CATBearing & Bushing

8N5347 Main Bearing — Cat 1693 769B

This is a high-performance main bearing essential for the proper functioning of the engine's crankshaft. Manufactured to meet rigorous OEM standards, it provides a durable, low-friction surface that withstands extreme operating pressures far better than a worn bearing. Operators might observe a significant drop in oil pressure, knocking sounds from the engine, or a general loss of power when this bearing is compromised.

Main Bearing – Part No 8N5347 – 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 TypeEngine Main Bearing
MaterialTri-metal alloy
ApplicationEngine crankshaft support
Service LifeReplace during engine overhaul or based on oil analysis
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing main bearing often first presents as a distinct knocking or rumbling sound from the engine, especially under load. As the wear progresses, oil pressure will drop noticeably, and engine performance will degrade. Continued operation risks crankshaft damage and potential engine seizure.

Installation Tip

Ensure the crankshaft journals are perfectly clean and free of any burrs or imperfections before installing the new bearings. Never mix and match bearing shells; always use complete sets and ensure correct orientation.

Service Note

Inspect the crankshaft journals for scoring or wear, and check the oil pump and oil filter for any debris.