CATBearing & Bushing

4n7357 Bearing — Cat 3408 3412

This is a CAT bearing, designed to support the rotating crankshaft within large diesel engines, crucial for efficient power generation. Manufactured to precise OEM tolerances and high-grade materials, it offers exceptional durability and performance compared to a worn or damaged bearing. Operators may notice increased engine noise, a knocking sound, or a significant drop in oil pressure when this bearing fails.

Bearing – Part No 4n7357 – 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 Bearing
MaterialTri-metal alloy
ApplicationCrankshaft main journal
Service LifeReplace during engine overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of a failing crankshaft main bearing is often a deep knocking sound from the engine, particularly noticeable at lower RPMs or under load. Continued operation will likely lead to a significant drop in oil pressure and potentially increased engine vibration. The worst consequence of a failed main bearing is severe damage to the crankshaft and engine block, leading to complete engine failure.

Installation Tip

Ensure the crankshaft journals and bearing bores are perfectly clean and free from any abrasive particles before installation. Never use an abrasive material to clean bearing surfaces, as this can cause damage.

Service Note

When replacing crankshaft bearings, it is critical to inspect the crankshaft for straightness and wear, and to verify the oil pump's output and pressure.