CATBearing & Bushing

2944891 Main Bearing Kit — Cat 236B 236B3

This is a Main Bearing Kit, essential for supporting the crankshaft within the engine's crankcase and ensuring proper rotational alignment. It is engineered to meet the rigorous demands of engine operation, providing superior wear resistance and load-bearing capacity compared to a worn or damaged set. Operators may experience a noticeable drop in oil pressure, increased engine noise, or rough running if these main bearings begin to fail.

Main Bearing Kit – Part No 2944891 – 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 Kit
MaterialSteel alloy with bearing material
ApplicationEngine crankshaft support
Service LifeReplace during engine overhaul
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

Early signs of main bearing failure include a persistent knocking or deep rumbling sound from the engine, especially under load, and a gradual decrease in oil pressure. If ignored, this can lead to severe crankshaft and block damage, potentially causing engine seizure. The risk is significant damage to the engine block and crankshaft, necessitating a complete engine rebuild.

Installation Tip

Ensure the crankshaft journals and the bearing bores in the engine block are perfectly clean and free of any burrs or debris before installation. Never reuse old bearing caps or bolts; always use new, properly torqued fasteners as specified in the service manual.

Service Note

When replacing main bearings, it is crucial to inspect the crankshaft journals for wear or damage and check the connecting rod bearings as well.