3924347
Oil Gauge Tube
Cummins®

Introduction

The Cummins 3924347 Speed Sensor is a component designed for use in commercial trucks. It serves to monitor and report the rotational speed of specific parts within the vehicle, such as wheels or the transmission output shaft. This data is vital for the proper operation of various truck systems, including the engine control unit (ECU) and transmission, ensuring that the vehicle operates efficiently and safely ².

Basic Concepts of Speed Sensors

A speed sensor is an electronic device that measures the rate of rotation of a particular component. It typically operates using principles of electromagnetism, where a magnetic field is generated by a rotating ferrous metal component passing by a stationary sensor. This interaction induces a voltage in the sensor, which is then converted into a signal that can be interpreted by the vehicle’s electronic systems. Speed sensors play a role in various vehicle systems by providing data that is used for functions such as anti-lock braking systems (ABS), traction control, and transmission shifting ¹.

Purpose of the Cummins 3924347 Speed Sensor

The Cummins 3924347 Speed Sensor is specifically designed to monitor the rotational speed of the transmission output shaft in commercial trucks. It plays a role in the vehicle’s operation by providing the ECU with accurate speed data, which is used to make adjustments to the engine and transmission for optimal performance. This sensor ensures that the transmission shifts at the appropriate times and that the engine operates within its designed parameters, contributing to both efficiency and safety ².

Key Features

The Cummins 3924347 Speed Sensor is constructed with high-quality materials to ensure durability and reliability in the demanding environment of commercial trucking. Its design includes a robust housing to protect the sensitive electronic components inside. The sensor is engineered to provide precise speed measurements, which are crucial for the accurate operation of the truck’s systems. Additionally, it is designed for easy installation and integration into existing truck systems, minimizing downtime during maintenance or replacement ².

Benefits

The Cummins 3924347 Speed Sensor offers several advantages. By providing accurate speed data, it contributes to improved fuel efficiency as the ECU can make more informed decisions about engine and transmission operation. Enhanced vehicle performance is another benefit, as the sensor ensures that the transmission shifts smoothly and at the optimal times. Safety is also increased, as accurate speed data is critical for the proper function of systems like ABS and traction control, which rely on this information to operate effectively ².

Installation and Integration

Installing the Cummins 3924347 Speed Sensor involves securing it in the appropriate location on the transmission and connecting it to the vehicle’s electronic system. It is important to follow the manufacturer’s guidelines to ensure proper installation and integration. This may include specific torque settings for the sensor’s mounting bolts and ensuring that all electrical connections are secure and correctly routed to avoid damage from heat or moving parts ².

Troubleshooting and Maintenance

Common issues with the Cummins 3924347 Speed Sensor may include inaccurate speed readings or complete sensor failure. Diagnostic procedures typically involve using a scan tool to read fault codes stored in the ECU, which can point to issues with the sensor or its wiring. Regular maintenance practices, such as inspecting the sensor and its connections for signs of wear or damage, can help ensure optimal performance and longevity. In cases where the sensor is found to be faulty, replacement is usually straightforward, provided that the new sensor is correctly installed and integrated into the vehicle’s system ².

Cummins Company 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 innovation in the automotive and heavy-duty truck industries. The company’s expertise in manufacturing automotive components, including speed sensors, is demonstrated by its commitment to producing reliable, high-performance parts that meet the demanding requirements of commercial trucking applications ².

Cummins Speed Sensor 3924347 Compatibility

The Cummins Speed Sensor part number 3924347 is designed to be compatible with a variety of Cummins engine models. This sensor plays a role in the engine’s electronic control unit (ECU) by providing real-time data on the engine’s rotational speed, which is essential for optimal performance and fuel efficiency ².

Compatible Engines

• 6B5.9 Series
  • 6B5.9
• B6.7 Series
  • B6.7 CM2350 B135B
  • B6.7 CM2670 B153B
  • B6.7 CM2250
  • B6.7 CM2350 B101
• ISB Series
  • ISB CM550
  • ISB/ISD4.5 CM2150 B119
  • ISB6.7 CM2250
  • ISB6.7 CM2350 B101
• ISBE Series
  • ISBE CM800
• QSB Series
  • QSB4.5 CM2250 EC
  • QSB4.5 CM850 (CM2850)
  • QSB5.9 30 CM550
  • QSB5.9 44 CM550
  • QSB5.9 CM550
  • QSB6.7 CM2250
  • QSB6.7 CM2350 B105
  • QSB6.7 CM850 (CM2850)
  • QSB7 CM2880 B117

Grouping of Compatible Engines

The Cummins Speed Sensor 3924347 is engineered to fit seamlessly into the following groups of engines:

• 6B5.9 and B6.7 Series: These engines, including the B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2250, and B6.7 CM2350 B101, benefit from the sensor’s precise speed data, ensuring smooth operation and enhanced performance.

• ISB Series: The ISB CM550, ISB/ISD4.5 CM2150 B119, ISB6.7 CM2250, and ISB6.7 CM2350 B101 engines are designed to work optimally with this speed sensor, providing reliable data for the ECU to manage engine functions effectively.

• ISBE Series: The ISBE CM800 engine is another model that is compatible with the 3924347 speed sensor, ensuring that the ECU receives accurate speed information for optimal engine control.

• QSB Series: This series includes a wide range of engines such as the QSB4.5 CM2250 EC, QSB4.5 CM850 (CM2850), QSB5.9 30 CM550, QSB5.9 44 CM550, QSB5.9 CM550, QSB6.7 CM2250, QSB6.7 CM2350 B105, QSB6.7 CM850 (CM2850), and QSB7 CM2880 B117. Each of these engines relies on the speed sensor to provide essential data for the ECU, ensuring efficient and reliable engine performance.

This compatibility ensures that the Cummins Speed Sensor 3924347 can be used across a wide range of engine models, providing a reliable and consistent performance across different applications ².

Role of Part 3924347 Speed Sensor in Engine Systems

The Part 3924347 Speed Sensor is integral to the efficient operation of various engine systems. It provides essential data that contributes to the overall performance and monitoring of the engine ².

Integration with Gauge Systems

When integrated with gauge systems, the speed sensor offers real-time data on the engine’s rotational speed. This information is vital for the accurate display on the gauge, allowing engineers and mechanics to monitor the engine’s performance continuously. The gauge can then provide immediate feedback on any anomalies or changes in engine speed, facilitating prompt diagnosis and maintenance ².

Contribution to Oil Level Monitoring

In oil level systems, the speed sensor plays a supportive role by ensuring that the oil pump operates efficiently. The sensor’s data on engine speed helps in maintaining the optimal flow rate of oil, which is crucial for lubrication and cooling. This, in turn, contributes to the accuracy of the oil level gauge, ensuring that the oil level readings are reliable and reflective of the actual conditions within the engine ².

Enhancing Oil Level Gauge Accuracy

The speed sensor’s precise measurements of engine speed are instrumental in enhancing the accuracy of the oil level gauge. By providing consistent and reliable speed data, the sensor ensures that the oil level gauge can make accurate assessments of the oil volume. This integration helps in preventing both overfilling and underfilling of oil, which can lead to engine damage or inefficient operation ².

Conclusion

The Cummins 3924347 Speed Sensor is a critical component in the operation of commercial trucks, providing essential data for the efficient and safe operation of the vehicle’s systems. Its compatibility with a wide range of Cummins engines, coupled with its robust design and precise measurements, makes it a valuable asset for maintaining optimal engine performance and fuel efficiency ².