Fan Motor 708-7W-00140 for Komatsu Dozer

Product Overview

708-7W-00140 hydraulic cooling fan motor is a direct OEM interchange heat dissipation spare part exclusively engineered for Komatsu D155 and D275 series large bulldozers, perfectly compatible with D155AX-6, D155A-6, D275AX-5 and D275A-5 models.

As the core cooling component of the bulldozer hydraulic system, it adopts advanced electro-hydraulic proportional variable speed control structure. It can real-time detect the temperature of engine coolant and hydraulic oil, and automatically adjust fan rotation speed to regulate radiator airflow volume, effectively avoiding overheating alarms and unexpected machine shutdowns during long-hour heavy-load dozing, mining and land leveling construction 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 engine and hydraulic oil temperature. It balances cooling efficiency and fuel consumption automatically, effectively protecting core engine and hydraulic parts from permanent high-temperature damage during long heavy-duty dozing work.

✅ 100% OEM Matching Plug-and-Play Installation

All mounting dimensions, flange hole layout, spline output shaft and oil port positions are identical to original Komatsu factory specifications. No cutting, drilling or pipe refitting required; complete on-site replacement can be finished within 30 minutes to cut machine downtime and maintenance labor cost.

✅ Reinforced Anti-Corrosion & Anti-Leakage Heavy-Duty Structure

Adopts thickened high-strength cast iron housing with anti-rust surface coating, matched with multi-layer high-temperature fluorine rubber composite oil seals and built-in dust-proof rings. It perfectly resists hydraulic oil leakage, dust and mud erosion in mining, earthmoving and other harsh construction environments.

✅ Precision Balanced Internal Assembly, Low Vibration & Low Noise

Internal piston, valve plate and bearing components are precision ground and dynamically balanced before assembly. It delivers smooth stable rotation with low vibration and running noise, avoiding abnormal wear of fan hub and radiator caused by unbalanced operation.

✅ Triple Strict Factory Quality Inspection Before Shipment

Every fan motor passes three 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 greatly reduce after-sales failure rate.

✅ Dual Supply Options: Brand New & Remanufactured Units

We provide two versions to match different customer budget demands. Remanufactured models retain intact original shell while all vulnerable internal wear parts are replaced with brand-new precision accessories, with performance close to OEM new parts at a much lower cost.

✅ Wide Compatibility For Komatsu D155 & D275 Series Bulldozers

Fully compatible with mainstream dozer models including D155AX-6, D155A-6, D275AX-5 and D275A-5. One fan motor assembly covers multiple common large dozer machine types, convenient for spare parts inventory management of repair shops and construction fleets.

✅ High Torque Stable Output For Continuous Heavy-Load Operation

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

✅ Extend Overall Machine Service Life

Stable and effective heat dissipation keeps the whole cooling system working within standard temperature range, reducing aging speed of engine seals, hydraulic hoses and rubber components, lowering 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 against non-artificial damage. We support multiple shipping methods including sea freight, air freight and international express, with mass stock for fast 1-3 working days shipment after payment. Tiered wholesale discount is available for bulk orders.

Condition: Brand new

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