CATBearing & Bushing

2333786 Main Bearing Set — Cat 312D2 312D2 GC

This is a set of main crankshaft bearings designed to maintain the precise clearance and lubrication for the engine's crankshaft. Manufactured to meet stringent OEM standards, these bearings ensure smooth rotation and prevent premature wear, unlike worn bearings that exhibit scoring and increased play. Operators may notice a knocking sound from the engine, a significant drop in oil pressure, or a general loss of engine power when these bearings begin to fail.

Main Bearing Set – Part No 2333786 – 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-backed babbitt
ApplicationEngine crankshaft main journals
Service LifeReplace based on engine overhaul schedule
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of main bearing failure may include a persistent knocking sound from the engine, particularly under load. If ignored, the knocking will become louder and more frequent, accompanied by a noticeable decrease in oil pressure. Continued operation risks severe crankshaft and engine block damage.

Installation Tip

Ensure the crankshaft and bearing journals are meticulously clean before installation to prevent debris from causing immediate damage. Avoid mixing bearing halves from different sets or reusing old bearings.

Service Note

Always inspect the crankshaft journals for any signs of scoring or wear, and check connecting rod bearings for damage when replacing main bearings.