4940003
V Ribbed Belt
Cummins®

The 4940003 V Ribbed Belt, manufactured by Cummins, is a component designed for use in commercial trucks. Cummins, a well-established name in the automotive industry, produces this belt to meet the demanding requirements of heavy-duty applications. V Ribbed Belts are integral to the automotive industry, facilitating efficient power transmission within engine systems.

Basic Concepts of V Ribbed Belts

V Ribbed Belts are characterized by their ribbed design, which distinguishes them from flat or timing belts. This ribbed structure allows for greater contact surface area with the pulleys, enhancing power transmission efficiency. The construction typically involves multiple layers, including a robust core and durable outer ribs, which contribute to the belt’s overall performance and longevity ¹.

Function and Operation

This Cummins part operates by transmitting power from the engine’s crankshaft to various auxiliary components. These components include the alternator, water pump, and air conditioning compressor. The belt’s design ensures that it maintains a firm grip on the pulleys, allowing for smooth and consistent operation of these critical systems.

Key Features of the 4940003 V Ribbed Belt

The 4940003 V Ribbed Belt is engineered with specific design and material characteristics to enhance its performance. Features such as durability, flexibility, and resistance to wear and environmental factors are integral to its construction. The belt is made from high-quality materials that can withstand the rigors of commercial truck operation, ensuring reliable performance over time ².

Benefits of Using the 4940003 V Ribbed Belt

Utilizing the 4940003 V Ribbed Belt in commercial trucks offers several advantages. These include improved efficiency in power transmission, reduced maintenance requirements due to its durable construction, and enhanced overall performance of the engine system. The belt’s design contributes to smoother operation and greater reliability under various operating conditions.

Installation and Compatibility

Proper installation of the 4940003 V Ribbed Belt is vital to ensure optimal performance and longevity. Guidelines for installation include careful routing of the belt to avoid excessive bending or twisting, and ensuring it is properly tensioned. Compatibility with various truck models and engine types should be verified to ensure the belt meets the specific requirements of the application.

Maintenance and Troubleshooting

Regular maintenance practices are recommended to ensure the longevity and performance of the 4940003 V Ribbed Belt. This includes periodic inspections for signs of wear, proper tensioning, and cleaning to remove any contaminants that could affect performance. Common issues such as slippage or cracking can often be identified through routine checks, allowing for timely resolution.

Performance in Various Conditions

The 4940003 V Ribbed Belt is designed to perform under a range of operating conditions. This includes extreme temperatures, high loads, and varying speeds. Its construction allows it to maintain efficiency and reliability, even when subjected to the demanding environments typical of commercial truck operations.

Cummins: A Brief Overview

Cummins Inc. is a leading manufacturer of diesel engines and related components, with a strong reputation for quality and innovation in the automotive industry. The company’s commitment to excellence is evident in its product line, which includes the 4940003 V Ribbed Belt. Cummins’ focus on research and development ensures that its products meet the evolving needs of the market, providing reliable and efficient solutions for commercial vehicle operators ³.

Cummins V Ribbed Belt 4940003 Compatibility

The Cummins V Ribbed Belt part number 4940003 is designed to fit a variety of Cummins engines, ensuring smooth and reliable operation of engine accessories. Below is a detailed breakdown of the engines that this belt is compatible with:

B6.7 Series

• B6.7 CM2350
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 G CM2180 B118
• QSB6.7 CM2250
• QSB6.7 CM2350 B105

B135 Series

• B135B

ISB Series

• ISB CM2150

ISBE Series

• ISBE CM2150
• ISBE4 CM850

ISC and ISL Series

• ISC CM2150
• ISL CM2150

QSF Series

• QSF3.8 CM2880 F112

This belt is engineered to provide optimal performance and durability, ensuring that the engine accessories such as the alternator, water pump, and air conditioning compressor operate efficiently. The belt’s design allows it to withstand the high stresses and varying conditions found in these engines, contributing to the overall reliability and longevity of the engine systems.

Role of Part 4940003 V Ribbed Belt in Engine Systems

The V Ribbed Belt, identified by part number 4940003, is integral to the efficient operation of several engine components. It serves as the primary means of transferring rotational force from the engine’s crankshaft to auxiliary components, ensuring they function in harmony with the engine’s operation.

Drive Mechanism

The V Ribbed Belt is looped around the crankshaft pulley and various other pulleys connected to auxiliary components. This arrangement allows the crankshaft’s rotational energy to be transmitted to these components via the belt. The ribbed design of the belt enhances grip and reduces slippage, ensuring a consistent transfer of power.

Water Pump Operation

A key component driven by the V Ribbed Belt is the water pump. The belt engages with the water pump’s pulley, causing the pump to rotate. This rotation facilitates the circulation of coolant through the engine’s passages, maintaining optimal operating temperatures and preventing overheating.

Water Pump Drive Integration

The water pump drive system relies on the V Ribbed Belt to operate effectively. The belt’s connection to the water pump pulley ensures that as the engine runs, the water pump is consistently driven, allowing for uninterrupted coolant flow. This integration is essential for the thermal management of the engine, safeguarding its longevity and performance.

Conclusion

In summary, the V Ribbed Belt (part 4940003) plays a significant role in the drive mechanism of the engine, particularly in powering the water pump and ensuring efficient coolant circulation. Its design and function are tailored to support the dynamic needs of modern engine systems, contributing to their overall reliability and efficiency.