CATEngine Parts

5i7686 Gear As — Cat 311 311B

This is a CAT Gear Assembly, a critical component within the engine's timing or accessory drive system responsible for transferring rotational motion. Manufactured to meet rigorous quality standards, it offers superior wear resistance and precise tooth engagement compared to a worn or damaged gear. Operators might observe increased engine noise, particularly a whining or grinding sound, or experience issues with accessory function if this gear fails.

Gear As – Part No 5i7686 – 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 TypeGear Assembly
MaterialHardened Steel
ApplicationEngine Timing/Accessory Drive
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The first indication of a failing gear assembly is often an audible change in engine noise, such as a distinct whine or grinding sound that changes with engine speed. If ignored, the wear will progress, potentially leading to skipped teeth, loss of accessory function, or incorrect engine timing. Continued operation risks significant internal engine damage or failure of driven components.

Installation Tip

Ensure the mating gear and mounting surface are clean and free of debris before installation. Avoid forcing the gear onto its shaft; it should fit snugly but without excessive force.

Service Note

Inspect the condition of the mating gear and the drive shaft for wear or damage when replacing this gear assembly.