CATBearing & Bushing

1280384 Main Bearing — Cat Engine: 3176C 3196

This main bearing is a critical component of the engine's rotating assembly, designed to reduce friction between the crankshaft and the engine block. It is manufactured to meet stringent OEM quality standards, ensuring superior durability and performance compared to worn bearings that exhibit scoring or material loss. Operators may notice a knocking or rattling sound from the engine, especially under load, and a significant decrease in oil pressure if this bearing fails.

Main Bearing – Part No 1280384 – 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
MaterialSteel-backed babbitt
ApplicationEngine crankshaft support
Service LifeReplace based on engine overhaul schedule
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A persistent knocking or deep rumbling noise from the engine, particularly noticeable when accelerating or under heavy load, is the first sign of main bearing failure. If ignored, this noise will intensify, potentially leading to increased engine vibration and a noticeable drop in oil pressure. Continued operation risks severe crankshaft and block damage.

Installation Tip

Ensure the crankshaft journals are meticulously cleaned and free of any debris before installation to prevent premature wear. Avoid overtightening the bearing caps, as this can distort the bearing shells and compromise oil clearance.

Service Note

Inspect the crankshaft journals for scoring or wear, and check the connecting rod bearings for signs of damage.