Hydraulic Pump 708-1W-02261 Fan Motor Komatsu

Product Overview

708-1W-02261 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

✅ Haul-Tailored Proportional Speed Control

Heavy-duty built-in DC12V proportional solenoid offers smooth stepless speed adjustment. Fan power ramps up to boost cooling during heavy payload transportation, and lowers rotation speed during empty transit and idle downtime, reducing parasitic power loss and elevating overall fuel economy for long haulage shifts.

✅ Perfect OEM Mount Dimensions for Two Truck Models

Strengthened mounting flanges, sturdy port threading and precision-machined shaft splines precisely fit the factory installation slots of HM400-3 and HM400-5. No on-site metal cutting or hydraulic pipeline remodeling is required, greatly shortening vehicle downtime at remote mining yards.

✅ Vibration-Resistant Reinforced Cast Iron Housing

Monolithic extra-thick alloy cast iron casing absorbs constant bumps from uneven mine haul roads as well as vibration from repetitive bucket loading. It avoids housing cracks and loosening of delicate internal hydraulic components through lengthy harsh transportation cycles.

✅ Heavy-Duty Sealing Against Harsh Haul Conditions

Stacked premium fluorine rubber oil seals paired with oversized outer dust gaskets block gritty mine dust, rocky debris and sticky pit mud. Seal degradation is notably slowed down on dusty mine roads, muddy quarry routes and wet seasonal construction haulways.

✅ Multi-Round Factory Quality Screening

All finished units pass rigorous 22MPa pressure retention leak inspections, fine speed calibration and prolonged full-load aging trials. Potential manufacturing defects get eliminated before shipment to reduce frequent costly field repairs.

✅ Two Versatile Procurement Options

Brand-new factory-spec motors meet strict maintenance criteria of large-scale mining corporations; remanufactured variants fully replace worn internal core hydraulic components, delivering outstanding cost advantages for bulk inventory stocking.

✅ Dual-Model Compatibility to Simplify Stock

One single spare part works for HM400-3 and HM400-5 both, cutting down your spare part SKU quantity, streamlining warehouse classification and lowering capital tied up in inventory.

✅ Dynamically Balanced Internal Rotor Structure

Large rotating inner components are processed via professional dynamic balancing technology to suppress vibration and operational noise, delivering steady protection for bulky radiator fins and adjacent heavy hydraulic pipelines during bumpy off-road trips.

✅ Prolong Overall Hydraulic System Service Life

Precise thermal regulation holds engine and key hydraulic assemblies within ideal working temperature bands, slowing the aging of pump internals, heavy rubber hoses and peripheral seals under continuous high-load hauling tasks.

✅ Optimized Logistics for Cross-Border Bulk Orders

Robust shock-resistant industrial packaging adapts well to sea freight, air cargo and worldwide express shipping. Tiered bulk discounts are available, backed by standardized 6-month global warranty terms excluding human-inflicted damage and incorrect installation.

Condition: Brand new

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