CATBearing & Bushing

8N7927 Main Bearing — Cat Engine: D342

This main bearing is a vital component within the engine's crankshaft assembly, designed to reduce friction and support the rotating shaft. Manufactured to meet rigorous OEM quality standards, it provides superior wear resistance and load-bearing capacity compared to a worn bearing. Operators may experience a drop in oil pressure, knocking sounds from the engine, or increased oil consumption if this bearing fails.

Main Bearing – Part No 8N7927 – 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
Service LifeReplace during engine overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of main bearing failure is often a persistent knocking or rumbling noise originating from the engine's lower end. As the condition worsens, engine oil pressure will likely drop significantly, and the engine may exhibit reduced power. Continued operation with failing main bearings can lead to severe crankshaft and block damage.

Installation Tip

Ensure the crankshaft journals and bearing bores are meticulously cleaned and free of any debris before installing new bearings. Never reuse old bearing shells, even if they appear to be in good condition.

Service Note

Inspect crankshaft journals for scoring or out-of-roundness, and check connecting rod bearings when replacing main bearings.