CATBearing & Bushing

7C6963 Main Bearing — Cat 320B

This is a precision-engineered main bearing that supports the crankshaft, essential for the engine's rotational integrity and efficiency. Manufactured to meet rigorous OEM material and dimensional standards, it provides reliable performance and longevity, surpassing worn or damaged components. Operators might observe a distinct knocking or rattling sound from the engine, particularly at lower RPMs, and a possible reduction in oil pressure as indicators of a failing bearing.

Main Bearing – Part No 7C6963 – 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 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 worn main bearing may first manifest as a deep, rhythmic knocking sound that becomes louder with increased engine load and RPM. If ignored, this can lead to severe damage to the crankshaft journals and potentially affect the connecting rod bearings. Continued operation risks significant internal engine damage.

Installation Tip

Ensure the crankshaft journals and the bearing bores in the engine block are impeccably clean and free of any debris or oil film before installation. Do not mix bearing shells from different sets; use only the matched set provided.

Service Note

Inspect the crankshaft journals for wear and ensure the oil pump is delivering adequate pressure.