CATBearing & Bushing

4543935 Main Bearing Kit — Cat 120M 120M 2

This is a Main Bearing Kit, essential for the proper functioning of the engine's crankshaft by supporting its rotation. It is manufactured to meet stringent OEM quality standards, offering superior wear resistance and load-bearing capacity compared to a worn kit. Operators might observe a significant drop in oil pressure, knocking sounds from the engine, or a general loss of engine power when this kit fails.

Main Bearing Kit – Part No 4543935 – 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 overlay
ApplicationEngine crankshaft support
Service LifeReplace during engine overhaul or as needed
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The first symptom of main bearing failure is often a deep, rhythmic knocking sound from the engine, especially under load. This can progress to a noticeable loss of engine power and a significant drop in oil pressure. Continued operation risks severe engine damage, potentially requiring a complete engine rebuild.

Installation Tip

Ensure the crankshaft journals and bearing bores are meticulously cleaned and free of any abrasive particles. Never reuse old bearing shells, and always lubricate new bearings with clean engine oil before installation.

Service Note

Inspect crankshaft journals for wear or scoring, and check the oil pump and oil passages for blockages.