3974247
V Ribbed Belt
Cummins®

Introduction

The Cummins 3974247 V Ribbed Belt is a critical component for commercial trucks, facilitating power transfer from the engine to auxiliary components. This belt ensures the efficiency and performance of the truck’s engine system.

Basic Concepts of V Ribbed Belts

V Ribbed Belts feature a trapezoidal cross-section that fits snugly into corresponding pulleys, enhancing grip and reducing slippage for efficient power transmission ¹. In a truck’s engine system, these belts drive components such as the alternator, water pump, and air conditioning compressor.

Role of the 3974247 V Ribbed Belt in Truck Operation

The Cummins 3974247 V Ribbed Belt drives essential components within the engine system, ensuring the alternator generates electricity, the water pump circulates coolant, and the air conditioning compressor operates. This efficient operation is vital for maintaining engine efficiency and overall vehicle performance ².

Key Features of the 3974247 V Ribbed Belt

This Cummins part is constructed from high-quality materials, featuring multiple ribs that increase the surface area in contact with the pulleys, improving grip and reducing slippage. It is engineered to withstand high temperatures and stresses, ensuring reliable operation under demanding conditions ³.

Benefits of Using the 3974247 V Ribbed Belt

Utilizing this V Ribbed Belt contributes to improved engine performance by ensuring auxiliary components receive consistent power. Its durable construction and design enhance longevity, reducing replacement frequency. Efficient power transmission capabilities contribute to the overall efficiency of the truck’s engine system ⁴.

Troubleshooting Common Issues with V Ribbed Belts

Common issues with V Ribbed Belts include slippage, wear, and noise. Slippage can occur if the belt is not properly tensioned or if it has become glazed due to excessive heat. Wear may manifest as cracks or fraying along the belt’s edges, indicating it is nearing the end of its service life. Noise, such as squealing, can be a sign of misalignment or contamination on the belt’s surface. Regular inspection and maintenance can help identify and address these issues promptly.

Maintenance Tips for V Ribbed Belts

To ensure optimal performance and longevity of V Ribbed Belts, regular maintenance is recommended. This includes periodic inspection for signs of wear, proper tension adjustment to prevent slippage, and cleaning the belt and pulleys to remove any contaminants. Replacement guidelines should be followed to ensure the belt is changed before it fails, maintaining the efficiency and reliability of the truck’s engine system.

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 is committed to quality and innovation in the automotive industry. The company’s product range includes engines, powertrains, and related components, all designed to meet the demanding requirements of commercial and industrial applications. Cummins’ dedication to excellence is evident in its rigorous testing and quality control processes, ensuring that its products deliver reliable performance and durability.

Cummins V Ribbed Belt 3974247 Compatibility

The Cummins V Ribbed Belt part number 3974247 is designed to fit a range of Cummins engines, ensuring optimal performance and longevity. This belt provides reliable power transmission across various engine models.

Compatible Engines

The V Ribbed Belt 3974247 is compatible with the following Cummins engines:

• B5.9 GAS PLUS CM556
• F3.8 CM2620 F137B
• F4.5 CM2620 F139B
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118
• ISC CM2150
• ISC CM850
• ISC8.3 CM2250
• ISF3.8 CM2220 AN
• ISL CM2150
• ISL9 CM2150 SN
• ISL9 CM2250
• QSB6.7 CM2250
• QSB6.7 CM2350 B105
• QSL9 CM2250
• QSL9 CM2350 L102

Grouping of Compatible Engines

For ease of reference, the compatible engines can be grouped based on their model series:

• F Series Engines:

  • F3.8 CM2620 F137B
  • F4.5 CM2620 F139B

• ISB Series Engines:

  • ISB6.7 CM2250
  • ISB6.7 CM2350 B101
  • ISB6.7 G CM2180 B118

• ISC Series Engines:

  • ISC CM2150
  • ISC CM850
  • ISC8.3 CM2250

• ISF Series Engines:

  • ISF3.8 CM2220 AN

• ISL Series Engines:

  • ISL CM2150
  • ISL9 CM2150 SN
  • ISL9 CM2250

• QSB Series Engines:

  • QSB6.7 CM2250
  • QSB6.7 CM2350 B105

• QSL Series Engines:

  • QSL9 CM2250
  • QSL9 CM2350 L102

• Other Engines:

  • B5.9 GAS PLUS CM556

This comprehensive compatibility ensures that the V Ribbed Belt 3974247 can be used across a wide range of Cummins engines, providing a reliable solution for maintaining engine performance.

Role of Part 3974247 V Ribbed Belt in Engine Systems

The V Ribbed Belt, identified by part number 3974247, is integral to the efficient operation of various engine systems. This belt transmits power from the engine’s crankshaft to multiple auxiliary components, ensuring they function correctly.

Power Transmission to Auxiliary Components

1. Alternator Drive: The V Ribbed Belt connects to the alternator, which is essential for generating electrical power to charge the battery and power the vehicle’s electrical systems. Consistent and reliable power transmission ensures the alternator operates efficiently, maintaining the vehicle’s electrical supply.

2. Water Pump Drive: The belt also drives the water pump, which circulates coolant through the engine to manage its temperature. Effective coolant circulation prevents overheating, ensuring the engine maintains optimal performance and longevity.

3. Front Drive: In systems where a front-mounted accessory drive is present, the V Ribbed Belt facilitates the operation of this drive. This can include components such as the power steering pump or air conditioning compressor, both of which rely on consistent belt-driven power for proper function.

Integration with Engine Systems

The V Ribbed Belt’s design allows it to engage multiple pulleys simultaneously, driving several engine components with a single belt. This multi-rib configuration enhances durability and efficiency, reducing the likelihood of belt slippage and increasing the overall reliability of the engine’s auxiliary systems.

Conclusion

In summary, the Cummins 3974247 V Ribbed Belt plays a significant role in the coordinated operation of the alternator, water pump, and front drive systems, ensuring these components receive the necessary power to function correctly within the engine system. Regular maintenance and proper installation are essential to maximize the performance and longevity of this critical component.