Description

When you’re hearing that deep knocking sound from your tractor’s engine or noticing oil pressure dropping during hard pulls, it’s likely time for main bearing service. The Perkins AD3-152 three-cylinder diesel engine found in the MF 135 and other tractors has been powering farm work for decades, but like any hardworking engine, those main bearings eventually need attention. This 0.020 oversize bearing set gets your engine back to tight tolerances and reliable operation.

What You’re Getting

Complete main bearing kit with precision-manufactured 0.020 oversize bearings for proper crankshaft fit
TISCO quality construction designed to handle the heavy loads of agricultural work
Direct replacement for worn original bearings – restores proper oil clearances and pressure
One complete kit services the entire crankshaft in your AD3-152 engine

Built for Real Farm Work

These bearings are designed for the reliable Perkins AD3.152 three-cylinder engine that powers MF 135 tractors and similar models, delivering 45 horsepower for loader work, mowing pastures, and pulling implements. Whether you’re running a compact utility tractor for hay operations or handling general farm duties, this engine has earned its reputation for dependability when maintained properly.

Made to Last

Main bearings take tremendous loads every time you fire up the engine, especially during cold starts and heavy pulls. These precision bearings are manufactured to exacting tolerances and built to handle the constant stress of supporting your crankshaft through thousands of hours of operation. The 0.020 oversize specification compensates for normal crankshaft wear, restoring factory-fresh clearances.

Good to Know

Installing main bearings requires splitting the tractor – this is serious engine work best left to experienced mechanics. Before installation, have your crankshaft checked for proper dimension and surface finish. The journals should be turned 0.020 undersize to match these bearings. Always replace the rear main seal while you’ve got everything apart, and use proper torque specifications when reassembling.