CATBearing & Bushing

8N8227-040 Main Bearing — Cat 3306

This is a high-quality main bearing designed to support the crankshaft, crucial for the smooth operation of the engine by minimizing friction. Manufactured to meet stringent material and dimensional standards, it provides reliable performance and durability, outperforming worn or damaged components. Operators may notice increased engine noise, such as a deep knocking sound, and a potential decrease in oil pressure as symptoms of a failing bearing.

Main Bearing – Part No 8N8227-040 – 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.

WhatsApp for Price & Availability☎ Call Mumbai Office

Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

IST.', };

Related CAT Parts

From the same category — may also be needed

4n3982
Bearing Set (2Pcs/Set)
5P2523
5P2525
1373058
Bearing
8M7208
Guard Assem. (L.H.)
1289261
Bearing
2H3822
Bearing

Browse all CAT Bearing Bushing →

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 TypeEngine Main Bearing
MaterialSteel-backed babbitt alloy
ApplicationEngine crankshaft support
Service LifeReplace during engine overhaul or as indicated by inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

A failing main bearing often begins with a low-frequency knocking sound that becomes more pronounced as engine speed increases. If left unaddressed, this can lead to significant damage to the crankshaft and connecting rod journals, potentially causing engine seizure. Continued operation risks severe internal engine damage.

Installation Tip

Carefully inspect the crankshaft journals for any signs of wear, scoring, or taper before installing new bearings. Never reuse old bearing bolts; always use new ones torqued to the manufacturer's specifications.

Service Note

Inspect the crankshaft journals for wear and ensure the oil pump is functioning correctly.