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0.25mm Oversize Main Bearing Set for Cummins 6B Engine

Original price was: $50.16.Current price is: $38.80.

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SKU: QTP-Q3802071 Category:

When your tractor’s engine starts knocking or showing signs of low oil pressure, worn main bearings are often the culprit. This 0.25mm oversize bearing set gives your Cummins 6B engine a second lease on life by providing the extra material needed after your crankshaft has been machined to restore proper clearances. Instead of hunting for a replacement engine, you can get back to reliable operation with a proper bottom-end rebuild.

What You’re Getting

  • Complete bearing set sized 0.25mm oversize to match machined crankshafts
  • Precision-manufactured bearings that restore proper oil clearances and pressure
  • Quality construction that handles the demands of agricultural applications
  • Direct replacement for worn standard bearings after crankshaft work

Built for Real Farm Work

These bearings fit the Cummins 6B engines found in Case IH Maxxum and MX series tractors—machines that might start the day on the feed mixer, switch to loader work by noon, and finish pulling a disc in the afternoon. These mid-size tractors handle everything from row crop work to heavy transport duties, and their engines need bearings that can take the constant load cycling that comes with farm work.

Made to Last

Engine bearings take tremendous loads, especially in agricultural applications where engines run for hours at varying RPMs. This bearing set is manufactured to handle the punishment of diesel operation under load, from long days in the field to PTO work that keeps the engine under constant stress.

Installation Notes

Installing oversize bearings requires having your crankshaft machined by a qualified machine shop to the proper dimensions. Always check crankshaft journal diameter with a micrometer before ordering. Most shops will recommend replacing both main and rod bearings at the same time if you’re doing a complete rebuild—it’s good insurance for long-term reliability.