CATBearing & Bushing

3601978 Main Bearing Set — Cat 120M 120M 2

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 stringent OEM material and dimensional tolerances, ensuring superior wear resistance compared to a worn or damaged bearing. Operators may notice a knocking or rattling sound from the engine, increased oil consumption, or a loss of oil pressure when these bearings begin to fail.

Main Bearing Set – Part No 3601978 – 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 Set
MaterialSteel alloy with babbitt overlay
ApplicationEngine crankshaft support
Service LifeReplace every 5,000-10,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of main bearing failure often include a persistent knocking or rumbling noise emanating from the engine, particularly under load. If left unaddressed, this noise will intensify, and oil pressure may begin to drop, leading to increased wear on other engine components. Continued operation with failing main bearings risks severe engine damage and costly repairs.

Installation Tip

Ensure the crankshaft journals are meticulously cleaned and inspected for any imperfections before installation. Avoid overtightening the bearing caps, as this can distort the bearing and compromise oil clearance.

Service Note

Inspect the crankshaft journals for scoring or wear, and check connecting rod bearings for signs of damage.