CATEngine Parts

139-4304 Sprocket — Cat 3003 301

This heavy-duty sprocket is a crucial component in the drive system, transferring power from the final drive to the track or tire. It is precision-machined from hardened steel to resist wear and ensure optimal engagement with the drive chain or tire lugs, unlike a worn sprocket which exhibits rounded teeth and poor engagement. Operators may experience track slippage, excessive vibration, or unusual noises from the drive system when a sprocket is worn or damaged.

Sprocket – Part No 139-4304 – 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 TypeDrive Sprocket
MaterialHardened Steel
ApplicationDrive System
Service LifeReplace based on wear inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a worn sprocket is often increased noise and vibration from the drive system, along with potential track or tire slippage. If the wear progresses, engagement with the track or tire will become significantly compromised, leading to inefficient power transfer and accelerated wear on other drivetrain components. Continued use with a severely worn sprocket can lead to derailment or damage to the drive mechanism.

Installation Tip

Ensure the mounting surface on the final drive hub is perfectly clean and free of any rust or old sealant before installing the new sprocket. Avoid reusing old mounting bolts; always use new, correctly specified hardware to ensure secure attachment.

Service Note

Inspect the drive chains or tires for wear, and check the final drive gears and seals for any signs of damage or leakage.