Dayco 5080868 Serpentine Belt

Dayco 5080868 Serpentine Belt Overview

The Dayco 5080868 serpentine belt is a K-section accessory drive belt built for demanding engine accessory systems. It uses EPDM with aramid reinforcement for stable performance, consistent rib tracking, and durability across a wide temperature range.

Compatible With heavy-duty truck and equipment applications that use an 8-rib, K-section belt profile, including Freightliner, Cummins, John Deere, and Navistar platforms where this size is specified.

Key Features

• Dayco serpentine belt, part number 5080868
• EPDM construction with aramid reinforcement for strength and wear resistance
• 8-rib, straight-rib design for accessory drive engagement
• K-section profile with 1.10 in top width
• Effective length: 86.75 in; outside circumference: 87.31 in
• Operating temperature range: -45°F to 212°F
• Built to SAE J1459 and SAE J2432 standards

Detailed Description

Dayco 5080868 is a black serpentine belt engineered for accessory drive systems that require an 8-rib K-section belt. The EPDM rubber compound helps maintain flexibility and wear characteristics, while aramid reinforcement adds tensile support for consistent belt tracking under load. This makes it a practical choice for commercial and industrial engines that rely on stable drive performance for alternators, water pumps, air conditioning compressors, and other belt-driven accessories. If you are sourcing a replacement serpentine belt for Freightliner, Cummins, or John Deere equipment, verify the belt dimensions and rib count against the original application before ordering.

This part cross-references ACDelco K080868HD for the same application.

What It Helps Address

• Squealing or slipping from a worn accessory drive belt
• Cracking, glazing, or rib wear on the existing serpentine belt
• Loss of accessory drive consistency under engine load
• Incorrect belt length or rib count during replacement service
• Premature belt deterioration from temperature extremes

Installation Notes and Tips

Confirm the belt path, rib count, and effective length before installation. Inspect pulleys, tensioners, and idlers for wear or misalignment, since damaged components can shorten belt life and affect tracking. Use the vehicle service information for the correct routing procedure and tensioner release method. For fitment-based searches, this Dayco 5080868 serpentine belt is commonly referenced for Freightliner, Cummins, John Deere, and Navistar applications that specify an 8-rib K-section belt.

Quality Assurance

This belt is manufactured to SAE J1459 and SAE J2432 standards, supporting consistent dimensional and performance requirements for accessory drive service.