CATBearing & Bushing

4484220 Main Bearing Kit — Cat Engine: C4

This main bearing kit provides essential components for the primary rotating shaft within an engine, designed to reduce friction and support significant loads during operation. Manufactured to meet rigorous OEM standards, these bearings offer superior wear resistance and precise tolerances compared to worn bearings that can cause increased friction, heat, and potential engine damage. Operators may observe increased engine noise, oil pressure issues, or a noticeable reduction in engine performance when this kit is failing.

Main Bearing Kit – Part No 4484220 – 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 Babbitt Lining
ApplicationEngine Crankshaft
Service LifeReplace during engine overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first noticeable symptom of failing main bearings is often a deep, heavy knocking sound from the engine, particularly under load. This can be accompanied by a significant drop in oil pressure, indicating reduced lubrication effectiveness. If left unaddressed, continued operation will lead to severe crankshaft and bearing journal damage, potentially resulting in catastrophic engine failure and extensive repair costs.

Installation Tip

Ensure all crankshaft journals and bearing bores are meticulously cleaned and inspected for any imperfections before installing the new bearings. Always use new main bearing cap bolts and torque them to the manufacturer's specifications in the correct sequence to ensure even clamping.

Service Note

When replacing main bearings, it is essential to inspect the crankshaft for straightness, runout, and surface finish, and to clean all oil passages thoroughly.