CATCooling System

4n3092 Spider As-Fan — Cat 3406

This fan spider is a crucial component of the engine's cooling system, providing the mounting structure for the fan blades to ensure proper airflow. It is manufactured to meet OEM specifications, offering superior strength and balance compared to a worn or damaged spider that may cause fan imbalance. Operators might notice increased fan noise, vibration, or a noticeable decrease in cooling efficiency if this part begins to fail.

Spider As-Fan – Part No 4n3092 – 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
MaterialCast Iron
ApplicationEngine cooling fan assembly
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing fan spider is often an unusual noise, such as wobbling or rattling, coming from the fan area. If ignored, the imbalance can worsen, leading to increased vibration and potential damage to the fan blades, radiator, or water pump. Continued operation with a compromised fan spider risks fan detachment or severe damage to the cooling system components.

Installation Tip

Ensure the mounting surfaces on both the fan spider and the water pump pulley are perfectly clean and free of any oil or debris before assembly. Do not overtighten the bolts securing the fan spider, as this can strip the threads or damage the component.

Service Note

Inspect the water pump and drive belt tension when replacing the fan spider.