CATCooling System

4n2572 Spider As-Fan — Cat 3126B 3176B

This part is a fan spider, which serves as the central hub for attaching the fan blades to the engine's drive pulley or water pump shaft in the cooling system. Manufactured to meet rigorous quality standards, it offers superior strength and balance compared to a worn or cracked spider. Operators may notice increased engine temperature, unusual fan noise, or excessive vibration from the fan assembly if this component fails.

Spider As-Fan – Part No 4n2572 – 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 drive
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The initial symptom of a failing fan spider might be a slight wobble or vibration in the fan assembly, possibly accompanied by increased fan noise. If the spider continues to degrade, the fan may become unbalanced, leading to inefficient cooling and potential damage to the fan blades or drive components. A complete failure can result in the fan detaching, causing immediate loss of cooling and potential damage to surrounding engine parts.

Installation Tip

Ensure the fan blades are correctly oriented and balanced before tightening the spider mounting bolts. Do not reuse old hardware; use new bolts and washers as specified.

Service Note

Inspect the fan belt, tensioner, and radiator for any signs of damage or wear when replacing the fan spider.