Description
When you’re hearing that ominous knocking from your John Deere’s engine or noticing oil pressure dropping, worn main bearings are often the culprit. This isn’t a problem you can patch up with stop-leak—you need quality replacement bearings that’ll get your tractor back to work reliably. This .020-inch undersize main bearing set is what you need when your crankshaft has been machined to standard overhaul specs.
What You’re Getting
- Complete bearing set with flanged thrust bearing that controls crankshaft end play properly
- Precision-manufactured .020-inch undersize bearings for professionally machined crankshafts
- Quality construction that handles the constant stress and heat cycles of diesel engine operation
- Direct replacement for worn bearings—restores proper oil clearances and pressure
Built for Real Farm Work
This bearing set works in John Deere’s reliable 152, 164, and 179 cubic inch 3-cylinder diesel engines, whether naturally aspirated or turbocharged versions. These engines power compact and utility tractors that handle everything from loader work to mowing to light tillage. When bearings wear out, you lose oil pressure and risk complete engine failure if you keep running.
Made to Last
Engine bearings work in one of the toughest environments in your tractor—constant rotation, high temperatures, and oil contamination from normal engine wear. These bearings are manufactured to handle those demanding conditions with proper materials and precise tolerances that maintain oil film protection between the crankshaft and engine block.
Installation Notes
This is a complete engine rebuild job that requires machine shop work to turn the crankshaft .020-inch undersize before installing these bearings. Make sure your machine shop checks all clearances and surface finish. While you’re this deep into the engine, it’s smart to replace connecting rod bearings, oil pump, and seals at the same time.
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