CATBearing & Bushing

7W4107 Main Bearing — Cat 75C 85C

This main bearing is a critical component within the engine's crankshaft assembly, designed to reduce friction and support the rotating shaft. It is manufactured to meet stringent OEM quality standards, ensuring superior durability and performance compared to worn or damaged bearings. Operators may notice a loss of engine power, increased oil consumption, or unusual knocking sounds from the engine when this bearing begins to fail.

Main Bearing – Part No 7W4107 – 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 alloy with bearing overlay
ApplicationEngine crankshaft support
Service LifeReplace as part of engine overhaul or based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of main bearing failure may include a slight decrease in engine oil pressure or a faint knocking sound at idle. As the wear progresses, the knocking noise will become more pronounced, and engine performance will noticeably degrade. Continued operation with failing main bearings can lead to severe crankshaft damage and potential engine seizure.

Installation Tip

Ensure the crankshaft journals and bearing bores are meticulously cleaned and free of any debris before installation. Avoid using abrasive materials or improper tools that could scratch or deform the bearing surfaces during fitting.

Service Note

Inspect the crankshaft journals for scoring or wear, and check the connecting rod bearings for signs of damage or excessive play.