CATBearing & Bushing

4D3151 Roller A. Bearing — Cat 621 621b

This is a roller bearing designed to handle heavy radial loads in applications like wheel hubs or pivot points. It is manufactured to meet stringent OEM quality standards, offering superior load-carrying capacity and longevity over a worn bearing with flattened rollers. Operators may observe increased play, noise, or binding in the affected component when this bearing begins to fail.

Roller A. Bearing – Part No 4D3151 – 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 TypeRoller Bearing
MaterialHardened Steel
ApplicationWheel Hub or Pivot Point
Service LifeReplace based on inspection or 2,000-4,000 hours
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

Early indications of failure include a distinct humming or grinding noise and noticeable looseness in the wheel or pivot. If ignored, the bearing can disintegrate, leading to severe damage to the shaft and housing. Continued operation risks component seizure and potential loss of control.

Installation Tip

Ensure the bearing seat in the housing and the shaft are perfectly clean and free of burrs before fitting the new bearing. Never use a hammer to drive the bearing into place; use a proper press or driver tool.

Service Note

Inspect the wheel hub or pivot shaft and housing for any signs of scoring or deformation during bearing replacement.