Hydraulic Pump 708-1W-02280 Fan Motor Komatsu

Product Overview

708-1W-02280 hydraulic fan motor is OEM heavy-duty cooling replacement part specially engineered for Komatsu HM400-3 and HM400-5 articulated dump trucks.

As the core power component of radiator cooling circuits for these two heavy-duty hauling models, this electro-proportional hydraulic fan motor dynamically adjusts fan rotational speed according to real-time shifts of engine coolant and hydraulic oil temperatures. It delivers stable and powerful heat dissipation during intensive mine material haulage, quarry bulk transportation, large earthmoving projects and long-distance off-road cargo delivery. Adaptive speed regulation effectively prevents engine thermal overload under round-the-clock heavy-load transportation cycles and cuts unnecessary fuel expenditure.

Product Highlights

✅ Haulage-Optimized Proportional Speed Control

Heavy-duty built-in DC12V proportional solenoid delivers smooth stepless fan speed adjustment. Rotation speed rises to strengthen cooling during full-load mine transportation, and decreases during empty runs and idle downtime, cutting parasitic power consumption and lifting long-cycle fuel economy.

✅ Accurate OEM Mount Specs for Two Truck Models

Strengthened mounting flanges, robust port threading and precision-machined shaft splines perfectly match the factory installation positions of HM400-3 and HM400-5. No onsite frame cutting or hydraulic pipeline modification is required, greatly shortening vehicle downtime at remote mining work sites.

✅ Reinforced Vibration-Proof Cast Iron Shell

Monolithic extra-thick alloy cast iron housing absorbs repeated bumps from uneven mine haul roads and vibration from frequent loading operations. It avoids shell cracks and loosening of delicate internal hydraulic components even under long periods of rough off-road operation.

✅ High-Performance Multi-Layer Sealing

Stacked premium fluorine rubber oil seals paired with oversized outer dust gaskets block abrasive mining dust, jagged rock debris and thick pit mud. Seal degradation slows remarkably in dusty mine lanes, muddy quarry paths and wet seasonal construction routes.

✅ Multi-Stage Factory Quality Screening

All finished products pass 22MPa pressure retention leak inspection, fine rotational speed calibration and prolonged full-load aging trials. Hidden manufacturing defects get eliminated prior to shipment to reduce costly recurring field repairs.

✅ Two Practical Procurement Alternatives

Brand-new factory-spec units meet strict maintenance benchmarks of large mining operators; professionally remanufactured options fully replace worn internal hydraulic core parts, bringing prominent cost advantages for bulk warehouse stocking.

✅ Dual-Model Compatibility to Cut Inventory Pressure

A single spare part fits both HM400-3 and HM400-5, reducing the quantity of SKUs you need to stock, simplifying warehouse sorting procedures and lowering capital occupied by spare inventories.

✅ Dynamically Balanced Internal Rotor Structure

Large rotating internal components go through professional dynamic balancing processing to suppress vibration and operational noise, delivering steady protection for bulky radiator fins and adjacent heavy hydraulic pipelines over bumpy transportation routes.

✅ Prolong Overall Hydraulic System Lifespan

Precise thermal regulation keeps engines and key hydraulic assemblies within ideal working temperature ranges, slowing aging of pump internals, heavy rubber hoses and peripheral sealing fittings under continuous heavy hauling workloads.

✅ Trustworthy Cross-Border Logistics Adaptation

Sturdy shock-absorbent industrial packaging performs reliably in sea freight, air cargo and worldwide express delivery. Tiered discounts are available for bulk orders, protected by standardized 6-month global warranty excluding man-made damage and incorrect installation.

Condition: Brand new

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