4938604
Alternator
Cummins®

The Cummins 4938604 Alternator is a vital component in the operation of commercial trucks. It is designed to ensure the electrical system of the vehicle remains powered, facilitating the operation of various electrical components and maintaining the charge of the battery while the engine is running. Its role is significant in ensuring the truck operates efficiently and reliably ¹.

Basic Concepts of Alternators

An alternator is a device that converts mechanical energy into electrical energy. It functions by using a rotor that spins within a stationary stator, generating an alternating current (AC) that is then converted into direct current (DC) by a rectifier. This DC power is used to charge the battery and power the vehicle’s electrical systems. Alternators differ from generators in that they produce AC, which is then converted to DC, whereas generators directly produce DC ².

Purpose of the 4938604 Alternator

This Cummins part plays a role in the operation of a truck by charging the battery and powering electrical components while the engine is running. It ensures that the electrical system has a consistent power supply, which is crucial for the operation of lights, radios, and other electronic devices in the vehicle ³.

Key Features

The 4938604 Alternator is characterized by its robust design and construction materials, which include high-quality metals and durable components. These features contribute to its performance and longevity. Unique attributes such as advanced cooling systems and efficient voltage regulation enhance its reliability and effectiveness in various operating conditions ⁴.

Benefits

Using this part offers several benefits, including improved reliability, efficiency, and longevity compared to other alternators. These advantages contribute to the overall performance and maintenance of the truck, reducing the need for frequent repairs and replacements ⁵.

Installation and Compatibility

The installation process of the 4938604 Alternator involves specific requirements and considerations to ensure proper fit and function. It is compatible with various truck models and engine types, making it a versatile choice for fleet managers and truck owners ⁶.

Troubleshooting and Maintenance

Common issues with the 4938604 Alternator can be identified through signs of failure such as dimming lights or a dead battery. Diagnostic procedures involve checking the alternator’s output and connections. Maintenance tips include regular inspections and cleaning to ensure optimal performance and longevity ⁷.

Performance in Various Conditions

The 4938604 Alternator is designed to perform under different operating conditions, including extreme temperatures, high altitudes, and heavy-duty usage. Its robustness and reliability in challenging environments make it a preferred choice for commercial truck applications ⁸.

Cummins Corporation

Cummins Inc. is a renowned manufacturer with a history of producing high-quality automotive components. The company’s reputation in the industry is built on its commitment to quality and innovation, ensuring that its products, including the 4938604 Alternator, meet the highest standards of performance and reliability ⁹.

Customer Reviews and Feedback

Customer reviews and feedback on the Cummins 4938604 Alternator highlight its performance and reliability. Common praises include its durability and efficiency, while criticisms may point to specific installation challenges. This feedback provides valuable insights into the alternator’s real-world performance ¹⁰.

Warranty and Support

Cummins offers a warranty for the 4938604 Alternator, providing coverage details and customer support services. Guidance on how to access warranty claims and technical support is available, ensuring that customers have the necessary resources to address any issues that may arise ¹¹.

Compatibility Overview

The 4938604 Alternator is designed to fit a range of Cummins engines, ensuring reliable power generation across various applications. Here is a detailed overview of its compatibility with specific engine models:

Cummins 4B3.9 Engines

The 4938604 alternator is compatible with the 4B3.9 engine series, providing robust power output and efficient charging for these engines.

Cummins 6B5.9 Engines

This alternator is also suitable for the 6B5.9 engine series, offering reliable performance and durability. It is engineered to meet the power demands of these engines effectively.

Cummins 6C8.3 Engines

The 4938604 alternator is compatible with the 6C8.3 engine series, ensuring optimal charging and power management for these engines.

Cummins B5.9 GAS PLUS CM556 Engines

For the B5.9 GAS PLUS CM556 engines, the 4938604 alternator provides a perfect fit, ensuring efficient power generation and reliable operation.

Cummins QSB5.9 CM850 Engines

The 4938604 alternator is designed to work seamlessly with the QSB5.9 CM850 engines, offering a reliable power source for these engines.

Cummins QSB6.7 M CM2250 Engines

This alternator is compatible with the QSB6.7 M CM2250 engines, ensuring efficient power generation and reliable performance.

Cummins QSC8.3 CM850 (CM2850) Engines

The 4938604 alternator is suitable for the QSC8.3 CM850 (CM2850) engines, providing robust power output and efficient charging capabilities.

Cummins QSM11 CM570 Engines

Finally, the 4938604 alternator is compatible with the QSM11 CM570 engines, ensuring reliable power generation and efficient charging for these engines.

By ensuring compatibility with these diverse engine models, the 4938604 Alternator offers a versatile solution for maintaining power integrity across various applications.

Understanding the Role of 4938604 Alternator in Engine Systems

The alternator, specifically part 4938604, is a vital component in the engine system, responsible for generating electrical power to sustain the vehicle’s electrical systems while the engine is running. This component interfaces with several other systems and parts to ensure efficient operation and reliability.

Integration with the Engine

The alternator is driven by a belt connected to the engine’s crankshaft. As the engine runs, the crankshaft’s rotation is transferred to the alternator via this belt, enabling the alternator to generate electricity. This electrical energy is essential for powering the vehicle’s electrical systems and recharging the battery ¹².

Relationship with the Battery

Part 4938604 alternator works in conjunction with the battery to maintain the vehicle’s electrical supply. While the battery provides the initial power needed to start the engine, the alternator takes over once the engine is running, supplying continuous power to the electrical systems and recharging the battery. This symbiotic relationship ensures that the battery remains charged and ready for the next start-up cycle ¹³.

Interaction with the Electrical System

The alternator supplies power to various electrical components within the vehicle, including the ignition system, lighting, climate control, and entertainment systems. It ensures that these systems operate smoothly and consistently, regardless of the engine’s load or speed ¹⁴.

Coordination with the Voltage Regulator

To maintain a stable electrical supply, the alternator works with the voltage regulator. The voltage regulator monitors the electrical output of the alternator and adjusts it to maintain a consistent voltage level, typically around 13.5 to 14.5 volts. This regulation prevents overcharging or undercharging of the battery and protects the vehicle’s electrical components from damage ¹⁵.

Support for the Starter Motor

During engine start-up, the alternator assists the starter motor by providing additional electrical power. Once the engine is running, the alternator continues to support the starter motor, ensuring a reliable start even under challenging conditions ¹⁶.

Contribution to Fuel Efficiency

An efficiently operating alternator contributes to overall fuel efficiency. By maintaining a properly charged battery and ensuring the electrical systems function optimally, the alternator helps reduce the strain on the engine, leading to better fuel economy ¹⁷.

Impact on Engine Performance

The alternator’s role extends beyond electrical supply; it also impacts engine performance. A well-functioning alternator ensures that all electrical systems operate within their designed parameters, which can enhance engine responsiveness and overall drivability ¹⁸.

Conclusion

The Cummins 4938604 Alternator is a critical component in the operation of commercial trucks, ensuring the electrical system remains powered and the battery is maintained. Its robust design, advanced features, and compatibility with various engine models make it a reliable and efficient choice for fleet managers and truck owners. Regular maintenance and proper installation are essential to maximize its performance and longevity.