Gates K120878HD Serpentine Belt - Fan and Alternator

Reliable Heavy Duty Serpentine Belt for Automotive Applications

The Gates FleetRunner Heavy Duty Micro-V Belt K120878HD is engineered to provide durable and efficient power transmission for a variety of automotive vehicles. Designed with heavy-duty applications in mind, this serpentine belt offers consistent performance and long service life.

• Top width of 1.647 inches (42 mm) for optimal fit and power transfer
• Effective length of 87.82 inches (2231 mm) ensuring precise compatibility
• 12 rib automotive v-ribbed belt design for enhanced grip and reduced slippage
• Constructed with EPDM belt material and polyester cord for durability and heat resistance
• OE improved rating for reliable replacement and performance

About the FleetRunner Heavy Duty Micro-V Belt Line

The FleetRunner Heavy Duty Micro-V Belt line by Gates is specifically designed for demanding automotive accessory drive systems. This product line focuses on delivering enhanced durability and resistance to wear under heavy loads and harsh operating conditions. The K120878HD part benefits from this engineering, making it suitable for vehicles requiring a robust serpentine belt solution.

Technical Specifications and Features

This serpentine belt features a cross section designation of 'K' and an outside circumference of approximately 88.39 inches (2245 mm). The 12-rib design ensures smooth power transmission to multiple engine accessories, reducing noise and vibration. The EPDM (ethylene propylene diene monomer) belt material offers excellent resistance to heat, ozone, and wear, while the polyester cord provides tensile strength and flexibility. The inclusion of an EPDM washer pump component further supports durability in accessory drive systems.

Common Applications and Problem Solving

• Replacement for worn or cracked serpentine belts in heavy-duty automotive engines
• Addresses belt slippage and loss of accessory function such as alternator or power steering
• Helps prevent premature belt failure due to heat and wear in demanding conditions
• Suitable for vehicles requiring a 12-rib, 1.647 inch wide, 87.82 inch long serpentine belt
• Compatible with automotive models needing OE improved serpentine belt replacements

Installation Notes and Tips

Ensure the belt routing matches the vehicle manufacturer’s specifications before installation. Verify the belt length and rib count correspond to the original equipment to avoid fitment issues. Use proper tensioning tools to achieve the recommended belt tension, preventing premature wear or slippage. Inspect pulleys and accessory components for wear or damage during replacement to maintain system integrity.

Quality Assurance and Warranty

The Gates FleetRunner Heavy Duty Micro-V Belt K120878HD is manufactured to meet or exceed original equipment standards. The use of EPDM and polyester materials ensures resistance to environmental factors and mechanical stress. Gates provides a limited warranty on this part, covering defects in materials and workmanship under normal use conditions.