Hayden 2779 Engine Cooling Fan Clutch

Hayden 2779 Severe Duty Thermal Fan Clutch

The Hayden 2779 is a severe duty thermal engine cooling fan clutch built for standard-rotation truck and light-duty cooling systems. With an aluminum body, thermal operation, and OE-matching fitment details, it is a direct replacement choice for Ford Ranger and Mazda B3000 applications that need consistent fan engagement under demanding conditions.

Key Features

• Brand: Hayden Fan Clutch
• Part number: 2779
• Severe duty thermal fan clutch for truck cooling systems
• Standard rotation, non-electronic design
• Aluminum construction with raw aluminum finish
• Meets or exceeds OEM requirements
• Performance rated for demanding use
• Mounting type: HEX
• Fan bolt circle: 3.25 in. (82.6 mm)
• Mount diameter: 1.44 in. (36 mm)
• Pilot diameter: 1.18 in. (30 mm)

Product Details

Hayden Fan Clutch 2779 is a thermal severe duty fan clutch engineered for applications that rely on temperature-responsive fan engagement. The aluminum housing and standard rotation layout support direct replacement service on compatible Ford Ranger, Ford F-100 Ranger, and Mazda B3000 cooling systems. This part cross-references Gates 22078 for the same application.

Compatible vehicle coverage includes Fits 1998-2008 Ford Ranger, N/A; Fits 1998-2001 Ford F-100 Ranger, N/A; Fits 1994-2008 Mazda B3000, N/A; and additional Ford Ranger and F-100 Ranger applications listed by year and cooling configuration. The Hayden 2779 is a practical choice when replacing a worn thermal fan clutch on a Ranger or B3000 that uses a severe duty truck fan drive.

Common Cooling Issues It May Address

• Fan clutch that no longer engages at the proper temperature
• Reduced airflow through the radiator at idle or low speed
• Cooling fan noise caused by a failing clutch mechanism
• Overheating concerns during towing, hauling, or stop-and-go driving
• Inconsistent cooling performance in severe duty truck use

Installation Notes and Tips

Verify standard rotation, bolt pattern, pilot dimensions, and fan bolt circle before installation. Mounting hardware is not included, so reuse or source the correct hardware as needed. Confirm the vehicle’s cooling package and fan clutch style against the listed fitment notes, especially on Ford Ranger and Mazda B3000 models with super cooling or severe duty thermal fan clutch requirements.

Quality Assurance

Hayden identifies this fan clutch as new, performance rated, and built to meet or exceed OEM specifications. The severe duty thermal design is intended for truck applications that require dependable fan drive control under higher thermal loads.