3289746
V Ribbed Belt
Cummins®

Introduction

The Cummins 3289746 V-Ribbed Belt is a critical component in commercial trucks, facilitating the transfer of power from the engine to various accessories. Understanding its function and importance is essential for maintaining the efficiency and reliability of truck operations.

Basic Concepts of V-Ribbed Belts

V-Ribbed Belts, characterized by their trapezoidal cross-section, are designed to fit into corresponding grooves on pulleys, enhancing grip and reducing slippage. This design makes them suitable for high-torque applications, driving multiple engine accessories such as alternators, water pumps, and air conditioning compressors ¹. They differ from flat belts and timing belts in construction and application, offering advantages in power transmission and durability ².

Purpose of the 3289746 V-Ribbed Belt

This Cummins part is integral to the operation of a truck’s engine, driving various accessories and ensuring they function correctly. It supports critical systems such as the alternator for electrical power, the water pump for cooling, and the air conditioning compressor for climate control, underscoring its importance in maintaining overall truck performance and reliability ³.

Key Features

The 3289746 V-Ribbed Belt is constructed from high-quality materials, including a robust core and a durable outer layer. Its design incorporates multiple ribs, increasing the contact surface area with pulleys and enhancing grip and efficiency. Unique characteristics such as resistance to heat, chemicals, and wear contribute to its performance and longevity in demanding commercial truck environments ⁴.

Benefits

Using this Cummins part offers several advantages. Its design and material composition contribute to improved efficiency in power transmission, reducing energy loss. The belt’s durability ensures it can withstand the rigors of commercial truck operation, leading to longer service intervals. Reliability is enhanced through its resistance to common failure modes, such as cracking and fraying, ensuring consistent performance over time.

Installation

Installing the 3289746 V-Ribbed Belt requires adherence to specific guidelines to ensure proper function and longevity. It is important to route the belt correctly around all pulleys, ensuring it sits in the grooves without twists or kinks. Tensioning the belt to the manufacturer’s specifications is crucial for optimal performance, as incorrect tension can lead to slippage or premature wear. Following these best practices during installation helps maintain the belt’s efficiency and durability.

Maintenance

Regular maintenance of the 3289746 V-Ribbed Belt is key to ensuring its optimal performance and longevity. Inspection procedures should include checking for signs of wear, such as cracks, fraying, or glazing on the belt’s surface. Tension should be periodically assessed and adjusted as necessary to prevent slippage. Replacement guidelines suggest monitoring the belt’s condition and replacing it before it reaches a critical state of wear to avoid unexpected failures.

Troubleshooting

Common issues with V-Ribbed Belts include slippage, noise, and premature wear. Troubleshooting steps for the 3289746 V-Ribbed Belt involve identifying the symptoms, such as unusual noises or reduced accessory performance, and diagnosing the cause. This may involve checking belt tension, inspecting pulleys for damage, and ensuring proper alignment. Addressing these issues promptly can prevent more significant problems and maintain the belt’s efficiency.

Compatibility with Cummins Engines

The V-Ribbed Belt part number 3289746 is designed to fit a variety of Cummins engines. This belt is crucial for the proper functioning of engine accessories such as the alternator, water pump, and air conditioning compressor. Below is a detailed breakdown of the engines with which this belt is compatible:

ISB Series Engines

• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB/ISD6.7 CM2250

ISBE Series Engines

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

ISC Series Engines

• ISC CM2150
• ISC CM850
• ISC8.3 CM2250

ISL Series Engines

• ISL CM2150
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250

QSB Series Engines

• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB6.7 CM2250
• QSB6.7 CM2350 B105
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

QSC and QSL Series Engines

• QSC8.3 CM850 (CM2850)
• QSL8.9 CM2150 L141

B6 Series Engines

• B6.7 CM2350 B135B
• B6.7 CM2670 B164C

6B and 6C Series Engines

• 6B5.9
• 6C8.3

This belt is engineered to ensure compatibility across these engines, providing reliable performance and durability. It is essential to verify the specific belt dimensions and specifications to ensure a proper fit and optimal performance.

Role of Part 3289746 V-Ribbed Belt in Engine Systems

The V-Ribbed Belt, identified as part 3289746, is integral to the operation of several key components within an engine system. Its primary function is to transfer rotational force from the crankshaft to various auxiliary components, ensuring their efficient operation.

Alternator Drive

The V-Ribbed Belt is responsible for driving the alternator. As the belt rotates, it spins the alternator, which in turn generates electrical power to charge the battery and power the vehicle’s electrical systems. This continuous power supply is essential for maintaining the vehicle’s electrical components, such as lights, ignition systems, and various sensors.

Front Drive Belt

In systems where a front drive belt is utilized, the V-Ribbed Belt plays a similar role. It ensures that the front-mounted accessories, which may include the alternator, power steering pump, and air conditioning compressor, receive the necessary rotational force to function correctly. This setup allows for a more compact and efficient engine bay design, reducing the need for multiple belts and pulleys.

Water Pump Drive

The V-Ribbed Belt also drives the water pump, which is vital for the engine’s cooling system. As the belt rotates, it spins the water pump, circulating coolant through the engine block and radiator. This circulation helps maintain optimal engine temperature, preventing overheating and ensuring the engine operates within safe thermal limits. Effective coolant circulation is essential for the longevity and performance of the engine.

Conclusion

The Cummins 3289746 V-Ribbed Belt is a fundamental component in the engine system, facilitating the operation of the alternator, front drive belt accessories, and the water pump. Its reliable performance ensures that these critical systems function seamlessly, contributing to the overall efficiency and durability of the engine.