4906788
Starting Motor
Cummins®

Introduction

The Cummins 4906788 Starting Motor is a component designed for use in commercial trucks. It serves the purpose of initiating engine start-up, which is a fundamental requirement for the operation of these vehicles. The significance of this starting motor lies in its ability to ensure that the engine starts reliably under various conditions, contributing to the overall efficiency and performance of the truck ¹.

Basic Concepts of Starting Motors

Starting motors are integral to internal combustion engines, providing the necessary torque to turn the engine over and initiate combustion. These motors consist of several basic components, including the armature, field coils, commutator, and brushes. When electrical current is applied, the interaction between the magnetic fields generated by the field coils and the armature causes the motor to rotate, thereby cranking the engine ².

Purpose of the Cummins 4906788 Starting Motor

The Cummins 4906788 Starting Motor plays a role in the operation of a truck by initiating engine start-up. It ensures that the engine components begin to move, allowing for the compression of air and fuel within the cylinders. This action leads to combustion, which powers the engine and enables the truck to operate. Reliable performance of the starting motor is vital for consistent engine start-ups, especially in demanding commercial applications ³.

Key Features

The Cummins 4906788 Starting Motor is characterized by its robust design and construction materials, which include high-quality metals and durable electrical components. It incorporates technological advancements such as improved brush materials and enhanced commutator design, which contribute to its efficiency and longevity. These features are tailored to meet the rigorous demands of commercial truck environments.

Benefits

The advantages of the Cummins 4906788 Starting Motor include improved reliability, efficiency, and performance. Its design allows for consistent engine start-ups, even in challenging conditions. The motor’s efficiency contributes to reduced electrical draw during start-up, which can lead to better overall fuel economy. Additionally, its performance ensures that commercial trucks remain operational with minimal downtime.

Installation Process

Installing the Cummins 4906788 Starting Motor involves several steps. First, ensure the truck’s battery is disconnected to prevent electrical shocks. Then, remove the old starting motor by disconnecting electrical connections and unbolting it from the engine. Position the new motor in place, secure it with the appropriate bolts, and reconnect the electrical terminals. Finally, re-engage the battery and test the motor to confirm proper installation.

Common Issues and Troubleshooting

Typical problems associated with starting motors can include difficulty in engine cranking, unusual noises during operation, or complete failure to start. Troubleshooting may involve checking electrical connections for corrosion or damage, inspecting the battery for adequate charge, and examining the motor for signs of wear or malfunction. Solutions can range from cleaning and tightening connections to replacing worn components or the motor itself.

Maintenance Tips

To ensure the longevity and optimal performance of the Cummins 4906788 Starting Motor, routine maintenance practices are recommended. These include regular inspection for signs of wear or damage, cleaning the motor and its connections to prevent corrosion, and ensuring that all electrical connections are secure and free from debris. Lubrication of moving parts, where applicable, can also contribute to the motor’s efficiency and durability.

Safety Considerations

When working with starting motors, it is important to follow safety precautions and guidelines. This includes wearing appropriate personal protective equipment, ensuring the truck’s battery is disconnected before beginning any work, and adhering to manufacturer recommendations for installation and maintenance. Proper handling of the motor and its components is crucial to avoid injury and ensure the motor’s reliable operation.

Cummins Overview

Cummins Inc. is a company with a long-standing reputation in the industry for innovation and quality in the production of automotive components. Founded with a commitment to excellence, Cummins has consistently delivered reliable and high-performance parts for a wide range of applications, including commercial trucks. Their dedication to advancing technology and maintaining high standards has established them as a trusted name in the automotive sector.

Cummins Engine Compatibility with Part 4906788 Starting Motor

The Cummins part 4906788 Starting Motor is designed to fit a range of Cummins engines, ensuring reliable and efficient engine start-up across various applications. Here are the engines that are compatible with this specific starting motor:

K19 Series

• K19
• QSK19 CM2350 K114
• QSK19 CM500
• QSK19 CM850 MCRS
• QSK19G

The K19 series engines, including the K19, QSK19 CM2350 K114, QSK19 CM500, QSK19 CM850 MCRS, and QSK19G, are designed for heavy-duty applications. The part 4906788 Starting Motor is engineered to provide the necessary power and durability to handle the demanding start-up requirements of these engines.

KTA38GC CM558

• KTA38GC CM558

The KTA38GC CM558 engine is another model that benefits from the part 4906788 Starting Motor. This engine is known for its robust performance and reliability, and the starting motor is specifically designed to ensure smooth and efficient engine start-up under various operating conditions.

V28

• V28

The V28 engine is also compatible with the part 4906788 Starting Motor. This engine is designed for high-performance applications, and the starting motor ensures that it can start reliably even in challenging environments.

Each of these engines, while differing in specific applications and configurations, shares the commonality of requiring a high-performance starting motor to ensure reliable operation. The part 4906788 Starting Motor from Cummins is engineered to meet these needs, providing the necessary power and reliability for a variety of heavy-duty applications.

Role of Part 4906788 Starting Motor in Engine Systems

The Part 4906788 Starting Motor is an integral component within the engine system, facilitating the initial rotation of the engine to start the combustion process. When the ignition is activated, the starting motor engages with the flywheel or flexplate, which is connected to the crankshaft. This engagement allows the motor to turn the crankshaft, initiating the engine’s operation.

In conjunction with the Engine Mounting Parts Kit, the starting motor ensures that the engine is securely positioned within the vehicle’s frame. This kit includes various brackets, mounts, and fasteners that hold the engine in place, allowing the starting motor to effectively transmit rotational force without causing undue stress or movement of the engine.

The Motor component, in this context, refers to the electrical motor within the starting system that converts electrical energy from the battery into mechanical energy. This mechanical energy is then used to turn the engine over. The efficiency and reliability of this motor are essential for consistent engine starts, especially in varying environmental conditions.

Lastly, the Starting component encompasses the entire starting system, including the starter solenoid, battery, and ignition switch. The starting motor works in harmony with these elements to ensure a smooth and reliable engine start. The solenoid, for instance, engages the starter motor with the flywheel, while the battery provides the necessary electrical power. The ignition switch controls the flow of electricity to the starting motor, initiating the start sequence.

In summary, the Part 4906788 Starting Motor plays a significant role in the engine system by providing the initial rotational force needed to start the engine, working in concert with the engine mounting parts kit, motor, and the broader starting system components.

Conclusion

The Cummins 4906788 Starting Motor is a critical component for the reliable start-up of commercial truck engines. Its robust design, advanced features, and compatibility with a range of Cummins engines make it an essential part for maintaining the efficiency and performance of heavy-duty vehicles. Proper installation, maintenance, and adherence to safety guidelines are crucial for ensuring the longevity and optimal operation of this starting motor.