Description

When you’re hearing that telltale knock from under the hood or noticing oil pressure dropping, it’s usually time for new main bearings. An engine rebuild is a big job, but with the right parts, you can get that old John Deere running strong for years to come. This main bearing kit gives you everything needed to properly support your crankshaft and keep your engine’s bottom end solid.

What You’re Getting

Complete set with both flanged thrust bearings and standard main bearings for proper crankshaft positioning
Off-center bearing locating tabs on both halves ensure correct installation and prevent rotation
Standard bore size that fits original crankshaft specifications without machine work
Quality TISCO construction designed to handle the demands of agricultural work

Built for Real Farm Work

This kit fits the 301 cubic inch 6-cylinder gas engines found in older John Deere tractors, plus the 340 CID engines in specific applications. These are the workhorses that powered many farms through decades of plowing, cultivating, and hauling. Whether you’re restoring a classic tractor or keeping a reliable old machine running, this bearing set gets the job done right.

Made to Last

Engine bearings take tremendous stress from combustion forces and constant rotation under heavy loads. These bearings are manufactured with proper clearances and quality materials to provide the oil film protection your crankshaft needs. The flanged thrust bearing controls crankshaft end play while the mains support the rotating assembly through thousands of hours of operation.

Installation Notes

This is a complete rebuild job that requires proper tools, torque specifications, and clean assembly practices. Check your engine block numbers to ensure compatibility—some early and late blocks use different bearing sets. Take time to measure crankshaft journals and check for proper clearances before final assembly. A little extra care during installation pays off with years of reliable service.