4988276
Alternator
Cummins®

The Cummins 4988276 Alternator is a component designed for use in commercial trucks, playing a significant role in the vehicle’s electrical system. Its purpose is to generate electrical power to charge the battery and supply power to the truck’s electrical components while the engine is running. This ensures that the truck operates efficiently and reliably under various conditions 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 vehicle’s battery and power electrical components. Alternators differ from generators in that they produce AC, which is then converted to DC, whereas generators directly produce DC ².

Purpose of the Cummins 4988276 Alternator

This Cummins part serves to maintain the electrical system of a truck by charging the battery and providing power to electrical components such as lights, radios, and other accessories while the engine is running. This ensures that the truck’s electrical system remains functional, supporting both the engine’s operation and the comfort and safety features for the driver.

Key Features

This part is characterized by its robust design and high build quality, ensuring durability and reliability in demanding commercial truck environments. It incorporates advanced technological features that enhance its efficiency and performance. These features may include improved heat dissipation, enhanced electrical regulation, and a compact design that fits within the constraints of a truck’s engine compartment ³.

Benefits

Utilizing this part offers several advantages. It provides improved reliability, ensuring consistent performance under various operating conditions. Its enhanced efficiency contributes to better fuel economy, and its durable construction can lead to potential cost savings over time by reducing the need for frequent replacements or repairs.

Installation Considerations

Proper installation of this part is crucial for its optimal performance and longevity. Installation procedures should follow manufacturer guidelines, ensuring that all connections are secure and that the alternator is properly aligned and mounted. Special considerations may include verifying the electrical system’s compatibility and ensuring that the alternator is correctly matched to the truck’s engine and electrical requirements.

Troubleshooting and Maintenance

To ensure the longevity and optimal performance of this part, routine maintenance and troubleshooting are recommended. Common troubleshooting steps include checking for loose connections, inspecting the belt for wear, and testing the alternator’s output. Regular maintenance practices may involve cleaning the alternator and its connections, ensuring proper belt tension, and monitoring the electrical system for any signs of distress.

Performance in Various Conditions

This part is designed to perform reliably under a range of operating conditions, including extreme temperatures, high altitudes, and heavy-duty usage. Its robust construction and advanced features allow it to maintain efficient operation, ensuring that the truck’s electrical system remains functional regardless of the environmental challenges.

Compatibility With Other Systems

This part is engineered to be compatible with a variety of truck models and electrical systems. However, it is important to verify compatibility with specific truck models to ensure seamless integration and optimal performance. Potential integration challenges may arise with older electrical systems or those that have been significantly modified, necessitating careful consideration during the installation process.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and power generation products. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The company’s extensive product range and history of excellence make it a trusted name in the automotive and heavy-duty truck sectors.

Cummins Alternator 4988276 Compatibility

The Cummins alternator part number 4988276 is designed to fit a variety of Cummins engines, ensuring reliable power generation across different engine models. This alternator is engineered to meet the specific electrical needs of these engines, providing consistent and efficient performance.

Compatible Engines

• 6B5.9
• 6C8.3
• B4.5
• QSB3.3 CM2150
• QSB3.9 30 CM550
• QSB4.5 CM850 (CM2850)
• QSB5.9 30 CM550
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117
• QSC8.3 CM850 (CM2850)
• QSL8.9 CM2150 L141
• QSL9 CM850 (CM2850)

Grouping of Compatible Engines

The alternator 4988276 is compatible with a range of Cummins engines, grouped by their model series and specifications:

• QSB Series:

  • QSB3.3 CM2150
  • QSB3.9 30 CM550
  • QSB4.5 CM850 (CM2850)
  • QSB5.9 30 CM550
  • QSB6.7 CM850 (CM2850)
  • QSB7 CM2880 B117

• QSC Series:

  • QSC8.3 CM850 (CM2850)

• QSL Series:

  • QSL8.9 CM2150 L141
  • QSL9 CM850 (CM2850)

• Other Models:

  • 6B5.9
  • 6C8.3
  • B4.5

This comprehensive compatibility ensures that the alternator can be used across various applications, providing a reliable power source for the specified engines.

Role of Part 4988276 Alternator in Engine Systems

This part is an essential component in the electrical system of an engine. It is responsible for converting mechanical energy from the engine into electrical energy, which is then used to power various electrical components and recharge the battery.

When the engine is running, the alternator is driven by a belt connected to the crankshaft. As the crankshaft rotates, it spins the alternator’s rotor inside the stator, generating an electrical current. This current is then regulated by the voltage regulator to ensure a consistent output, typically around 13.5 to 14.5 volts for most automotive applications.

The electrical energy produced by the alternator is distributed throughout the engine system via the wiring harness. It powers essential components such as the ignition system, fuel injection system, and various sensors. Additionally, it supplies power to accessories like the headlights, air conditioning system, and entertainment systems.

In modern engine systems, the alternator also plays a role in supporting start-stop systems. These systems automatically shut off the engine when the vehicle is idling to save fuel and reduce emissions. The alternator quickly recharges the battery when the engine restarts, ensuring that there is sufficient power available for all electrical components.

Furthermore, the alternator works in conjunction with the battery to maintain a stable electrical supply. While the battery provides the initial power needed to start the engine, the alternator takes over once the engine is running, keeping the battery charged and providing continuous power to the electrical system.

Conclusion

In summary, the part 4988276 alternator is a vital component that ensures the engine’s electrical system operates efficiently. It supports the ignition, fuel injection, and various sensors, while also powering accessories and maintaining battery charge. Its integration into the engine system is seamless, contributing to the overall performance and reliability of the vehicle.