Description
When you’re hearing that telltale knocking from your Allis Chalmers engine, it’s usually the main bearings telling you they’ve seen enough miles. A worn bearing set can quickly turn into expensive crankshaft damage if you don’t address it soon. This .010 undersized main bearing set is designed for engines where the crankshaft has been machined down to restore proper clearances and get you back to reliable operation.
What You’re Getting
- Complete main bearing set sized .010 under standard for properly machined crankshafts
- Includes flanged thrust bearing to control crankshaft end play and prevent costly damage
- Quality construction that handles the demanding loads of agricultural diesel engines
- Direct replacement that restores proper oil clearances and bearing life
- One complete kit services your entire 301 CID 6-cylinder diesel engine
Built for Real Farm Work
This bearing set is engineered specifically for the 301 cubic inch 6-cylinder diesel engines found in Allis Chalmers 649I through 649T series tractors. These workhorses powered everything from field cultivation to heavy tillage operations, and when properly maintained, they’re known for their reliability and longevity in demanding agricultural applications.
Made to Last
Main bearings are the foundation of your engine’s reliability. These bearings are manufactured to handle the constant loads and temperature cycles that diesel engines face during long work days. The flanged thrust bearing design keeps your crankshaft positioned properly while the main bearings provide the smooth, low-friction surface your crankshaft needs.
Installation Notes
This undersized bearing set requires a crankshaft that’s been machined .010 under standard – they won’t work with a standard crankshaft. Always check your crankshaft measurements and surface finish before installation. Proper torque specifications and assembly lube are critical for bearing longevity, so follow your service manual procedures carefully.
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