3963736
Wire Retaining Clip
Cummins®

The Cummins 3963736 Wire Retaining Clip is a critical component used in commercial trucks. This article provides an in-depth overview of its function, features, and benefits, along with maintenance and troubleshooting suggestions.

Basic Concepts of Wire Retaining Clips

Wire retaining clips are small fasteners designed to hold wires, cables, or hoses in place. They are commonly used in automotive and industrial applications to secure wiring harnesses and prevent chafing or damage to the wires. These clips are typically made from durable materials to withstand vibrations and environmental conditions ¹.

Function and Role in Truck Operation

The 3963736 Wire Retaining Clip by Cummins plays a crucial role in securing electrical wires and cables within the truck’s wiring system. By keeping wires in place, it helps maintain the integrity of the electrical connections, ensuring reliable performance of the truck’s electrical systems. This is particularly important in heavy-duty trucks where vibrations and harsh conditions can otherwise lead to wire displacement or damage ².

Key Features

• Made from high-durability materials to resist corrosion and wear.
• Designed to withstand the vibrations and environmental conditions typical in heavy-duty truck applications.
• Easy to install and remove, allowing for convenient maintenance and repairs.
• Compatible with a variety of wire sizes and types commonly used in commercial trucks.

Benefits

• Enhances the reliability of the truck’s electrical system by securing wires in place.
• Reduces the risk of wire chafing and damage, which can lead to electrical faults.
• Simplifies the installation and maintenance of wiring harnesses.
• Contributes to the overall safety and performance of the truck by ensuring stable electrical connections.

Compatibility with Cummins Engines

The 3963736 Wire Retaining Clip is compatible with a wide range of Cummins engines, including:

ISB Series Engines

• ISB CM2150
• ISB CM850
• ISB/ISD6.7 CM2150 SN
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISBE CM2150
• ISBE4 CM850
• ISL CM2150

ISC Series Engines

• ISC CM2150
• ISC CM850

ISL Series Engines

• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

QSB Series Engines

• QSB5.9 CM850
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117
• QSC8.3 CM2880 C102
• QSC8.3 CM850 (CM2850)

L Series Engines

• L8.9 CM2670 L134C
• L9 CM2670 L128B
• B6.7 CM2670 B164C

Other Cummins Engines

• ISC8.3 CM2250

Role of the 3963736 Wire Retaining Clip in Engine Systems

This part is an essential component in maintaining the integrity and functionality of various wiring systems within engine assemblies. Its primary function is to secure and organize wires, ensuring they remain in place and are protected from potential damage due to vibrations or movement.

Electronic Control Module (ECM) Wiring Harness

In the ECM wiring harness, the 3963736 clip holds wires in position, preventing them from coming loose or rubbing against other components. This is particularly important as the ECM wiring harness carries critical signals and power to the ECM, which manages various engine functions.

Engine Brake (12V) Kit

Within the engine brake system, the clip ensures that the wiring associated with the engine brake is securely fastened. This helps in maintaining the reliability of the engine brake function, which is vital for safe vehicle operation, especially in heavy-duty applications.

General Harness Components

For the engine control wiring harness and injector wiring harness, the 3963736 clip provides necessary support. It helps in reducing the risk of wire fatigue or breakage, which can lead to intermittent electrical issues or complete failure of the associated systems.

Injector Wiring

In the context of the injector wiring, the clip ensures that the wires connecting the injectors to the engine control system are properly secured. This is important for consistent fuel delivery and engine performance.

Rocker Lever Housing and Rocker Lever

In components like the rocker lever housing and rocker lever, the 3963736 clip aids in organizing and securing wires that may run through or near these parts. This is essential for protecting the wires from mechanical damage and ensuring they do not interfere with the movement of the rocker levers.

Troubleshooting and Maintenance

Regular inspection of wire retaining clips is recommended to ensure they remain secure and in good condition. Signs of wear or damage should be addressed promptly to prevent wire displacement. Clips can be replaced relatively easily if necessary, using appropriate tools and following manufacturer guidelines.

Conclusion

The Cummins 3963736 Wire Retaining Clip is a small yet vital component that contributes to the reliability and performance of engine systems by ensuring that wiring remains secure and undamaged. Its compatibility with a wide range of Cummins engines and its role in various wiring systems make it an indispensable part of commercial truck maintenance and operation.