CATBearing & Bushing

1011530 Main Bearing — Cat 120H 120H ES

This is a main bearing, a crucial component in the engine's rotating assembly that supports the crankshaft. Manufactured to meet high-quality standards, it provides a smooth, low-friction surface essential for engine longevity, unlike a worn bearing which can lead to increased vibration and reduced performance. Symptoms of a failing main bearing include a deep knocking sound from the engine, especially under load, a noticeable decrease in oil pressure, and potential engine overheating.

Main Bearing – Part No 1011530 – 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 Main Bearing
MaterialSteel alloy with bearing overlay
ApplicationEngine crankshaft main journals
Service LifeReplace during engine overhaul or as indicated by inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A deep, heavy knocking sound from the engine, particularly noticeable when the engine is under load, is an early indicator of main bearing failure. This can progress to a significant drop in oil pressure and increased engine vibration. Continued operation risks severe crankshaft and engine block damage.

Installation Tip

Carefully check the crankshaft journals for any signs of scoring or damage before installing new bearings. Never reuse old bearing shells, even if they appear to be in good condition.

Service Note

When replacing main bearings, it is crucial to inspect the connecting rod bearings and oil pump for wear or damage.