CATBearing & Bushing

1450165 Main Bearing — Cat 120H 120H ES

This main bearing is a vital component for the crankshaft in an engine, designed to provide a low-friction interface between the crankshaft journals and the engine block. Manufactured to precise specifications, it ensures optimal oil film support and durability, outperforming a worn or damaged bearing. Operators may notice a drop in oil pressure, increased engine noise, or a knocking sound from the bottom end of the engine when this main bearing begins to fail.

Main Bearing – Part No 1450165 – 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
MaterialSteel-backed aluminum alloy
ApplicationEngine crankshaft
Service LifeReplace during engine overhaul
CompatibilityCTP aftermarket replacement
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The first sign of main bearing failure is often a decrease in oil pressure, especially at higher engine speeds. This can progress to audible knocking or rumbling noises from the engine's lower end. If left unaddressed, bearing material can break away, leading to severe crankshaft and block damage, potentially resulting in a seized engine.

Installation Tip

Ensure crankshaft journals and bearing surfaces are meticulously cleaned and inspected for any imperfections before installing new bearings. Always use new main bearing bolts and torque them in the specified sequence and to the correct values.

Service Note

Inspect the crankshaft for straightness and wear on the journals; also, check the connecting rod bearings for wear.