2874862
Alternator
Cummins®

The Cummins 2874862 Alternator is a component designed to support the electrical needs of commercial trucks. Its purpose is to maintain the electrical system by charging the battery and powering various electrical components while the engine is running. This alternator is significant in ensuring that trucks operate efficiently and reliably, especially in demanding commercial environments.

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 set of coils, 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 operate 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 ¹.

Purpose of the 2874862 Alternator in Truck Operation

This part plays a role in maintaining the electrical system of a truck by ensuring a consistent power supply. It charges the battery during engine operation and provides the necessary electrical power to run components such as lights, radios, and other systems. This ensures that the truck can operate its electrical systems without draining the battery, which is crucial for prolonged use.

Key Features of the 2874862 Alternator

This Cummins part is characterized by its robust design and construction. It incorporates high-quality materials and advanced technological features to enhance its performance and durability. The alternator is built to withstand the rigors of commercial truck use, featuring a durable housing and efficient internal components. Cummins has integrated specific technological advancements to improve efficiency and reliability ².

Benefits of Using the 2874862 Alternator

The 2874862 Alternator offers several advantages, including high efficiency, durability, and reliability. Its design ensures optimal performance under various conditions, contributing to the overall efficiency of the truck. Cummins alternators are known for their quality and longevity, often outperforming other brands in terms of reliability and efficiency ³.

Troubleshooting and Maintenance Suggestions

To ensure the longevity and optimal performance of this part, regular maintenance and troubleshooting are recommended. Common issues may include irregular charging, unusual noises, or a decrease in electrical output. Performing regular checks, such as inspecting belts and connections, can help identify potential problems early. Following manufacturer guidelines for servicing and maintenance will help maintain the alternator’s performance.

Integration with Truck Electrical Systems

The 2874862 Alternator is designed to integrate seamlessly with the electrical systems of various truck models. It is compatible with different electrical configurations, ensuring that it can be used across a range of commercial vehicles. This compatibility allows for versatile application in the fleet management of commercial trucks.

Performance Under Various Conditions

The 2874862 Alternator is engineered to perform reliably under a variety of operating conditions. It can handle extreme temperatures, high altitudes, and heavy-duty applications with efficiency. The alternator is designed to manage varying loads and stress, ensuring consistent performance regardless of the operating environment.

Environmental and Efficiency Considerations

The 2874862 Alternator contributes to the environmental efficiency of commercial trucks by enhancing fuel efficiency and reducing emissions. Its efficient design ensures that it operates with minimal energy loss, which in turn helps in reducing the overall fuel consumption of the truck. This makes it a valuable component in efforts to improve the environmental impact of commercial vehicle fleets.

Cummins Corporation Overview

Cummins Inc. is a well-established manufacturer with a strong reputation in the industry for producing high-quality automotive components. The company has a history of innovation and commitment to quality, which is reflected in its product line, including the 2874862 Alternator. Cummins continues to lead in the development of efficient and reliable components for the automotive and heavy-duty truck sectors.

Cummins Alternator Part 2874862 Compatibility

The Cummins alternator part number 2874862 is designed to fit a variety of engines within the Cummins engine lineup. This alternator is engineered to provide reliable power generation for the electrical systems of these engines, ensuring optimal performance and longevity. Below is a detailed breakdown of the engines with which this alternator is compatible.

Cummins B and QSB Series Engines

• 4B3.9
• 6B5.9
• B4.5
• B5.9 G
• QSB3.9 30 CM550
• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB5.9 30 CM550
• QSB6.7 CM2250
• QSB6.7 CM2350 B105

These engines, part of the B and QSB series, are commonly used in a variety of applications, from agricultural machinery to industrial equipment. The alternator part 2874862 is specifically designed to match the electrical requirements of these engines, ensuring efficient power generation and system stability.

Cummins ISC and ISL Series Engines

• ISC CM2150
• ISC CM850
• ISC8.3 CM2250
• ISL CM2150
• ISL9 CM2150 SN
• ISL9 CM2250

The ISC and ISL series engines are known for their robust performance and reliability in heavy-duty applications. The Cummins alternator part 2874862 is engineered to provide the necessary power for these engines, ensuring that all electrical components function correctly.

Cummins ISM and ISM CM Series Engines

• ISM CM570
• ISM CM570/870

The ISM series engines are designed for applications requiring high power and efficiency. The alternator part 2874862 is compatible with these engines, providing the necessary electrical power to support their demanding operational requirements.

Cummins K19 and M11 Engines

• K19
• M11 CELECT PLUS

These engines are typically used in specialized applications, such as military and defense. The alternator part 2874862 is designed to meet the stringent requirements of these environments, ensuring reliable power generation under extreme conditions.

Cummins N14 and QSB Engines

• N14 CELECT PLUS
• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB6.7 CM2250
• QSB6.7 CM2350 B105

The N14 and QSB engines are known for their durability and performance in heavy-duty applications. The alternator part 2874862 is compatible with these engines, providing the necessary electrical power to support their demanding operational requirements.

By ensuring compatibility with a wide range of Cummins engines, the alternator part 2874862 offers a versatile solution for maintaining the electrical systems of these engines, ensuring they operate efficiently and reliably.

Role of Part 2874862 Alternator in Engine Systems

The alternator, specifically part 2874862, is integral to the operation of various engine systems. It works in conjunction with the battery, starter motor, and electrical system to ensure the vehicle operates efficiently.

Battery Interaction

The alternator recharges the battery while the engine is running. This is essential for maintaining the battery’s charge level, allowing it to provide the necessary power for starting the engine and operating electrical components when the engine is off.

Starter Motor Support

During engine start-up, the starter motor draws a significant amount of power from the battery. Once the engine is running, the alternator takes over to recharge the battery, ensuring that the starter motor has sufficient power for subsequent starts.

Electrical System Power Supply

The alternator supplies power to the vehicle’s electrical systems, including lights, ignition system, fuel injection system, and various sensors. This ensures that all electrical components function correctly and consistently, enhancing both safety and performance.

Ignition System Integration

In modern vehicles, the alternator plays a role in powering the ignition system. This includes providing the necessary voltage for spark plug operation, which is vital for combustion efficiency and engine performance.

Fuel Injection System

The alternator also supplies power to the fuel injection system. This ensures that the fuel injectors operate correctly, delivering the precise amount of fuel needed for optimal combustion and engine efficiency.

Sensor Operation

Many sensors within the engine management system rely on a stable power supply from the alternator. These sensors monitor various parameters such as engine temperature, oxygen levels, and crankshaft position, providing data that the engine control unit (ECU) uses to make real-time adjustments for optimal performance.

Accessory Power

The alternator powers various accessories such as the air conditioning compressor, power steering pump, and entertainment systems. This ensures that these components operate smoothly and do not drain the battery excessively.

Voltage Regulation

The alternator includes a voltage regulator that maintains a consistent output voltage, typically around 13.8 to 14.4 volts. This regulation is essential for protecting the electrical system from overvoltage, which can damage sensitive components.

Conclusion

In summary, the 2874862 Alternator is a multifaceted component that ensures the reliable operation of the battery, starter motor, electrical system, ignition system, fuel injection system, sensors, and various accessories within the engine system. Its robust design, compatibility with a wide range of Cummins engines, and efficient performance make it a critical component for the reliable and efficient operation of commercial trucks.