3925207
Belt Tensioner Bracket
Cummins®

This article provides an overview of the Belt Tensioner Bracket, part #3925207, manufactured by Cummins. It covers the basic concepts, purpose, key features, benefits, and maintenance suggestions related to this component.

Basic Concepts

A Belt Tensioner Bracket is a component used in the belt drive system of a truck’s engine. It supports the belt tensioner, which maintains the correct tension on the drive belts. Proper tension ensures efficient power transmission and reduces wear on the belts and associated components ¹.

Purpose of the Belt Tensioner Bracket

The Belt Tensioner Bracket, part #3925207, plays a role in the operation of a truck by providing a stable mounting point for the belt tensioner. This ensures that the drive belts remain properly tensioned, which is important for the efficient operation of engine accessories such as the alternator, water pump, and air conditioning compressor ².

Key Features

• Designed for durability and long-term performance.
• Precision-engineered to meet Cummins’ quality standards.
• Compatible with specific Cummins engine models.
• Constructed from high-strength materials to withstand the rigors of heavy-duty applications ³.

Benefits

• Ensures consistent belt tension, which enhances the reliability and performance of engine accessories.
• Reduces the risk of belt slippage and associated damage.
• Contributes to the overall efficiency and longevity of the engine’s belt drive system.

Troubleshooting and Maintenance

Regular inspection of the Belt Tensioner Bracket is recommended to ensure it remains in good condition. Signs of wear or damage should be addressed promptly to prevent belt tension issues. Maintenance procedures may include checking for proper alignment, securing mounting bolts, and ensuring the tensioner operates smoothly.

Compatibility of Belt Tensioner Bracket Part 3925207 with Cummins Engines

The Belt Tensioner Bracket part number 3925207, manufactured by Cummins, is designed to fit a variety of Cummins engines. This bracket is a component in maintaining the proper tension of the engine’s serpentine belt, ensuring efficient operation and longevity of the belt and related components.

Compatible Engines

• 4B3.9
• 6B5.9
• B5.6 CM2670 B152B
• B5.9 G
• B5.9 GAS PLUS CM556
• G5.9
• ISB CM550
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB5.9G CM2180
• QSB5.9 44 CM550
• QSB5.9 CM2880 B115
• QSB5.9 CM2880 B139
• QSB5.9G

Grouping of Compatible Engines

The compatibility of the Belt Tensioner Bracket part number 3925207 spans across several engine families and configurations. Here is a breakdown of the compatible engines grouped by their model series:

• B5 Series:

  • B5.6 CM2670 B152B
  • B5.9 G
  • B5.9 GAS PLUS CM556

• ISB Series:

  • ISB CM550
  • ISB5.9 CM2880 B110
  • ISB5.9 CM2880 B140
  • ISB5.9 CM2880 B149
  • ISB5.9G CM2180

• QSB Series:

  • QSB5.9 44 CM550
  • QSB5.9 CM2880 B115
  • QSB5.9 CM2880 B139
  • QSB5.9G

• Other Models:

  • 4B3.9
  • 6B5.9
  • G5.9

This comprehensive compatibility ensures that the Belt Tensioner Bracket part number 3925207 can be used across a wide range of Cummins engines, providing a reliable solution for maintaining belt tension.

Role of Part 3925207 Belt Tensioner Bracket in Engine Systems

The Belt Tensioner Bracket (Part 3925207) is an integral component in maintaining the proper function and efficiency of various engine-driven accessories. It serves as a mounting point for the belt tensioner, which is responsible for keeping the drive belt at the correct tension. This ensures that components such as the alternator, water pump, and other pulley-driven systems operate smoothly and efficiently.

Interaction with Key Components

1. Alternator Drive: The Belt Tensioner Bracket helps maintain the necessary tension on the drive belt that connects to the alternator. Proper tension ensures the alternator receives consistent power to charge the battery and supply electricity to the vehicle’s electrical systems.

2. Water Pump Drive: Similarly, the bracket supports the tensioner that keeps the belt taut on the water pump drive. This is essential for the water pump to circulate coolant effectively, maintaining optimal engine temperature and preventing overheating.

3. Tensioner and Belt: The tensioner, mounted on the Belt Tensioner Bracket, applies the correct amount of pressure to the belt. This prevents slippage and ensures that the belt drives all connected pulleys efficiently.

4. Water Pump Drive Pulley: The bracket’s role extends to ensuring that the water pump drive pulley operates under the right tension. This is vital for the consistent operation of the water pump, which relies on a steady drive to function correctly.

5. Other Pulleys: Beyond the alternator and water pump, the Belt Tensioner Bracket also contributes to the efficient operation of other pulley-driven systems, such as the power steering pump or air conditioning compressor, by maintaining belt tension across all pulleys.

In summary, the Belt Tensioner Bracket (Part 3925207) plays a significant role in the coordinated function of engine-driven accessories by ensuring that the drive belt remains properly tensioned across all pulleys. This facilitates the smooth and reliable operation of critical engine components.

Conclusion

The Belt Tensioner Bracket, part #3925207, is a critical component in the belt drive system of Cummins engines. It ensures that the drive belts remain properly tensioned, which is essential for the efficient operation of engine accessories. Regular maintenance and inspection of this part are recommended to ensure optimal performance and longevity of the engine’s belt drive system.