4956241
Air Starting Motor
Cummins®

Introduction

The Cummins 4956241 Air Starting Motor is a specialized component designed for use in commercial trucks. Its primary function is to facilitate the starting of diesel engines using compressed air, a method that is particularly effective in heavy-duty applications. This motor plays a significant role in ensuring that engines start reliably, even under challenging conditions ⁴.

Basic Concepts of Air Starting Motors

Air starting motors operate on the principle of using compressed air to turn the engine over, thereby initiating the combustion process. Unlike traditional electric starters, air starting motors rely on the pressure of compressed air stored in the vehicle’s air reservoirs. This air is directed into the motor, where it expands and drives pistons or turbines to rotate the engine’s crankshaft. This method is especially advantageous in large diesel engines, where the high torque requirements can be more efficiently met by air starting systems ¹.

Purpose and Functionality

The Cummins 4956241 Air Starting Motor is designed to integrate seamlessly into the truck’s starting system. It ensures that the engine can be started reliably, even in conditions where an electric starter might struggle, such as in extremely cold weather or when the battery is weak. The motor’s role is to provide the necessary torque to turn the engine over, allowing the diesel fuel to ignite and the engine to begin operating ².

Key Features

The Cummins 4956241 Air Starting Motor is characterized by several key features that enhance its performance and durability. Its design incorporates robust construction materials that can withstand the high pressures and temperatures associated with air starting systems. Additionally, the motor may include advanced technological aspects such as precision-machined components and sealed bearings to ensure smooth operation and longevity ³.

Benefits

The use of the Cummins 4956241 Air Starting Motor offers several advantages. It provides improved starting reliability, which is crucial for commercial trucks that need to operate under a wide range of conditions. Additionally, it reduces wear on the engine by providing a more consistent and powerful starting force compared to electric starters. The motor also enhances performance in cold weather conditions, where traditional starters may fail to operate effectively ⁴.

Installation and Integration

Proper installation of the Cummins 4956241 Air Starting Motor is vital for its effective operation. This process involves ensuring that the motor is correctly aligned with the engine’s crankshaft and that all connections to the air supply system are secure. It may also require adjustments to the truck’s electrical system to ensure compatibility with the air starting mechanism ¹.

Troubleshooting Common Issues

Common issues with the Cummins 4956241 Air Starting Motor can include leaks in the air supply system, worn pistons or turbines, and electrical faults. Troubleshooting these problems involves checking for air leaks, inspecting the motor’s internal components for wear, and ensuring that all electrical connections are secure and functioning correctly ².

Maintenance Practices

To ensure the longevity and optimal performance of the Cummins 4956241 Air Starting Motor, regular maintenance is recommended. This includes periodic inspections for wear and damage, lubrication of moving parts, and cleaning of the motor and its components to prevent the buildup of dirt and debris. Adhering to these maintenance practices can help prevent unexpected failures and extend the motor’s service life ³.

Safety Considerations

When working with the Cummins 4956241 Air Starting Motor, it is important to observe several safety guidelines. These include ensuring that the air supply system is depressurized before beginning any work, wearing appropriate personal protective equipment, and following all manufacturer instructions for installation, operation, and maintenance. These precautions help prevent accidents and ensure safe operation of the motor ⁴.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and a strong reputation in the industry, Cummins is committed to providing high-quality components that meet the demanding requirements of commercial and industrial applications. The company’s dedication to excellence is evident in its wide range of diesel engines and related components, including the Cummins 4956241 Air Starting Motor ¹.

Compatibility with Cummins Engines

The Cummins Air Starting Motor part number 4956241 is designed to be compatible with a range of Cummins engines, ensuring reliable and efficient starting performance. This air starting motor is engineered to provide robust power, making it suitable for various industrial and marine applications.

For the K19 engine, the 4956241 air starting motor integrates seamlessly, offering a dependable starting solution that meets the stringent demands of this engine model. Its design ensures minimal downtime and optimal performance, crucial for maintaining productivity in demanding environments.

The QSK19 engine also benefits from the 4956241 air starting motor, which is tailored to fit the specific requirements of this engine. This compatibility ensures that the starting process is smooth and efficient, contributing to the overall reliability and performance of the QSK19 engine.

In the case of the CM850 engine, the 4956241 air starting motor is engineered to provide the necessary power and reliability. Its design allows for easy installation and integration, ensuring that the engine starts quickly and efficiently, even in challenging conditions.

The MCRS engine is another beneficiary of the 4956241 air starting motor. This motor is specifically designed to fit the MCRS engine, providing a reliable starting solution that enhances the engine’s performance and durability. Its robust construction and efficient design make it an ideal choice for the MCRS engine.

Overall, the Cummins Air Starting Motor part number 4956241 is a versatile and reliable component that enhances the starting performance of the K19, QSK19, CM850, and MCRS engines. Its compatibility with these engines ensures that operators can rely on efficient and dependable starting, contributing to the overall performance and longevity of their equipment ².

Role of Part 4956241 Air Starting Motor in Engine Systems

The part 4956241 Air Starting Motor is an integral component in the operation of various engine systems, particularly in marine and industrial applications where air start systems are prevalent. This motor is designed to convert the potential energy stored in compressed air into mechanical energy, which is essential for initiating the rotation of the engine’s crankshaft.

When integrated into an engine system, the Air Starting Motor works in conjunction with several key components to ensure a smooth and efficient start-up process.

Interaction with the Starting System

1. Starting Valves: The Air Starting Motor relies on starting valves to regulate the flow of compressed air. These valves open to allow air into the motor cylinders, initiating the start-up sequence. The precise timing and control provided by these valves are vital for the motor’s performance ³.

2. Crankshaft: Once the Air Starting Motor is activated, it imparts rotational force to the crankshaft. This force is transmitted through the flywheel, helping to overcome the engine’s inertia and begin the combustion cycle.

3. Flywheel: The flywheel plays a significant role in stabilizing the engine’s rotation. As the Air Starting Motor turns the crankshaft, the flywheel stores rotational energy, which helps to smooth out the engine’s start-up process and maintain consistent RPMs.

4. Compressor: In systems where the Air Starting Motor is used, a compressor is often part of the setup to generate the necessary compressed air. The compressor ensures a steady supply of air, which is crucial for the motor’s operation.

5. Governor: The governor helps in regulating the speed of the engine once it has started. It works in tandem with the Air Starting Motor to ensure that the engine reaches and maintains the desired operational speed.

6. Lubricating System: Proper lubrication is essential for the Air Starting Motor’s longevity and efficiency. The lubricating system ensures that all moving parts within the motor are adequately coated with oil, reducing friction and wear.

7. Exhaust System: After the start-up process, the exhaust system plays a role in expelling the spent air from the Air Starting Motor cylinders. Efficient exhaust management is key to maintaining the motor’s performance and preventing backpressure issues.

In summary, the part 4956241 Air Starting Motor is a pivotal element in the start-up sequence of engine systems, working seamlessly with various components to ensure a reliable and efficient engine start ⁴.

Conclusion

The Cummins 4956241 Air Starting Motor is a critical component for the reliable and efficient starting of diesel engines in commercial trucks and other heavy-duty applications. Its design, compatibility with various Cummins engines, and integration with the engine’s starting system make it an essential part for ensuring optimal engine performance and longevity. Regular maintenance and adherence to safety guidelines are crucial for maximizing the benefits of this motor.