Description

When your pulley starts slipping or comes loose, you’ll know it right away—your charging system quits working, your engine starts running hot, or your belt just won’t stay tight. That little steel key between your crankshaft and front pulley is what keeps everything lined up and locked in place. When it shears or wears out, your whole belt-driven system goes out of whack.

What You’re Getting

Precision-machined steel that handles the constant torque and vibration these engines dish out
Exact fit for the crankshaft nose on your Perkins 3.152 engine
Heat-treated construction that won’t give up under the loads of daily farm work
Direct replacement that installs just like the original

Built for Real Farm Work

Your MF 35 or 135 with the Perkins 3.152 diesel is a proven workhorse that’s been handling farm chores for decades. Whether you’re running hay equipment, pulling a loader, or just doing the daily rounds, that front pulley drives your cooling fan, water pump, and generator. This key keeps all those systems running in sync so your tractor stays cool and keeps charging.

Made to Last

The Perkins 3.152 is known for being tough and reliable, but it puts out plenty of vibration and load reversals that can wear out a key over time. This one’s made from quality steel and heat-treated to handle whatever your engine throws at it. It’s built to the same specs as the original, so it’ll fit tight and stay put.

Installation Notes

You’ll need to pull the front pulley to get to the keyway—clean out any debris or old key material before installing the new one. Make sure the key seats properly in both the crank and pulley keyways before tightening everything back up. If the keyway in your pulley is worn or wallowed out, you’ll want to replace the pulley too for a proper fit.