CATBearing & Bushing

8N8225 Main Bearing — Cat 3306

This main bearing is a critical component that supports the engine's crankshaft, allowing it to rotate freely within the engine block. It is designed to withstand high loads and temperatures, ensuring proper engine operation and longevity. Symptoms of a failing bearing include increased engine noise, low oil pressure, and potential loss of power, signaling an urgent need for replacement.

Main Bearing – Part No 8N8225 – 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.

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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 alloy with bearing surface
ApplicationEngine crankshaft support
Service LifeReplace during engine overhaul or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A worn main bearing will often produce a distinct knocking sound from the engine, particularly noticeable at lower RPMs. Continued operation can lead to a significant drop in oil pressure and increased engine vibration, potentially causing severe internal damage.

Installation Tip

Ensure the crankshaft journals are perfectly clean and free of any burrs or imperfections before seating the new bearing. Never reuse old bearing shells or attempt to file or grind the bearing surfaces.

Service Note

When replacing main bearings, it is crucial to inspect the crankshaft for any signs of wear or damage and check the oil pump for proper function.