CATEngine Parts

179-9778 Hydraulic Fan Motor — Cat M325C 325C

This is a hydraulic fan motor that drives the cooling fan for the engine and hydraulic systems. It is engineered for precise speed control and high torque output, ensuring efficient heat dissipation, unlike a worn motor that causes sluggish fan speed. Operators may notice increased engine or hydraulic oil temperatures, or hear the fan running at inconsistent speeds when this motor begins to fail.

Hydraulic Fan Motor – Part No 179-9778 – 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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Engine Parts Component

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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 TypeHydraulic Fan Motor
MaterialSteel, Aluminum
ApplicationEngine/Hydraulic Cooling Fan Drive
Service LifeReplace as needed based on performance
CompatibilityCAT specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of a failing hydraulic fan motor is often a noticeable drop in fan speed or erratic fan operation. If ignored, this leads to insufficient cooling, causing engine and hydraulic oil temperatures to rise above normal operating ranges. The ultimate consequence is potential damage to engine components or hydraulic system seals due to overheating.

Installation Tip

Ensure the hydraulic lines are properly flushed before connecting them to the new motor to prevent contamination. Do not overtighten the mounting bolts, as this can warp the motor housing.

Service Note

Inspect the cooling fan blades for damage and the fan shroud for obstructions when replacing the hydraulic fan motor.