When your Allis Chalmers tractor starts knocking or showing metal in the oil, those worn main bearings are telling you it’s time for attention. A failed main bearing can turn an otherwise good engine into scrap iron, but catching it early means you can get back to work without breaking the bank. This .020″ undersized main bearing kit gives you everything needed to rebuild your 125 cubic inch 4-cylinder gas engine and restore that smooth, quiet operation you remember.
What You’re Getting
- Complete main bearing set sized .020″ under for proper fit with machined crankshaft journals
- TISCO quality bearings engineered to handle the loads and RPM of farm work
- Precision-manufactured to restore proper oil clearances and bearing life
- Direct replacement for worn bearings in your 125 CID gas engine rebuild
Built for Real Farm Work
This bearing kit is designed specifically for the 125 cubic inch 4-cylinder gas engines found in various Allis Chalmers tractors. Whether you’re running a smaller utility tractor for chores around the farm or working ground with implements, this engine has been a reliable workhorse for decades when properly maintained.
Made to Last
These bearings are built to handle the daily grind of farm work – the dust, vibration, and varying loads that come with real agricultural use. The TISCO brand has earned its reputation by providing quality engine components that hold up under tough conditions, giving you the reliability you need when there’s work to be done.
Good to Know
The .020″ undersized dimension means your crankshaft will need to be machined to the proper undersize specification before installation. This is standard practice when rebuilding an engine with worn journals. Have your machine shop check all clearances during assembly – proper bearing clearance is critical for oil pressure and bearing life. While you’re rebuilding, it’s wise to check the connecting rod bearings too, as they typically wear at similar rates.
