Fan Motor 708-7W-00021 for Komatsu Dozer

Product Overview

708-7W-00021 hydraulic cooling fan motor is a direct OEM interchange spare part specially engineered for Komatsu D65 and D85 series bulldozers, compatible with D65EX-15, D65PX-15, D65WX-15, D85EX-15, D65EX-16 and D65WX-16 models.As the core heat dissipation component of bulldozer hydraulic cooling system, it adopts advanced electro-hydraulic proportional variable speed control structure. It can real-time sense the temperature of engine coolant and hydraulic oil, automatically adjust fan rotation speed to regulate radiator airflow volume, effectively avoid overheating alarm and unexpected machine shutdown under long-time heavy-load dozing, mining and land leveling operations.

Product Highlights

✅ Intelligent Electro-Hydraulic Variable Speed Temperature Control

Built-in DC12V proportional solenoid valve realizes stepless fan RPM adjustment based on real-time machine temperature. It balances cooling efficiency and fuel consumption automatically, protecting engine and hydraulic core parts from permanent high-temperature damage during long heavy-duty dozing work.

✅ 100% OEM Matching Plug-and-Play Installation

All mounting flange size, hole layout, spline output shaft and oil port positions are consistent with original Komatsu factory standards. No drilling, cutting or pipeline refitting needed; complete on-site replacement within 30 minutes to reduce machine downtime and maintenance labor cost.

✅ Reinforced Anti-Corrosion & Anti-Leakage Heavy-Duty Structure Thickened high-strength cast iron housing with anti-rust coating, matched with multi-layer high-temperature fluorine rubber composite oil seals and built-in dust-proof rings. Effectively resist hydraulic oil leakage, mud and dust erosion in mining and earthmoving harsh working environments.

✅ Precision Dynamic Balanced Internal Assembly, Low Vibration & Low Noise

Internal pistons, valve plates and bearings are precision ground and dynamically balanced during assembly. It delivers smooth stable rotation with low vibration and running noise, avoiding abnormal abrasion of fan hub and radiator caused by unbalanced operation.

✅ Triple Strict Factory Quality Inspection Before Shipment

Every fan motor passes three complete professional tests: 20MPa 30-minute pressure holding leakage test, 2-hour full-load continuous aging test, and linear speed regulation calibration test. All defective products are eliminated to lower after-sales failure rate greatly.

✅ Dual Supply Options: Brand New & Remanufactured Units

Two versions available to meet different customer budget demands. Remanufactured models retain intact original shell while all vulnerable internal wear parts are replaced with brand-new precision accessories, performance close to OEM new parts with more competitive price.

✅ Wide Compatibility For Komatsu D65 & D85 Series Bulldozers

Perfectly fits mainstream dozer models D65EX-15, D65PX-15, D65WX-15, D85EX-15, D65EX-16 and D65WX-16. One fan motor assembly covers multiple common machine types, easy spare parts inventory management for repair shops.

✅ Stable High Torque Output For Continuous Heavy-Load Operation

Optimized variable displacement piston structure provides steady high torque output under rated working pressure. It maintains consistent cooling airflow effect without speed drop or stalling during long-time full-load pushing and grading operations.

✅ Effectively Extend Whole Machine Service Life

Stable and efficient heat dissipation keeps cooling system operating within standard temperature range, slowing aging of engine seals, hydraulic hoses and rubber components, cutting long-term machine maintenance frequency and spare parts replacement cost.

✅ Complete Global After-Sales Warranty & Flexible Shipping Support

Comes with a 6-month global quality warranty for non-artificial damage. Multiple shipping ways including sea freight, air freight and international express are supported, mass stock enables fast 1-3 working days shipment after payment. Tiered wholesale discount is offered for bulk orders.

Condition: Brand new

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