Dayco 24405 Accessory Drive Belt - Alternator or Fan and Generator

Accessory Drive Belt for Reliable Belt Drive Performance

The Dayco 24405 accessory drive belt is built for accessory drive systems that need consistent grip, stable tracking, and dependable operation across a wide temperature range. With a double-cog construction and synthetic rubber compound, this black belt is made for applications that call for a 0.75-inch top width and a 38-degree angle.

Compatible With Cummins, Massey Ferguson, Mopar, and other cross-reference applications, this belt is a direct replacement option for service work on belt-driven engine accessories. The Dayco 24405 is also a practical choice when searching for an accessory drive belt for Cummins engine applications or a replacement belt for Mopar and NAPA cross-reference numbers.

Key Features

• Part number: Dayco 24405
• Accessory drive belt for engine accessory systems
• Synthetic rubber compound construction
• Double-cog belt design for flexible operation
• 0.75-inch top width
• Effective length: 40.50 in. / 1028.70 mm
• Outside circumference: 41.14 in. / 1044.96 mm
• Black finish
• Operating temperature range: -35°F to 175°F
• Built to SAE J636 and SAE J637 standards

Product Details

The Dayco 24405 accessory drive belt is engineered for belt drive systems that require a specific length, width, and angle profile. Its double-cog construction supports flexibility in routing, while the synthetic rubber compound is selected for service in demanding underhood conditions. This belt measures 40.50 inches effective length and 41.14 inches outside circumference, making it important to verify dimensions against the original belt specification before ordering.

This part cross-references Cummins (e.g., 139657, 178634) for the same application. It also cross-references Mopar and NAPA numbers in related service applications. For buyers searching by vehicle keywords, this Dayco 24405 belt is commonly considered in Cummins engine service, Massey Ferguson equipment maintenance, and Mopar-related accessory drive belt replacement searches.

Common Issues This Belt Can Address

• Cracked, glazed, or worn accessory drive belt surfaces
• Squealing or slipping belt operation
• Incorrect belt length after a previous replacement
• Loss of accessory drive performance from belt wear
• Noise caused by a belt that no longer tracks correctly

Installation Notes and Tips

Confirm the required belt length, top width, and angle before installation. Compare the old belt and pulley routing to the Dayco 24405 specifications, especially on Cummins, Massey Ferguson, and Mopar applications where multiple belt options may exist. Inspect pulleys, tensioners, and idlers for wear before installing the new belt, and verify proper tension after startup.

Quality Assurance

Dayco manufactures belts to SAE J636 and SAE J637 standards, supporting consistent dimensional and performance requirements for accessory drive service. The 24405 is specified for operation from -35°F to 175°F, giving it a defined service range for automotive and equipment belt drive applications.