CATEngine Parts

123-8905-123-8906 — Tapered Roller Bearing 123 8905

This is a set of tapered roller bearings, crucial for supporting heavy radial and axial loads within the loader's drivetrain or axle assemblies. Manufactured to meet stringent OEM quality standards, these bearings ensure smooth rotation and reduced friction, unlike worn bearings that can cause excessive play and heat. Operators may notice increased noise from the wheel or drivetrain area, vibration, or difficulty steering when these bearings begin to fail.

Tapered Roller Bearing 123 8905 – Part No 123-8905-123-8906 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
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

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeTapered Roller Bearing Set
MaterialCase-hardened steel
ApplicationWheel Hub, Axle, or Transmission
Service LifeReplace based on wear or 4,000-6,000 hours
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first symptom of failing tapered roller bearings is often an audible grinding or humming noise originating from the wheel or axle area, which may increase with speed. If ignored, the noise will intensify, accompanied by noticeable vibration and potential looseness in the wheel or drivetrain, leading to uneven tire wear and compromised steering control. The ultimate consequence is bearing seizure, potentially damaging the axle or hub and causing a loss of mobility.

Installation Tip

Ensure that both the inner and outer bearing races are properly seated and that the bearing is correctly preloaded according to the service manual specifications. Do not attempt to install bearings without proper tools, as this can damage the bearing or its housing.

Service Note

Always replace the associated axle seals and inspect the wheel hub and axle shaft for any scoring or wear when replacing tapered roller bearings.