CATBearing & Bushing

1566977 Main Bearing Set — Cat 302

This is a main bearing set designed to provide critical lubrication and support for the crankshaft within the engine's rotating assembly. It is manufactured to meet rigorous OEM standards, ensuring superior wear resistance and load-bearing capacity compared to a worn or damaged bearing. Failure of these bearings typically manifests as a distinct knocking or rumbling noise from the engine, accompanied by a significant drop in oil pressure and potential engine performance issues.

Main Bearing Set – Part No 1566977 – 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
ApplicationEngine crankshaft support
Service LifeReplace based on engine overhaul schedule
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of main bearing failure include a low-frequency knocking sound that increases with engine RPM. If ignored, this noise will become more pronounced, leading to a significant loss of oil pressure and potential engine overheating. Continued operation risks severe crankshaft and block damage.

Installation Tip

Ensure the crankshaft and bearing surfaces are meticulously clean before installation, as even microscopic debris can compromise the new bearings. Avoid mixing up the upper and lower bearing shells, as they are designed for specific positions.

Service Note

Always inspect the crankshaft journals for scoring or wear and measure bearing clearances when replacing main bearings.