CATBearing & Bushing

5K8591 Bearing-Outer — Cat 128 518

This is an outer bearing designed to support rotating components and absorb radial and axial loads, typically found in wheel hubs or drive systems. Manufactured to meet rigorous OEM standards, it offers superior resistance to wear and fatigue compared to a damaged or worn bearing. Failure symptoms often include increased noise, vibration, and excessive heat in the wheel or drive assembly.

Bearing-Outer – Part No 5K8591 – 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 TypeOuter Wheel Bearing
MaterialHardened Steel
ApplicationWheel hub assembly
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of outer bearing failure include a humming or grinding noise that increases with vehicle speed, especially when turning. This can progress to noticeable vibration and excessive heat from the wheel hub. If left unaddressed, the bearing can seize, potentially leading to wheel lock-up or separation.

Installation Tip

Always ensure the wheel hub and spindle are thoroughly cleaned and free of any debris or old grease before installing the new bearing. Never reuse old seals or cotter pins.

Service Note

When replacing wheel bearings, it is essential to also inspect and replace the wheel seal and check the condition of the spindle and hub for any wear or damage.