Description
When your engine starts rattling or you notice oil pressure dropping during hard work, it’s usually telling you the main bearings have seen better days. These Perkins A4.212, A4.236, and A4.248 engines power some of the most dependable Massey Ferguson tractors ever built – from the popular 165 and 175 models handling mid-range farm work to the bigger 590 and 675 tractors tackling serious commercial operations. This oversize bearing set gets your engine back to tight tolerances and reliable service.
What You’re Getting
- Complete main bearing set for all journals – everything you need for a proper rebuild
- 20 thousandths oversize to work with reground crankshafts that have been machined to restore proper surface finish
- Quality bearing materials designed to handle diesel engine loads and temperatures without premature wear
- Precision manufacturing ensures proper oil clearances for reliable lubrication and long service life
Built for Hard-Working Farm Engines
These engines are the heart of tractors that spend their days running disks, pulling planters, cutting silage, and handling the heavy work that keeps farms productive. Whether you’re running a 165 on a 200-acre operation or working a 690 through commercial farming tasks, these bearing-equipped engines are built to handle whatever you throw at them. The oversize bearings compensate for normal crankshaft wear that happens over years of faithful service.
Made to Last
Engine bearings take tremendous loads and heat cycles, especially in agricultural applications where tractors often run at high loads for extended periods. These bearings are engineered to handle the pressure fluctuations and temperature extremes common in farm work, providing reliable protection for your crankshaft and maintaining proper oil pressure. Quality materials and construction mean they’ll give you years of reliable service.
Installation Notes
This is a complete engine rebuild job that requires proper machine shop work on your crankshaft to achieve the 20 thousandths undersize dimensions. Make sure your machinist checks all journals for proper finish and dimensions before assembly. Follow proper torque sequences and specifications during installation, and ensure all surfaces are perfectly clean before reassembly. It’s also a good time to replace your rod bearings and check other internal engine components while you have everything apart.
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