Description

If your John Deere’s got a knock or is showing metal in the oil, it’s time to get serious about the bottom end. This oversized main bearing set lets you salvage a worn crankshaft that’s been machined .020 over standard size. Rather than scrapping that expensive crank or hunting down a replacement, you can machine the journals and get back to farming with bearings that’ll handle whatever you throw at them.

What You’re Getting

Complete main bearing set machined to .020 inch oversize specification
Flanged thrust bearings included to control crankshaft end play
Off-center locating tabs on both bearing halves for proper alignment
Precision-engineered to restore proper oil clearances in worn engines
Quality materials that handle the heat and pressure of diesel operation

Built for Real Farm Work

This bearing set works in both the 381 CID six-cylinder found in many mid-range tractors and the larger 404 CID six-cylinder that powered the workhorses of their era. Whether you’re rebuilding a utility tractor for loader work or bringing a row-crop machine back to life for spring planting, these bearings restore the foundation your engine needs to make reliable power.

Made to Last

Engine bearings are one place you don’t want to cut corners. These are built to handle the combustion pressures and thermal cycling that destroy lesser bearings. The flanged thrust bearings keep your crankshaft properly positioned while the precision oil grooves ensure proper lubrication flow throughout the RPM range.

Good to Know

You’ll need to have your crankshaft machined .020 under standard size to use these bearings. Check your block casting numbers before ordering – this set doesn’t fit block R40930. When installing, pay attention to those off-center locating tabs – they’re designed that way for a reason and ensure the oil holes line up properly.