Product Description
Hydraulic Fan Pump 200-3406 for Caterpillar 325C & 322C FM Excavators
Product Overview: The 200-3406 (2003406) Hydraulic Fan Pump is the essential power component for maintaining the cooling efficiency of Caterpillar 325C and 322C FM series excavators. Specifically engineered to handle the extreme thermal loads of forestry operations (FM series) and heavy-duty excavation, this pump serves as the heart of the cooling system. It precisely regulates flow to the hydraulic fan motor based on engine load and ambient temperatures, ensuring the radiator operates at peak performance.
Key Technical Advantages:
Precise OEM Compatibility: Manufactured to strict Caterpillar standards, serving as a direct replacement for part number 200-3406, ensuring seamless integration with 325C and 322C FM hydraulic circuits.
Superior Thermal Management: Provides stable pressure output even under extreme heat and heavy loads, preventing engine overheating and extending the overall service life of the machine.
Heavy-Duty Construction: Built with reinforced internal gears and bearings, offering exceptional shock resistance and fatigue strength to endure high-frequency hydraulic fluctuations.
Enhanced Fuel Efficiency: High volumetric efficiency (reaching over 93%) minimizes hydraulic power loss, contributing to better fuel economy for the entire excavator.
Target Applications: Caterpillar 325C Excavator, 325C L, 322C, 322C FM (Forestry Machine), and their respective coolant circulation systems.
Detailed Models & Parameters:
Product Name: Hydraulic Fan Pump.
Part Numbers: 200-3406, 2003406.
Compatible Models: Caterpillar 325C, 325C L, 322C, 322C FM Excavators.
Engine Compatibility: Fully compatible with CAT 3126B / C7 engine systems utilized in these models.
Material & Build: Features a reinforced body with high-precision axial compensation structures for reliable long-term operation.



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