CATUndercarriage

1145611 Main Bearing Set — Cat 315 315B

This Main Bearing Set is essential for the proper lubrication and rotational support of the engine's crankshaft. Manufactured to meet rigorous OEM quality standards, these bearings provide a smooth, low-friction surface crucial for engine longevity, unlike worn bearings that exhibit scoring and material transfer. Operators may notice increased engine noise, particularly knocking sounds, a drop in oil pressure, or visible smoke from the exhaust if these bearings begin to fail.

Main Bearing Set – Part No 1145611 – 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
MaterialTri-metal alloy (Steel-backed overlay)
ApplicationEngine Crankshaft Main Journals
Service LifeReplace during engine overhaul or if wear is detected
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

Early failure may present as a faint knocking sound from the engine that intensifies with RPM. If ignored, this can progress to severe engine noise, a significant drop in oil pressure, and potential crankshaft damage. Continued operation risks catastrophic engine failure due to lack of lubrication and support.

Installation Tip

Thoroughly clean the crankshaft journals and bearing saddles to remove all traces of old material and oil. Never mix old and new bearings, and ensure correct orientation for each half.

Service Note

Inspect crankshaft journals for scoring or out-of-roundness, and check oil pump pressure when replacing main bearings.