3939580
V Ribbed Belt
Cummins®

The Cummins V Ribbed Belt, part number 3939580, is a component designed for use in commercial trucks. It plays a significant role in the operation of these vehicles by facilitating the transfer of power from the engine to various accessories. Understanding its purpose and functionality is key to maintaining the efficiency and reliability of truck operations.

Basic Concepts of V Ribbed Belts

V Ribbed Belts are a type of drive belt characterized by their trapezoidal cross-section, which allows them to fit into corresponding grooves on pulleys. This design enhances grip and reduces slippage, making them suitable for automotive applications where reliable power transmission is required ¹. V Ribbed Belts are constructed from multiple layers of rubber and fabric, providing durability and flexibility. The belts are designed to withstand the high tension and dynamic loads encountered in engine compartments.

Role of the 3939580 V Ribbed Belt in Truck Operation

This Cummins part plays a role in the operation of a truck by driving various engine accessories such as the alternator, water pump, power steering pump, and air conditioning compressor. It ensures these components receive the necessary power to function, which is vital for the truck’s overall performance and the comfort of its occupants.

Key Features of the 3939580 V Ribbed Belt

The 3939580 V Ribbed Belt is distinguished by its material composition, which includes high-quality rubber and fabric layers that provide durability and resistance to wear. Design enhancements such as optimized rib profiles and advanced construction techniques contribute to its performance. These features ensure the belt can handle the demanding conditions within a truck’s engine compartment ².

Benefits of Using the 3939580 V Ribbed Belt

Using this part offers several benefits, including improved efficiency in power transmission, enhanced durability under high stress, and consistent performance in various operating conditions. These attributes contribute to the overall reliability and efficiency of commercial truck applications.

Installation and Compatibility

Proper installation of the 3939580 V Ribbed Belt is important to ensure it functions correctly. This involves following specific guidelines to achieve the correct tension and alignment with the pulleys. Compatibility with various truck models and engine types should be considered to ensure the belt meets the specific requirements of the application ³.

Maintenance and Troubleshooting

Maintaining the 3939580 V Ribbed Belt is important for ensuring optimal performance and longevity. Regular inspections for signs of wear, proper tensioning, and addressing any issues promptly can prevent failures. Common troubleshooting techniques for problems such as belt slippage, wear, or failure involve checking alignment, tension, and the condition of the pulleys.

Cummins: A Brief Overview

Cummins Inc. is a well-established manufacturer known for its high-quality automotive components. With a history of innovation and commitment to excellence, Cummins produces a range of parts designed to meet the demanding requirements of commercial vehicles. The 3939580 V Ribbed Belt is a testament to Cummins’ dedication to providing reliable and efficient solutions for the automotive industry.

V Ribbed Belt 3939580 Compatibility with Cummins Engines

The V Ribbed Belt part number 3939580, manufactured by Cummins, is designed to fit a variety of Cummins engines. This belt is essential for the proper functioning of the engine’s ancillary systems, ensuring that components such as the alternator, water pump, and air conditioning compressor operate efficiently.

Compatible Engines

• 4B3.9
• 6B5.9
• 6C8.3
• B5.9 CM2670 B166C
• B5.9 G
• B5.9 GAS PLUS CM556
• G8.3
• ISB CM2150
• ISB CM550
• ISB CM850
• ISB5.9G CM2180
• ISC CM554
• ISC CM850
• ISL CM554
• ISL G CM2180
• ISL9 CM2150 SN
• L GAS PLUS CM556
• QSB3.9 CM2880 B138
• QSB5.9 44 CM550
• QSB5.9 CM2880 B139
• QSB5.9 CM550

Grouping of Compatible Engines

The engines listed can be grouped based on their series and specifications:

• 4B3.9, 6B5.9, 6C8.3, G8.3: These engines are part of the earlier Cummins lineup, known for their robust design and reliability.
• B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556: These engines are part of the B series, which includes both gas and diesel variants.
• ISB CM2150, ISB CM550, ISB CM850, ISB5.9G CM2180, ISC CM554, ISC CM850, ISL CM554, ISL G CM2180, ISL9 CM2150 SN: These engines are part of the ISB, ISC, and ISL series, which are known for their versatility and performance across various applications.
• L GAS PLUS CM556, QSB3.9 CM2880 B138, QSB5.9 44 CM550, QSB5.9 CM2880 B139, QSB5.9 CM550: These engines are part of the QSB series, which includes both gas and diesel engines designed for heavy-duty applications.

The V Ribbed Belt 3939580 is engineered to meet the specific requirements of these engines, ensuring a secure fit and reliable performance.

Role of Part 3939580 V Ribbed Belt in Engine Systems

The V Ribbed Belt, identified by part number 3939580, is an essential component in the efficient operation of various engine systems. It serves as the primary means of transferring rotational force from the engine’s crankshaft to multiple auxiliary components, ensuring their synchronized operation.

Integration with Alternator Systems

In alternator drive configurations, the V Ribbed Belt connects the crankshaft to the alternator. This connection allows the alternator to generate electrical power as the engine runs, charging the battery and powering the vehicle’s electrical systems. When part of an alternator drive kit, the belt ensures a secure and efficient transfer of power, minimizing slippage and maximizing alternator efficiency.

Water Pump Operation

The V Ribbed Belt also plays a significant role in the cooling system of an engine. By driving the water pump, it circulates coolant through the engine block and radiator, maintaining optimal operating temperatures. The belt engages with the water pump drive pulley, ensuring consistent coolant flow, which is vital for preventing engine overheating.

Marine Applications

In marine environments, the V Ribbed Belt is often included in marine spare parts kits or marine spares kits. Its role extends to powering various systems on a boat, including the alternator and water pump, similar to its function in automotive engines. The robust design of the belt is tailored to withstand the harsh marine environment, ensuring reliable performance even under demanding conditions.

Additional Drive Applications

Beyond the alternator and water pump, the V Ribbed Belt may also be utilized in other drive applications within an engine system. This includes driving auxiliary components such as air conditioning compressors, power steering pumps, and other systems that require a consistent and reliable source of rotational power from the engine.

Conclusion

In summary, the 3939580 V Ribbed Belt is integral to the operation of multiple engine systems, facilitating the efficient transfer of power from the crankshaft to essential components like the alternator and water pump. Its application extends to marine environments, where it plays a similarly vital role in powering critical systems aboard vessels.