4920051
Throttle Lever
Cummins®

Introduction

The Cummins 4920051 Throttle Lever is a critical component designed for commercial trucks, enabling precise modulation of engine speed and power output. This part is essential for the driver’s control over the vehicle’s performance, ensuring the engine operates within desired parameters across various driving conditions ¹.

Basic Concepts of Throttle Levers

A throttle lever, such as the 4920051, is a mechanical device within an engine system that regulates the fuel and air mixture entering the engine. Adjusting the throttle lever allows the driver to control engine speed and power, which is vital for maintaining optimal engine performance, ensuring efficient fuel consumption, and providing necessary power for vehicle operation ².

Role of the 4920051 Throttle Lever in Truck Operation

This Cummins part operates by interacting with the truck’s fuel injection system. When the driver moves the lever, it adjusts the amount of fuel injected into the engine, thereby controlling engine speed and power output. This interaction is crucial for the truck’s performance, allowing for smooth acceleration, deceleration, and maintaining a consistent speed. The lever’s precise operation ensures that the engine responds accurately to the driver’s inputs, enhancing both vehicle performance and driver control ³.

Key Features

The 4920051 Throttle Lever is characterized by its robust design and the use of high-quality materials, contributing to its durability and reliability under demanding commercial truck operation conditions. Its design includes ergonomic considerations for the driver, ensuring ease of use and comfort during extended periods of operation. Additionally, its construction is tailored to withstand the rigors of heavy-duty use, providing long-lasting performance.

Benefits

Utilizing the 4920051 offers several advantages. It provides improved engine control, allowing for more precise modulation of engine speed and power. This precision can lead to enhanced driver comfort, as the vehicle’s response to throttle inputs becomes more predictable and smooth. Furthermore, optimal engine control can contribute to increases in fuel efficiency and overall performance, making this part a valuable component for commercial truck operators.

Troubleshooting and Maintenance

Common issues with the 4920051 may include stiffness in operation, inaccurate engine response, or complete failure to adjust engine speed. These symptoms can arise from wear and tear, contamination, or mechanical failure. Regular maintenance practices, such as cleaning the lever and its associated components, inspecting for wear, and ensuring proper lubrication, can help prevent these issues. Prompt attention to any signs of malfunction is recommended to maintain optimal performance and longevity of the lever.

Compatibility with Cummins Engines

This throttle lever is designed to be compatible with several specific Cummins engine models, including the 4B3.9, 6B5.9, 6C8.3, and L8.9 engines. For these engines, the throttle lever ensures smooth and precise control over the engine’s throttle, which is crucial for maintaining optimal performance and efficiency. These engines, known for their robust design and reliability, benefit from the precise functionality that the 4920051 provides.

Interaction with Engine Systems

The Throttle Lever (part 4920051) is integral to the modulation of engine power. It operates in conjunction with the throttle body, accelerator pedal, fuel injection system, cruise control, and various safety systems to deliver a responsive and efficient driving experience. Its role in these systems ensures efficient and responsive engine performance, contributing to the overall effectiveness of the vehicle’s operation.

Conclusion

The Cummins 4920051 Throttle Lever is a vital component for commercial trucks, offering precise control over engine speed and power. Its robust design, compatibility with specific Cummins engines, and integration with various engine systems make it an essential part for maintaining optimal vehicle performance and efficiency. Regular maintenance and prompt attention to any issues ensure the longevity and reliability of this critical component.