CATCooling System

4n3339 Spider As-Fan — Cat 3406 3408

This spider assembly is a crucial part of the engine's cooling fan drive system, ensuring the fan rotates at the correct speed to provide adequate airflow for cooling. Manufactured to high standards, it offers reliable performance and durability, outlasting worn or broken original parts. Operators may notice increased fan noise, vibration, or a decrease in cooling efficiency if this component begins to fail.

Spider As-Fan – Part No 4n3339 – CAT Spare Part
Part Specifications
BrandCAT
CategoryCooling System
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

Flush cooling system with distilled water before refilling. Use pre-mixed coolant — never plain water, which causes corrosion. Pressure-test system after any cooling repair. Check thermostat by immersing in hot water — should open at rated temperature.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeFan Spider Assembly
MaterialForged steel
ApplicationEngine cooling fan drive
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

Initial symptoms may include unusual noises from the fan area or increased vibration during engine operation. If the spider assembly continues to degrade, it can lead to reduced fan speed, insufficient cooling, and potentially fan detachment. Failure to address this can result in engine overheating and damage to cooling system components.

Installation Tip

Ensure the fan blades are properly balanced and securely attached to the spider before final installation. Avoid overtightening the mounting bolts, as this can strip the threads or damage the component.

Service Note

Inspect the fan clutch (if applicable) and drive belt tension when replacing the fan spider assembly.