Description

Nothing’s more frustrating than watching your tractor’s cooling fan run constantly when you’re doing light work, burning fuel and making noise for no good reason. Or worse yet, having it fail to kick in when you’re working hard and need maximum cooling. This viscous fan clutch brings back that smart, automatic cooling control your John Deere was designed to have—engaging the fan only when temperatures demand it.

What You’re Getting

Temperature-activated engagement that saves fuel by not running the fan unnecessarily
Sealed, maintenance-free construction that won’t leak the silicone fluid
Progressive engagement that gradually increases cooling as heat builds up
Heavy-duty bearings that handle constant speed changes without developing play
Quieter operation during light loads when you don’t need full cooling

Built for Real Farm Work

Your 6810, 6910, or 6910S represents serious horsepower for demanding field operations. Whether you’re starting morning chores with cool conditions or pulling heavy equipment through summer heat, this viscous clutch adapts automatically. It stays disengaged during light work to save fuel, then progressively locks up as engine temperature rises to deliver full cooling power when you need it most.

Made to Last

This clutch uses temperature-sensitive silicone fluid that changes viscosity as heat increases. The permanently sealed design prevents the fluid loss that kills most viscous clutches. Quality bearings handle the constant engagement and disengagement cycles without wearing out, while the calibrated temperature response stays consistent season after season.

Good to Know

Check your fan blades before installation—damaged or unbalanced blades will destroy a new clutch quickly. The fan should freewheel easily when cold, then you’ll hear and feel it engage as the engine warms up. Full lockup typically happens around 200 degrees coolant temperature. If your old clutch is stuck, use penetrating oil on the mounting bolts before removal.