CATBearing & Bushing

1969519 Main Bearing — Cat 120H 120H ES

This is a main bearing set, critical for supporting the crankshaft and ensuring proper lubrication within the engine's rotating assembly. Manufactured to meet stringent Caterpillar standards, it provides superior wear resistance and load-bearing capacity compared to a worn set that would exhibit increased friction and oil pressure loss. Operators may notice a drop in oil pressure, increased engine noise, or knocking sounds when this bearing set begins to fail.

Main Bearing – Part No 1969519 – 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 Set
MaterialTri-metal Alloy (Steel-Alloy-Babbitt)
ApplicationEngine Crankshaft Support
Service LifeReplace during engine overhaul or based on inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The first indication of failure is often a noticeable drop in engine oil pressure, especially at higher RPMs. If ignored, this can progress to audible engine knocking or rattling sounds as the crankshaft develops excessive play. Continued operation risks severe crankshaft and block damage, leading to a complete engine failure.

Installation Tip

Ensure the crankshaft journals and bearing bores are meticulously cleaned and inspected for any imperfections before installation. Never mix old and new bearings; always install a complete, matched set.

Service Note

Inspect the crankshaft journals for wear, scoring, or out-of-roundness, and check the oil pump and oil filter for any signs of debris.