CATBearing & Bushing

1450171 Main Bearing — Cat 320B

This is a main bearing designed to support the crankshaft on its main journals, ensuring proper alignment and reducing friction within the engine. Manufactured to meet OEM material and dimensional standards, it provides reliable performance and durability, unlike a worn bearing that would exhibit scoring and allow excessive crankshaft movement. Operators may notice a significant increase in engine noise, a deep knocking sound, and a drop in oil pressure when this bearing fails.

Main Bearing – Part No 1450171 – 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 alloy with babbit lining
ApplicationEngine crankshaft main journals
Service LifeReplace during engine overhaul or based on oil pressure readings
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first noticeable symptom of a failing main bearing is often a deep, rhythmic knocking sound from the engine that intensifies with engine speed. If left unaddressed, this wear will lead to increased crankshaft damage, potential oil starvation to other engine components, and a high risk of severe engine failure.

Installation Tip

Ensure all crankshaft main journals and bearing bores are scrupulously clean before installing the new bearings to prevent contamination. Verify that the oil holes in the bearings align correctly with the oil supply passages in the block and crankshaft.

Service Note

Inspect the crankshaft main journals for any signs of scoring, wear, or out-of-roundness, and check the engine oil pump for proper operation.