2871255
Starting Motor
Cummins®

Introduction

The Cummins 2871255 Starting Motor is a critical component for commercial trucks, designed to convert electrical energy into mechanical energy to initiate engine operation. This motor ensures reliable engine start-up under various conditions, enhancing the overall efficiency and performance of the vehicle ³.

Basic Concepts of Starting Motors

Starting motors function by converting electrical energy into mechanical energy to start the engine. Key components include the solenoid, armature, and commutator. The solenoid acts as an electromagnetic switch, engaging the starter drive with the engine’s flywheel. The armature generates a magnetic field when current flows through it, creating rotational motion. The commutator ensures the current flows in the correct direction to maintain this rotation, enabling the starting motor to engage with the engine and start it ¹.

Purpose and Role of the 2871255 Starting Motor

This Cummins part is essential for initiating engine start-up in trucks. When the ignition is turned on, the motor’s solenoid activates, engaging the starter drive with the engine’s flywheel. The armature then rotates, driven by the magnetic field it generates, which in turn rotates the flywheel and starts the engine. This motor is designed to ensure reliable engine start-up under various conditions, including cold weather and after long periods of inactivity ³.

Key Features

The 2871255 Starting Motor is known for its robust design and construction, utilizing high-quality materials to ensure durability and performance. Its electrical specifications are tailored for efficient energy conversion, and it incorporates advanced features such as an improved commutator design for better electrical conductivity and a durable housing that protects internal components from environmental factors ³.

Benefits

This Cummins part offers several benefits, including improved starting reliability, enhanced durability in harsh environments, and efficiency in energy conversion. Its design ensures consistent performance, even in challenging conditions, and its compatibility with Cummins engines makes it a reliable choice for commercial truck applications. The motor’s efficiency in converting electrical energy to mechanical energy contributes to reduced energy consumption and improved overall engine performance ³.

Installation and Integration

Proper installation and integration of the 2871255 Starting Motor into commercial trucks are essential for ensuring optimal performance and longevity. Installation guidelines recommend following manufacturer specifications for mounting, electrical connections, and alignment with the engine’s flywheel. Specific requirements may include ensuring the motor is securely mounted to prevent vibration-related issues and that electrical connections are clean and tight to prevent resistance and ensure efficient energy transfer ².

Troubleshooting and Maintenance

Common issues with the 2871255 Starting Motor include difficulty starting, unusual noises, or electrical problems. Troubleshooting these issues may involve checking electrical connections for corrosion or looseness, inspecting the solenoid for proper operation, and ensuring the armature and commutator are free of debris and wear. Maintenance tips to prolong the life of the starting motor include regular inspection of electrical connections, cleaning the motor’s exterior to prevent dirt and moisture accumulation, and following manufacturer recommendations for periodic maintenance checks ³.

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 quality, Cummins has established a reputation for manufacturing reliable and efficient components for commercial vehicles. The company’s commitment to innovation is evident in its continuous development of advanced technologies and solutions that meet the evolving needs of the transportation industry ³.

Compatibility of Cummins Starting Motor 2871255

The Cummins Starting Motor part number 2871255 is designed to fit a variety of Cummins engines, ensuring reliable and efficient starting performance across different engine models. Here is a detailed look at the compatibility of this starting motor with various Cummins engines:

ISM Series

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN

The ISM series engines benefit from the robust design of the 2871255 starting motor, which provides the necessary power and durability for these industrial and marine applications.

ISX Series

• ISX CM570
• ISX CM870
• ISX CM871
• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

The ISX series engines, known for their high performance and efficiency, are well-suited to the 2871255 starting motor. This part ensures smooth and reliable starts, even under demanding conditions.

M11 Series

• M11 CELECT PLUS

The M11 CELECT PLUS engine, designed for medium-duty applications, is compatible with the 2871255 starting motor, offering dependable starting performance.

QSM11 Series

• QSM11 CM570

The QSM11 CM570 engine, often used in construction and agricultural equipment, is another model that pairs well with the 2871255 starting motor.

QSX15 Series

• QSX15 CM2250 ECF
• QSX15 CM2350 X105

The QSX15 series engines, which are known for their advanced emissions control features, are compatible with the 2871255 starting motor, ensuring efficient and reliable starting.

X15 Series

• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

The X15 series engines, designed for heavy-duty applications, are also compatible with the 2871255 starting motor, providing the necessary power and reliability for these demanding environments.

Role of Part 2871255 Starting Motor in Engine Systems

The 2871255 Starting Motor is integral to the operation of various engine systems, 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, turning the crankshaft. This action compresses the air-fuel mixture in the cylinders, allowing the spark plugs to ignite it.

In gasoline engines, the starting motor works in conjunction with the fuel injection system, ensuring that the correct amount of fuel is delivered as the engine begins to run. It also interacts with the ignition system, timing the spark to coincide with the compression stroke.

In diesel engines, the starting motor must overcome the higher compression ratios, requiring more torque. It operates alongside the glow plug system, which preheats the combustion chamber for easier starting in cold conditions.

For hybrid and electric vehicles, the starting motor often doubles as a generator, contributing to the regenerative braking system by converting kinetic energy back into electrical energy.

Overall, the starting motor is a fundamental component that ensures the seamless initiation of engine operation across different types of engine systems ³.

Conclusion

The Cummins 2871255 Starting Motor is a vital component for commercial trucks, ensuring reliable and efficient engine start-up under various conditions. Its robust design, advanced features, and compatibility with a wide range of Cummins engines make it a reliable choice for commercial truck applications. Proper installation, maintenance, and troubleshooting are essential for ensuring optimal performance and longevity of this part.