Description

When your International Harvester starts knocking or you notice metal shavings in the oil, it’s time to address worn main bearings before they turn a rebuild into a complete engine replacement. This TISCO main bearing kit gives you everything needed to restore proper crankshaft support in that reliable 4-cylinder engine, getting you back to work with confidence instead of wondering when that knock will become a catastrophic failure.

What You’re Getting

Standard size bearings that fit properly without machine shop work
Quality TISCO construction that meets or exceeds original specifications
Complete set covers all main bearing positions for thorough rebuild
Proper clearances ensure adequate oil flow and long service life
Direct replacement for worn original bearings in standard crankshafts

Built for Real Farm Work

This kit fits the popular 4-cylinder International Harvester tractors including 100 series, 200 series, Super A-1, Super AV-1, and Super C models that have been the backbone of small to medium farms for decades. The 123 cubic inch engine with its 3-1/8 inch bore has powered everything from cultivating row crops to running hay balers, and proper main bearings are critical for handling those loads reliably.

Made to Last

Farm engines work hard under varying loads and temperatures, from cold morning starts to long days under full load. These bearings are manufactured to handle the demanding conditions of agricultural use, with proper materials and tolerances that provide the oil film thickness needed for protection. Quality bearings mean fewer breakdowns and more seasons of dependable service.

Good to Know

Installing main bearings requires splitting the tractor, so it’s typically done during a major overhaul or when the engine is out for other work. Check your crankshaft for wear and proper dimensions before installation – standard bearings only work with unworn journals. If you’re doing the work yourself, a good torque wrench and bearing clearance measurements are essential for proper assembly.