CATUndercarriage

2W8476 Gear As- Idler — Cat 120H 120H es

This is an idler gear assembly for the undercarriage system, designed to guide and maintain tension on the track. It is manufactured to meet stringent quality standards, ensuring durability and performance comparable to original equipment, unlike worn components that exhibit excessive play and noise. Operators may notice increased track slack, abnormal grinding sounds, or premature track wear when this component begins to fail.

Gear As- Idler – Part No 2W8476 – 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 TypeIdler Gear Assembly
MaterialForged Steel
ApplicationUndercarriage Track System
Service LifeReplace based on wear inspection, typically 2,000-4,000 hours
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of idler gear failure include increased noise from the undercarriage and a noticeable looseness in the track. If ignored, this can lead to accelerated wear on other undercarriage components and potential track derailment. Continued operation with a failing idler poses a significant risk of unscheduled downtime and costly repairs.

Installation Tip

Ensure the mounting surfaces are clean and free of debris before installation to prevent leaks and ensure a proper seal. Avoid overtightening mounting bolts, as this can damage the threads or the component housing.

Service Note

Inspect track rollers, recoil springs, and track chains for wear and damage when replacing the idler gear assembly.