Description

When your John Deere’s engine starts knocking or you’ve got low oil pressure after an overhaul, chances are it’s time for a complete bearing replacement. This main bearing set is engineered .020 inches undersized for crankshafts that have been machined down during engine rebuild—the exact solution you need to restore proper clearances and get your tractor running like new again.

What You’re Getting

Complete set of main bearings sized .020 inches under standard specifications for machined crankshafts
Includes thrust washers to control crankshaft endplay and prevent forward/backward movement
Precision-manufactured to maintain proper oil clearances for reliable lubrication
Quality materials that handle the constant load cycles of diesel engine operation
Direct replacement during engine overhaul—no modifications needed

Built for Engine Rebuilds

This bearing set is designed for John Deere diesel engines during major overhaul work. When your crankshaft journals show wear from years of hard farm work, they need to be turned down .020 inches to get back to a smooth surface. These undersized bearings restore the proper clearances so oil pressure stays where it should and your engine runs smooth instead of rattling.

Made to Last

Engine bearings work in some of the toughest conditions inside your motor—constant pressure, high temperatures, and the vibration that comes with diesel operation. These bearings are manufactured to handle those demanding conditions with materials that resist wear and maintain proper oil film thickness throughout the engine’s service life.

Good to Know

This is precision work that requires proper measuring tools and engine rebuild experience. Your machine shop will need to verify the actual crankshaft dimensions before ordering. The thrust washers are crucial—they prevent the crankshaft from moving forward or backward, which can destroy the timing gears. During installation, check all clearances with plastigage and follow proper torque specifications for the main caps.