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When your engine starts knocking or you notice oil pressure dropping, worn main bearings are often the culprit. The crankshaft bearings in your NEF engine work harder than any other component—spinning thousands of RPM while supporting tons of rotating weight and handling combustion forces. These standard-size main bearings restore that critical oil film between your crankshaft and block, getting your engine back to smooth, quiet operation. What You're Getting Standard size bearings that match factory specifications for proper clearances Precision-manufactured bearing shells with proper oil grooves and clearances High-grade bearing material designed for diesel engine loads and heat Complete set covers all main bearing positions in your NEF engine Direct replacement for worn bearings—no machine work needed on standard journals Built for Real Farm Work These bearings are engineered specifically for the Iveco NEF engines found in Case Puma series tractors and New Holland T6000 and T7000 series machines. Whether you're running a Puma 180 through heavy tillage or using your T6030 for loader work around the farm, these engines see serious duty. The NEF is a workhorse powerplant that demands quality bearings to handle the constant load cycles of real farm work. Made to Last Engine main bearings take tremendous abuse—they're under constant pressure while dealing with combustion heat, oil contamination, and vibration. These replacement bearings use advanced bearing materials and coatings that resist wear and maintain proper oil clearances longer than standard bearings. They're built to handle the punishment of diesel engines working hard day after day. Good to Know This is a job for someone comfortable with engine teardown—main bearing replacement requires removing the crankshaft. Check your crankshaft journals with a micrometer before installing new bearings to ensure they're within standard size limits. If journals are worn beyond spec, you'll need undersized bearings and machine work. Always replace all main bearings as a set and check connecting rod bearings while you're in there.