CATBearing & Bushing

8N8975 Bearing — Cat

This non-grooved front main engine bearing is essential for supporting the crankshaft and maintaining precise clearances within specific Caterpillar engines. It is manufactured to meet stringent OEM standards, providing optimal lubrication and load-bearing capacity, unlike a worn bearing that would allow excessive crankshaft movement and oil pressure loss. Operators may notice a rougher engine idle, increased engine noise, or a gradual decrease in oil pressure if this bearing begins to fail.

Bearing – Part No 8N8975 – 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 Engine Bearing (Non-Grooved, Front)
MaterialSteel-backed Babbitt alloy
ApplicationEngine Crankshaft Front Main Journal
Service LifeReplace during engine overhaul or based on inspection
CompatibilityCAT 3208, 3208T Engines
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early signs of failure may include a slight increase in engine noise or a subtle roughness during idle. If left unaddressed, this can progress to noticeable oil pressure loss and increased wear on the crankshaft journal. Continued operation risks significant engine damage and potential mechanical failure.

Installation Tip

Carefully inspect the crankshaft front journal for any signs of wear, scoring, or out-of-roundness before installing the new bearing. Ensure the bearing is correctly oriented and seated flush in the housing.

Service Note

When replacing the front main bearing, it is crucial to inspect the crankshaft thrust surfaces and the rear main bearing for wear.