CATUndercarriage

420-9801 Track Roller — Cat 239D 249D

This track roller is a critical component of the undercarriage system, designed to support the weight of the machine and guide the track chain. It is manufactured to meet stringent quality standards, ensuring durability and smooth operation compared to a worn roller that can exhibit excessive play and surface degradation. Operators may notice increased vibration, unusual noises from the undercarriage, or premature track wear when a track roller begins to fail.

Track Roller – Part No 420-9801 – CAT Spare Part
Part Specifications
BrandCAT
CategoryUndercarriage
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

Cross-reference part number with serial number before ordering to confirm fitment. Keep original parts until new ones are confirmed correct. Record part numbers replaced for future reference.

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

Part TypeTrack Roller
MaterialForged steel
ApplicationUndercarriage system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing track roller is often an audible grinding or squealing noise originating from the undercarriage. If ignored, the roller can seize or develop excessive play, leading to uneven track tension and potential track derailment. Continued operation with a damaged roller significantly increases wear on other undercarriage components and can compromise machine stability.

Installation Tip

Ensure the mounting surface on the undercarriage is clean and free of debris before installing the new roller. Avoid overtightening the mounting bolts, as this can strip threads or damage the roller's sealing mechanism.

Service Note

Inspect the track chain, idlers, and sprockets for wear and damage when replacing a track roller.