Description

If you’ve noticed your crankshaft pulley wobbling or your flywheel making noise, there’s a good chance the small but mighty woodruff key has let go. This semicircular key locks your crankshaft components in perfect alignment, preventing them from slipping when you’re pulling hard or running at high RPM. Without it, your tractor’s just not going to run right—and might cause serious damage if that pulley starts wandering around.

What You’re Getting

Precise 5/16 x 1.5-inch dimensions that lock components exactly where they need to be
Heavy-duty construction that handles the torque and vibration of hard-working diesel engines
Direct replacement for original equipment—no modifications or special tools needed
Hardened steel construction resists shearing under high loads and stress

Built for Real Farm Work

This key fits a wide range of Ford New Holland tractors from the dependable 5000 series utility models to the bigger 7600 workhorses, plus many Case IHC models from compact utilities to row-crop machines. Whether you’re running a hay operation, doing field work, or handling livestock chores, these are the tractors that keep farms running day after day.

Made to Last

Farm equipment puts tremendous stress on every component, and woodruff keys take their share of punishment. This one’s engineered to handle the shock loads and constant vibration that come with diesel engines under load. The precise machining ensures a tight fit in both the crankshaft keyway and the component being secured.

Good to Know

Installation requires removing the crankshaft component (like the pulley or flywheel) to access the keyway—this isn’t typically a roadside repair. Before installing the new key, clean the keyway thoroughly and check for any burrs or damage. The key should slide in snugly but not require forcing. If you’re doing flywheel work, it’s a good time to check the clutch while everything’s apart.