9 engine is another model that is compatible with the 3935642 Starting Motor Spacer. This part ensures that the starting motor is correctly positioned, which is vital for the engine’s performance and longevity.
• Grouped Engine Models: For the 4B3.9 and 6B5.9 engines, the 3935642 Starting Motor Spacer provides a standardized solution, making it easier for technicians and mechanics to maintain and repair these engines. The compatibility of this part across these models highlights its versatility and importance in the engine’s starting system.

Role in Engine Systems

In the orchestration of engine components, the 3935642 Starting Motor Spacer assumes a significant function. This component is strategically positioned between the starting motor and the engine block, ensuring precise alignment and optimal performance.

When the starting motor is engaged, the Starting Motor Spacer facilitates a smooth transfer of rotational force from the motor to the flywheel. This transfer is essential for the initial cranking of the engine, setting the stage for combustion.

Moreover, the Starting Motor Spacer plays a part in the mounting process. It provides a stable interface for the starting motor, ensuring that it is securely fastened to the engine block. This stability is paramount during the engine’s operation, as it prevents undue stress on the starting motor and maintains the integrity of the mounting system.

Conclusion

In summary, the 3935642 Starting Motor Spacer is an integral component in the engine’s starting mechanism, contributing to the efficient and reliable operation of the engine system. Its precise alignment and spacing capabilities, combined with its durable construction, make it a vital part of the starting system in commercial trucks.