Gates K120876HD Serpentine Belt

Reliable Heavy Duty Serpentine Belt for Automotive Applications

The Gates FleetRunner Heavy Duty Micro-V Belt K120876HD is engineered to deliver consistent performance in demanding automotive environments. Designed with durable materials and precise dimensions, this serpentine belt supports accessory drive systems in various vehicle makes and models requiring a heavy duty solution.

• Top width: 1.647 inches (42 mm)
• Effective length: 87.6 inches (2225 mm)
• Outside circumference: 88.13 inches (2239 mm)
• 12 rib automotive v-ribbed belt design
• Belt material: EPDM for enhanced durability
• Cord material: Polyester for strength and flexibility
• Cross section designation: K
• OE comparison rating: OE improved

About the FleetRunner Heavy Duty Micro-V Belt Line

The FleetRunner Heavy Duty Micro-V Belt line by Gates is specifically developed for commercial and heavy duty automotive applications. This product line focuses on delivering extended belt life and reliable power transmission under high load conditions. The K120876HD part benefits from this design philosophy, offering improved resistance to wear and heat compared to standard belts.

Technical Details and Construction

The K120876HD serpentine belt features a 12-rib design that ensures optimal grip and power transfer to accessory components such as alternators, water pumps, and air conditioning compressors. Constructed with EPDM rubber, the belt resists cracking and degradation caused by heat and ozone exposure. The polyester cord reinforcement provides tensile strength and flexibility, maintaining belt integrity under heavy loads. With an effective length of 87.6 inches and a top width of 1.647 inches, this belt fits specific automotive accessory drive systems requiring a K-section belt.

Common Applications and Problem Solving

• Replacement for worn or cracked serpentine belts in heavy duty vehicles
• Resolving belt slippage and squealing noises in accessory drive systems
• Addressing premature belt wear due to heat and mechanical stress
• Improving power transmission efficiency in commercial trucks and vans
• Maintaining reliable operation of washer pumps and other belt-driven components

Installation Notes and Tips

Ensure the belt routing matches the vehicle manufacturer’s specifications before installation. Inspect pulleys and tensioners for wear or damage to prevent premature belt failure. Use proper tensioning tools to achieve the recommended belt tension. The K120876HD belt is compatible with vehicles requiring a 12-rib K-section serpentine belt with the specified dimensions.

Quality Assurance and Warranty

Gates provides quality assurance with the FleetRunner Heavy Duty Micro-V Belt line, including the K120876HD part. This belt meets or exceeds original equipment standards with an OE improved rating. While specific warranty details vary by application, Gates products typically come with a limited warranty against defects in materials and workmanship.