CATUndercarriage

5i7611 Idler As — Cat 311B 311C

This idler assembly is a crucial part of the undercarriage, providing tension to the track chain and guiding its path. Manufactured to robust standards, it ensures consistent track tension and smooth rotation, unlike a worn idler that may wobble or fail to maintain proper tension. Operators may notice excessive track slack, unusual noises, or premature wear on other undercarriage components when an idler assembly is compromised.

Idler As – Part No 5i7611 – 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 Assembly
MaterialCast Steel
ApplicationUndercarriage Track Tensioning
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

An initial symptom of a failing idler assembly is often a persistent squealing or grinding noise from the front of the undercarriage. If ignored, the idler bearing can fail, leading to seizure, potential damage to the track chain, or derailment. This can result in significant downtime and costly repairs to the undercarriage system.

Installation Tip

Ensure the mounting surface is clean and free of debris, and use the correct thread locker on mounting bolts as specified. Do not overtighten the idler shaft, as this can damage the bearings.

Service Note

Inspect the track chain, front and rear track rollers, and recoil springs for wear or damage when replacing the idler assembly.