CATEngine Parts

094-6377 Coupling Assy — Cat 3306

This is a Coupling Assembly, designed to connect the engine crankshaft to the transmission or hydraulic pump, transmitting rotational power smoothly. It is engineered with specific dampening characteristics to absorb torsional vibrations and meet rigorous durability standards, unlike a worn coupling that may cause rough power transfer. Operators might experience shuddering during acceleration, clunking noises when engaging the drivetrain, or a complete loss of power transmission if this assembly fails.

Coupling Assy – Part No 094-6377 – 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 Coupling Assembly
MaterialRubber, steel
ApplicationEngine to transmission/pump drive
Service LifeTypically 5,000-10,000 hours, depending on load and vibration
CompatibilityCAT 3306, E300, EL300
ConditionNew — OEM specification

Failure Symptoms

The first symptom of a failing coupling assembly is often a noticeable vibration or shudder when the engine is under load. As the wear progresses, you may hear clunking or knocking sounds, especially when shifting gears or engaging the drive. Complete failure will result in a sudden loss of power transmission between the engine and the drivetrain.

Installation Tip

Ensure the engine and driven component shafts are properly aligned before installing the new coupling to prevent premature wear. Do not use excessive force to seat the coupling; it should slide into place with appropriate alignment.

Service Note

When replacing the coupling assembly, inspect the engine crankshaft and the input shaft of the transmission or pump for any signs of damage or excessive wear.