CATUndercarriage

1145609 Main Bearing Set — Cat 315 315B

This is a main bearing set, essential for supporting the rotating crankshaft within the engine block and maintaining proper oil clearance. Manufactured with precision materials and tolerances, these bearings ensure smooth rotation and minimal friction, unlike worn bearings that may have excessive clearance or scoring. Operators might observe a knocking or rattling sound from the engine, a drop in oil pressure, or a general loss of engine power when main bearings fail.

Main Bearing Set – Part No 1145609 – CAT Spare Part
Part Specifications
BrandCAT
CategoryUndercarriage
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

Cross-reference part number with serial number before ordering to confirm fitment. Keep original parts until new ones are confirmed correct. Record part numbers replaced for future reference.

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
MaterialTri-metal alloy
ApplicationEngine crankshaft support
Service LifeReplace during engine overhaul or based on wear
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early signs of main bearing wear include a deep knocking sound that increases with engine RPM. As wear progresses, oil pressure may drop significantly, and the engine may run rough or lose power. Severe wear can lead to crankshaft seizure, causing immediate engine stoppage and potential internal damage.

Installation Tip

Ensure the crankshaft journals and bearing surfaces are meticulously clean and free of any debris before installing the new bearings. Never reuse old bearing shells or attempt to install bearings with improper clearance, as this can lead to rapid failure.

Service Note

Inspect the crankshaft for straightness and surface finish, and check connecting rod bearings for wear and proper clearance.