4937363
Speed Sensor
Cummins®

Introduction

The Cummins 4937363 Speed Sensor is a component designed to monitor and report the speed of a commercial truck to the engine control unit (ECU). This sensor ensures accurate speed data is available for various systems within the vehicle, contributing to optimal performance and safety ¹.

Basic Concepts of Speed Sensors

Speed sensors measure the rotational speed of a shaft or disk by generating an electrical signal proportional to the speed of the rotating component. In automotive systems, these sensors are used in the transmission, anti-lock braking system (ABS), and engine control systems to provide critical data for efficient operation ².

Purpose of the Cummins 4937363 Speed Sensor

The Cummins 4937363 Speed Sensor is integral to the operation of a truck. It monitors the vehicle’s speed and reports this information to the ECU. This data is used by the ECU to make adjustments to the engine and transmission, ensuring optimal performance and fuel efficiency. The sensor also plays a role in the operation of the ABS, helping to prevent wheel lock-up during braking ³.

Key Features

The Cummins 4937363 Speed Sensor is designed with several features that enhance its performance. It is constructed from durable materials to withstand the harsh conditions often encountered in commercial trucking. The sensor utilizes advanced technology to provide accurate and reliable speed data. Its design ensures easy installation and integration with the truck’s systems.

Benefits of Using the Cummins 4937363 Speed Sensor

The use of the Cummins 4937363 Speed Sensor offers several advantages. It contributes to improved fuel efficiency by providing accurate speed data to the ECU, allowing for precise engine and transmission adjustments. The sensor also enhances vehicle performance by ensuring the ABS operates correctly, improving safety. Additionally, it provides reliable speed data for the ECU, supporting the overall efficiency and performance of the truck.

Integration with Truck Systems

The Cummins 4937363 Speed Sensor integrates seamlessly with various truck systems. It works in conjunction with the transmission to ensure smooth gear changes based on vehicle speed. The sensor also interacts with the braking system, providing data that helps the ABS function correctly. Furthermore, it communicates with the ECU, supplying essential speed information that the ECU uses to manage engine performance.

Troubleshooting Common Issues

Common issues with the Cummins 4937363 Speed Sensor may include inaccurate speed readings or complete sensor failure. Symptoms of these problems can include erratic speedometer behavior, transmission shifting issues, or activation of the ABS warning light. Diagnosing these issues typically involves checking the sensor’s electrical connections, inspecting for physical damage, and using diagnostic tools to read error codes from the ECU.

Maintenance Tips

To ensure the longevity and optimal performance of the Cummins 4937363 Speed Sensor, regular maintenance is recommended. This includes checking the sensor’s electrical connections for corrosion or damage, ensuring it is securely mounted, and cleaning it to remove any dirt or debris that could affect its operation. Regular inspections can help identify potential issues before they lead to sensor failure.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for quality and reliability in the commercial truck industry. The company offers a wide range of products designed to meet the needs of various industries, including transportation, construction, and agriculture.

Cummins Speed Sensor 4937363 Compatibility

The Cummins Speed Sensor part number 4937363 is designed to fit a variety of Cummins engines, ensuring accurate engine speed readings for optimal performance and diagnostics. Below is a breakdown of the engines that are compatible with this speed sensor:

6C Series Engines

• 6C8.3

B Series Engines

• B5.9 GAS PLUS CM556
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125

ISB/ISD Series Engines

• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN

ISBE Series Engines

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

L Series Engines

• L8.9
• L8.9 CM2670 L134C

QSB Series Engines

• QSB4.5 CM850 (CM2850)
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

QSL Series Engines

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

This speed sensor is engineered to provide reliable data for these engines, ensuring that the engine control unit (ECU) can accurately monitor and adjust engine performance parameters.

Role of Part 4937363 Speed Sensor in Engine Systems

The Part 4937363 Speed Sensor is an integral component in modern engine systems, facilitating precise control and monitoring of various engine parameters. This sensor is designed to detect the rotational speed of the engine’s components, providing real-time data that is essential for optimal performance.

Integration with Engine Components

1. Device Communication: The speed sensor interfaces with the engine control unit (ECU) to transmit speed data. This communication allows the ECU to make informed adjustments to fuel injection, ignition timing, and other critical functions.

2. Signal Generating: As the engine operates, the speed sensor generates electrical signals proportional to the rotational speed of the monitored component, such as the crankshaft or turbine. These signals are crucial for the ECU to maintain engine efficiency and responsiveness.

3. Sensor Functionality: The sensor is typically mounted on or near the component it monitors, ensuring accurate and timely data collection. Its placement is strategic to avoid interference from other engine parts and to ensure durability under high-temperature conditions.

4. Speed Monitoring: The primary role of the speed sensor is to monitor the speed of rotating components. This data is used to ensure that the engine operates within safe parameters, preventing over-revving and other potentially damaging conditions.

Conclusion

In summary, the Cummins 4937363 Speed Sensor plays a significant role in enhancing engine performance and reliability by providing accurate speed data to the ECU, enabling precise control over various engine functions. Regular maintenance and proper integration with truck systems are essential to ensure the sensor’s optimal performance and longevity.