2871256
Starting Motor
Cummins®

Introduction

The Cummins 2871256 Starting Motor is a component designed for use in commercial trucks. Its purpose is to initiate engine operation by converting electrical energy into mechanical energy, which turns the engine over and allows for combustion to begin. This motor is significant in ensuring that trucks start reliably under various conditions, contributing to the overall efficiency and performance of the vehicle ¹.

Basic Concepts of Starting Motors

Starting motors function by using electrical energy stored in the vehicle’s battery to create mechanical motion. This is achieved through the interaction of several components, including the solenoid, armature, and commutator. When the ignition is turned on, the solenoid engages, allowing current to flow to the armature. The armature then rotates within the motor’s magnetic field, generating the torque needed to turn the engine over ².

Purpose of the Cummins 2871256 Starting Motor

The Cummins 2871256 Starting Motor plays a role in the operation of a truck by engaging with the engine’s flywheel to facilitate starting. It ensures that the engine turns over sufficiently to allow for ignition and subsequent operation. This motor is integral to the reliable ignition of the engine, especially in commercial trucks where consistent performance is crucial ³.

Key Features

The Cummins 2871256 Starting Motor is characterized by its robust design and construction, utilizing high-quality materials to ensure durability and performance. It features precise electrical specifications tailored for optimal operation in commercial truck environments. Unique attributes of this motor include enhanced resistance to wear and tear, and design features that improve efficiency and reliability ⁴.

Benefits

The Cummins 2871256 Starting Motor offers several advantages, including improved starting reliability across a range of operating conditions. Its design contributes to enhanced performance, ensuring that trucks start efficiently even in challenging environments. Additionally, the motor’s construction and features may contribute to overall engine efficiency and longevity by reducing the strain on the starting system ¹.

Installation and Integration

Proper installation of the Cummins 2871256 Starting Motor within a truck’s engine system involves several steps. Preparations include ensuring the engine is in a neutral position and the battery is disconnected for safety. Alignment procedures are critical to ensure the motor engages correctly with the flywheel. Connection requirements involve securing electrical connections and ensuring all components are properly fastened ⁴.

Troubleshooting Common Issues

Common issues with the Cummins 2871256 Starting Motor may include difficulty starting, unusual noises during operation, or electrical malfunctions. Diagnostic steps for these problems involve checking electrical connections, inspecting the motor for physical damage, and testing the solenoid and armature for proper function. Potential solutions may range from simple adjustments to component replacement, depending on the issue identified ⁴.

Maintenance Tips

To ensure the optimal performance and longevity of the Cummins 2871256 Starting Motor, routine maintenance practices are recommended. This includes regular inspection intervals to check for signs of wear or damage, cleaning procedures to remove any debris that may affect operation, and lubrication guidelines to ensure moving parts operate smoothly. Adhering to these maintenance tips can help prevent issues and extend the life of the motor ⁴.

Cummins Overview

Cummins Inc. is a well-established manufacturer in the automotive industry, known for its high-quality components and commitment to innovation. With a history of producing reliable and efficient engines and parts, Cummins has built a reputation for excellence. The company’s dedication to manufacturing superior automotive components is evident in products like the Cummins 2871256 Starting Motor, which embodies their standards of quality and performance ⁴.

Compatibility of Cummins Part 2871256 with Various Engine Models

The Cummins part 2871256, a Starting Motor, is designed to be compatible with a range of engine models. This part is engineered to ensure reliable and efficient starting capabilities across multiple engine types. Below is a detailed overview of the engines with which this starting motor is compatible:

ISM Series

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

The ISM series engines, including the ISM CM570, ISM CM570/870, ISM CM876, and ISM11 CM876 SN, are designed for heavy-duty applications. The part 2871256 is specifically engineered to fit these models, ensuring robust performance and durability in demanding conditions.

ISX Series

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

The ISX series engines, such as the ISX CM570, ISX CM870, ISX CM871, ISX15 CM2250, ISX15 CM2250 SN, and ISX15 CM2350 X101, are known for their high power output and efficiency. The part 2871256 is compatible with these models, providing a reliable starting solution that meets the rigorous demands of these engines.

M11 Series

• M11 CELECT PLUS
• M11 MECHANICAL

The M11 series engines, including the M11 CELECT PLUS and M11 MECHANICAL, are designed for versatility and performance. The part 2871256 is engineered to fit these engines, ensuring seamless integration and dependable starting performance.

N14 Series

• N14 MECHANICAL

The N14 MECHANICAL engine is a robust and reliable option for heavy-duty applications. The part 2871256 is compatible with this model, providing a starting motor that can handle the demands of this engine.

NH/NT Series

• NH/NT 855

The NH/NT 855 engine is designed for durability and efficiency. The part 2871256 is compatible with this model, ensuring reliable starting capabilities.

QSM11 Series

• QSM11 CM570

The QSM11 CM570 engine is known for its power and efficiency. The part 2871256 is compatible with this model, providing a reliable starting motor solution.

QST30 Series

• QST30 CM552

The QST30 CM552 engine is designed for high performance. The part 2871256 is compatible with this model, ensuring dependable starting capabilities.

QSX11 Series

• QSX11.9 CM2250 ECF

The QSX11.9 CM2250 ECF engine is known for its efficiency and power. The part 2871256 is compatible with this model, providing a reliable starting motor solution.

X15 Series

• X15 CM2350 X101
• X15 CM2350 X116B
• X15 CM2350 X123B

The X15 series engines, including the X15 CM2350 X101, X15 CM2350 X116B, and X15 CM2350 X123B, are designed for high performance and reliability. The part 2871256 is compatible with these models, ensuring reliable starting capabilities.

Role of Part 2871256 Starting Motor in Engine Systems

Part 2871256 Starting Motor is integral to the functionality of the engine system, facilitating the initial rotation of the engine that leads to combustion. When the ignition is activated, the starting motor engages with the flywheel or flexplate, providing the necessary torque to overcome static friction and inertia. This action initiates the engine’s rotation, allowing the pistons to move within the cylinders ².

The starting motor works in conjunction with the battery, which supplies the electrical energy required for its operation. Once engaged, the starting motor draws current from the battery, converting electrical energy into mechanical energy to turn the engine. This process is seamless and rapid, ensuring that the engine reaches the necessary RPM for combustion to occur ³.

Additionally, the starting motor interacts with the starter solenoid, which acts as an electrical switch. The solenoid engages the starter motor with the flywheel, ensuring a secure connection during the start-up process. This interaction is vital for the efficient transfer of power from the starting motor to the engine ⁴.

Furthermore, the starting motor is designed to disengage once the engine has started and is self-sustaining. This disengagement is typically managed by a Bendix drive or similar mechanism, which ensures that the starting motor does not continue to turn once the engine is running, thereby preventing unnecessary wear and tear ⁴.

Conclusion

In summary, part 2871256 Starting Motor plays a significant role in the engine system by providing the initial mechanical force needed to start the engine, working in harmony with the battery, solenoid, and other components to ensure a smooth and reliable start-up process. Its robust design, compatibility with various engine models, and integration within the engine system highlight its importance in the reliable operation of commercial trucks ¹²³⁴.