Gates K081377HD Serpentine Belt

Heavy-Duty Belt for Fleet Service

The Gates FleetRunner Heavy Duty Micro-V Belt K081377HD is a heavy-duty serpentine belt built for demanding accessory drive systems. It uses EPDM construction with a distinct green overcord for added durability, flexibility, and stability in fleet applications.

Compatible With 1999-2003 Ford F-250 Super Duty and 1999-2003 Ford F-350 Super Duty equipped with ambulance prep package and dual alternators, this belt is sized for the accessory drive requirements of those configurations. The K081377HD part number is also a useful reference when cross-checking replacement options for the same application.

Key Features

• Gates FleetRunner Heavy Duty Micro-V Belt line for fleet and commercial use
• EPDM belt material for improved wear resistance and longer service life
• Polyester cord reinforcement for strength and dimensional stability
• 8-rib, K-section automotive V-ribbed belt design
• OE Improved comparison rating
• Effective length: 137.72 in. / 3498 mm
• Outside circumference: 138.29 in. / 3513 mm
• Top width: 1.087 in. / 28 mm

Product Details

Gates engineered the FleetRunner Heavy Duty Micro-V Belt line to handle the higher load demands common in fleet vehicles. The EPDM construction and green overcord help the belt maintain flexibility and stability under heavy-duty operating conditions, while the 8-rib profile supports consistent grip across the accessory drive. For buyers searching for a Ford F-250 Super Duty serpentine belt or Ford F-350 Super Duty serpentine belt, K081377HD provides a direct fit reference for the listed ambulance prep and dual alternator applications.

This part cross-references Dayco 5081373 for the same application.

What It Helps Address

• Belt noise from wear, glazing, or loss of grip
• Cracking or fraying on an aging accessory drive belt
• Charging and accessory drive issues on dual alternator setups
• Downtime caused by belt replacement intervals in fleet service
• Fitment concerns when replacing the original heavy-duty Micro-V belt

Installation Notes

Verify the belt routing and compare the effective length, outside circumference, rib count, and section before installation. Confirm the vehicle is a 1999-2003 Ford F-250 Super Duty or 1999-2003 Ford F-350 Super Duty with ambulance prep package and dual alternators. Inspect pulleys, tensioner condition, and accessory alignment before fitting the new belt.

Quality Assurance

Gates FleetRunner belts are built for heavy-duty drive systems and use EPDM construction with polyester cord reinforcement for durability and stable operation in fleet service. K081377HD is an OE Improved replacement reference for the listed applications.