CATCooling System

8n6584 Spider As-Fan — Cat 3408 3412

This spider assembly connects the fan to the engine's water pump or crankshaft pulley, ensuring efficient engine cooling. It is manufactured to meet stringent OEM standards, offering superior durability compared to worn or damaged original components. Operators may notice increased engine temperature, unusual fan noise, or vibration if this part begins to fail.

Spider As-Fan – Part No 8n6584 – 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
MaterialCast Iron
ApplicationEngine Cooling System
Service LifeReplace every 4,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early signs of a failing fan spider assembly include audible rattling or grinding noises from the front of the engine. If left unaddressed, the assembly can seize or break, leading to a loss of fan operation and rapid engine overheating. Continued operation with a compromised fan spider risks severe engine damage due to excessive heat.

Installation Tip

Clean the mounting surfaces thoroughly to ensure a flush fit and prevent leaks or vibration. Avoid overtightening the mounting bolts, as this can strip the threads or warp the assembly.

Service Note

Inspect the cooling fan blades for damage and the drive belt for wear and tension when replacing the fan spider assembly.