CATEngine Parts

7Y0673 Gear-Ring — Cat 320C 320D

This is a ring gear, a critical component in the final drive or differential assembly that meshes with a pinion gear to transmit torque and change rotational direction. Manufactured to precise specifications, it ensures smooth power transfer and durability, unlike a worn gear with chipped or broken teeth. Operators may experience grinding noises, loss of power to the drive wheels, or excessive play in the drivetrain when this gear is damaged.

Gear-Ring – Part No 7Y0673 – 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 TypeRing Gear
MaterialHardened forged steel
ApplicationFinal drive or differential assembly
Service LifeReplace as needed based on wear or damage
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first symptom of a failing ring gear is often a clunking or grinding noise during acceleration or deceleration, especially when turning. If ignored, the gear teeth can break further, leading to a complete loss of drive power to one or more wheels. This can immobilize the equipment and potentially cause damage to other drivetrain components.

Installation Tip

Ensure the mating surfaces for the differential case and pinion bearing are perfectly clean and free of any old gasket material or debris. Avoid overtightening the differential case bolts, as this can warp the housing and affect gear mesh.

Service Note

Inspect the pinion gear, bearings, and seals for wear or damage, and ensure the differential lubricant is clean and at the correct level.