CATBearing & Bushing

8N8227 Main Bearing — Cat 3306

This is a high-performance main bearing designed to support the crankshaft in Caterpillar industrial engines, ensuring smooth and efficient operation. Manufactured to meet rigorous OEM standards, it provides superior load capacity and wear resistance over a worn bearing that can cause increased friction and vibration. Operators may notice a rougher engine idle, increased exhaust smoke, or audible knocking sounds when this bearing begins to fail.

Main Bearing – Part No 8N8227 – CAT Spare Part
Part Specifications
BrandCAT
CategoryBearing & Bushing
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

WhatsApp for Price & Availability☎ Call Mumbai Office

Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

IST.', };

Related CAT Parts

From the same category — may also be needed

5J6418
Bearing
0990718
Bearing
2H7023
Bearing-Needle
8N7935
Bearing
1P7895
1P7896
3285572
Bearing

Browse all CAT Bearing Bushing →

Installation & Application Notes

Never strike bearings directly — use a bearing press or driver set. Heat housing (not bearing) to ease installation. Replace bearings in sets where applicable. Check housing bore diameter before fitting — out-of-round bores destroy new bearings.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeMain Bearing
MaterialSteel-backed babbitt alloy
ApplicationEngine crankshaft main journals
Service LifeReplace per engine overhaul schedule
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

A failing 8N8227 main bearing can initially present as increased engine vibration or a noticeable loss of engine power. If ignored, this can lead to excessive crankshaft wear, potential bearing seizure, and reduced oil pressure, ultimately risking severe internal engine damage. Continued operation could compromise the entire engine assembly.

Installation Tip

Ensure the crankshaft and bearing bores are perfectly clean and free of any oil or debris before installing the new bearings. Never reuse old bearing bolts; always use new ones with the correct torque specifications.

Service Note

Inspect the crankshaft for any signs of scoring or damage, and check the oil pump and lubrication system for proper function.