Description
If you’ve been hearing a subtle knock or rumble from deep in your Ford Major’s engine, or noticed oil pressure dropping when things warm up, it’s likely time for new main bearings. These classic British agricultural workhorses are commonly used in mixed farming operations, estate work, restoration projects, and specialty agricultural applications. This set of 20 thousandths oversize bearings is what you need when your crankshaft journals have been machined to accommodate for wear.
What You’re Getting
- Complete set of main bearings sized exactly 20 thousandths over standard to match your machined crankshaft
- Heavy-duty construction built to handle the demands of agricultural work and frequent starting cycles
- Precise bore dimensions that restore proper oil clearances for reliable lubrication and pressure
- Quality materials designed to last through seasons of farm work without premature wear
Built for Real Farm Work
These main bearings are engineered for the Ford Major family – including the original Major, Power Major, and Super Major models that have been the backbone of farming operations for decades. These vintage tractors often require precise maneuvering around buildings, through tight spaces, and during loader work where manual steering becomes physically demanding and tiring. When you’re depending on your tractor for cultivation, hay making, transport work, and implement operation, you need an engine that runs smooth and strong.
Made to Last
Main bearings are the heart of your engine’s reliability – they support the crankshaft and handle every power stroke your engine produces. These bearings are manufactured to handle the constant stress of agricultural work, from low-rpm field operations to high-load transport jobs. The quality construction ensures consistent oil film thickness and proper clearances that keep your engine running clean and quiet.
Installation Notes
The 20 thou oversize designation means your crankshaft has been turned 0.020 inch undersize to clean up wear and scoring. Always verify your actual crankshaft measurements before ordering, and check that all journals have been machined to the same specification. When installing, torque main caps to specification and verify proper oil clearances with Plastigage before final assembly.
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