CATUndercarriage

1145610 Main Bearing Set — Cat 315 315B

This is a Main Bearing Set, essential for reducing friction and wear between the crankshaft and the engine block in the engine's rotating assembly. Manufactured to precise tolerances, these bearings ensure smooth crankshaft rotation and optimal oil film support, unlike worn bearings that allow metal-to-metal contact. Operators may notice increased engine noise, particularly knocking sounds, a drop in oil pressure, or visible smoke from the exhaust when main bearings are failing.

Main Bearing Set – Part No 1145610 – 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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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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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
MaterialSteel with bearing alloy
ApplicationEngine crankshaft
Service LifeReplace during engine overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of failing main bearings is often a distinct knocking or rumbling sound from the engine, especially under load. As the wear progresses, this noise intensifies, and engine oil pressure may drop significantly. Continued operation can lead to severe crankshaft and block damage, necessitating a complete engine rebuild.

Installation Tip

Thoroughly clean the crankshaft journals and the main bearing bores in the engine block to remove all debris and old oil residue. Ensure the correct oil clearance is achieved by using the specified assembly lube and torque sequence.

Service Note

When replacing main bearings, it is crucial to inspect the crankshaft for straightness and wear, and to check connecting rod bearings for damage.