Hydraulic Pump 708-1W-02271 Fan Motor Komatsu

Product Overview

708-1W-02271 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-Focused Proportional Speed Regulation

Robust built-in DC12V proportional solenoid delivers seamless stepless speed adjustment. Fan output rises during heavy-load mine haul trips for stronger cooling, and reduces rotation during empty journeys and idle intervals, lowering wasted engine power and improving long-term fuel efficiency.

✅ OEM-Precise Mounting Dimensions for Dual Truck Versions

Reinforced mounting flanges, heavy-duty port threads and accurately machined shaft splines perfectly fit the factory mounting cavities of HM400-3 and HM400-5. No frame cutting or hydraulic pipe rework is required on-site, effectively shortening vehicle downtime at isolated mining job sites.

✅ Shock-Resistant Thick Cast Iron Casing

Integrated extra-thick alloy cast iron shell buffers continuous bumps from rough mine haul roads plus vibration from repeated loading operations. It prevents housing cracks and loosening of delicate internal hydraulic elements throughout lengthy harsh transportation cycles.

✅ Multi-Resistance Seal Design for Mine Road Conditions

Layered premium fluorine rubber seals together with enlarged outer dust gaskets intercept abrasive mine dust, hard rock grit and sticky pit mud. Seal wear slows considerably on dry dusty haulways, muddy quarry routes and rainy seasonal construction roads.

✅ Strict Multi-Step Pre-Delivery Quality Control

All finished motors pass 22MPa pressure retention leak checks, fine rotational speed calibration and prolonged full-load aging trials. Hidden manufacturing flaws get filtered out beforehand to cut recurring roadside maintenance expenses.

✅ Dual Flexible Procurement Selections

Brand-new factory-standard units satisfy strict maintenance specifications of large mining enterprises; remanufactured products fully replace all worn internal hydraulic components to bring prominent cost advantages for bulk warehouse stocking.

✅ Dual-Model Compatibility to Simplify Inventory

Only one spare SKU is applicable to HM400-3 and HM400-5, decreasing the total amount of stocked spare parts, simplifying warehouse sorting and lowering locked-up inventory capital.

✅ Dynamically Balanced Internal Rotor Assembly

Large-sized rotating inner parts are treated with professional dynamic balancing procedures to minimize vibration and running noise, providing stable protection for bulky radiator fins and surrounding heavy hydraulic pipelines over bumpy off-road routes.

✅ Extend Service Life of Entire Truck Hydraulic Circuits

Stable thermal control keeps large-displacement engines and major hydraulic assemblies within optimal temperature ranges, slowing degradation of pump internals, thick rubber hoses and peripheral seals amid nonstop heavy haulage workloads.

✅ Global-Friendly Bulk Shipping Solution

Durable shockproof industrial packaging adapts to sea freight, air delivery and international express services. Gradient bulk purchase discounts are available, covered by unified 6-month global warranty excluding man-made damage and faulty installation.

Condition: Brand new

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