Hydraulic Pump 708-7W-00020 Fan Motor Komatsu

Product Overview

708-7W-00020 hydraulic fan motor is OEM heavy-duty cooling replacement part specially engineered for Komatsu D275A-5D heavy bulldozer.

Serving as the core power unit of the bulldozer radiator cooling loop, this electro-proportional hydraulic fan motor dynamically adjusts fan rotational speed according to real-time fluctuations of engine coolant and internal hydraulic oil temperatures. It delivers reliable and powerful heat dissipation during long-duration land grading, open-pit mine pushing operations, large-scale roadbed construction and heavy-duty earthmoving assignments. Adaptive speed regulation prevents engine thermal overload when the dozer works continuously on rough mine terrain, meanwhile cutting redundant fuel consumption by lowering fan output during stationary standby phases.

Product Highlights

✅ Bulldozer-Oriented Proportional Speed Control

Heavy-duty built-in DC12V proportional solenoid achieves smooth stepless fan speed adjustment. Fan speed rises to boost heat dissipation during intensive earth-pushing work, and drops while the bulldozer is idling, which reduces unnecessary power draw from the engine and optimizes long-term fuel economy.

✅ Exact OEM Mounting Compatibility

Reinforced mounting flanges, robust port threading and precision-cut shaft splines perfectly fit the factory mounting positions of D275A-5D. No on-site frame cutting or hydraulic pipeline alteration is required during replacement, greatly shortening costly downtime at remote construction and mine sites.

✅ High-Impact Resistant Cast Iron Housing

Extra-thick alloy cast iron shell buffers intense mechanical shocks generated by dozer blade impacts and bumpy off-road travel. It effectively avoids housing fractures and loosening of delicate internal hydraulic components through long harsh working cycles.

✅ Advanced Multi-Layer Dust and Mud Sealing

Stacked premium fluorine rubber oil seals together with enlarged external dust gaskets keep rocky grit, dry mine dust and construction mud away from internal structures, slowing seal degradation in windy quarry zones, muddy foundation sites and unpaved mine roads.

✅ Rigorous Multi-Step Factory Quality Checks

All finished products undergo 22MPa 30-minute pressure holding leak inspection, linear speed calibration and long-duration full-load aging trials. Potential manufacturing defects are eliminated before shipment to lower recurring field maintenance expenditure.

✅ Dual Procurement Solutions

Brand-new factory-spec motors satisfy strict maintenance requirements of large mining and infrastructure enterprises; remanufactured variants replace all worn internal hydraulic components thoroughly, delivering prominent cost benefits for bulk warehouse stocking.

✅ Purpose-Built Single-Model Fit

Customized dimensional parameters achieve perfect installation matching exclusively for D275A-5D, removing risks of mounting deviation and post-install leakage.

✅ Dynamically Balanced Internal Rotor Structure

Internally rotating components undergo professional dynamic balancing treatment to suppress vibration and operational noise, offering steady protection for radiator fins and surrounding hydraulic pipelines across rough work terrain.

✅ Prolong Overall Hydraulic System Lifespan

Consistent thermal regulation stabilizes the operating temperature of the bulldozer's large engine and key hydraulic assemblies, decelerating aging of internal pump parts, rubber hoses and peripheral sealing fittings under round-the-clock heavy pushing workloads.

✅ Reliable Cross-Border Shipping Adaptability

Shock-absorbing industrial packaging performs well during sea, air and global express transportation. Tiered discounts are available for bulk orders, backed by standardized 6-month worldwide warranty that does not cover man-made damage and faulty installation.

Condition: Brand new

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