When your John Deere’s engine starts knocking or making those grinding noises you never want to hear, worn main bearings are usually the culprit. This complete bearing set gives you what you need to get your engine rebuilt properly and back to reliable power when it matters most.
What You’re Getting
- Complete kit with seven bearings – one flanged thrust bearing and six standard main bearings
- Precision .030″ undersize to work with machined crankshafts during rebuild
- Includes flanged thrust bearings that handle the end-play and axial loads your engine creates
- Direct replacement for OEM numbers AT21136 and AT21114 – fits like the originals
Built for Heavy-Duty Engines
This bearing set is engineered for John Deere’s workhorse 6-cylinder diesel engines including the 329 CID, 359 CID, and 414 CID turbocharged powerplants. These are the engines that power the tractors handling your toughest jobs – from heavy tillage to big baler operations where engine reliability can make or break your season.
Made to Handle the Load
Main bearings in farm tractors deal with constant heavy loads, temperature cycles, and the vibrations that come with PTO work and field operations. These bearings use quality materials and precise tolerances to handle the punishment while maintaining proper oil clearances for years of reliable service.
Installation Notes
This is an undersized bearing set designed for engines with crankshafts that have been turned .030″ under during rebuild. Make sure your machine work matches this bearing size before installation. Proper torque specs and assembly procedures are critical – don’t skip the details when you’re this deep into an engine rebuild.
