Hydraulic Pump 708-1W-00902 Fan Motor Komatsu

Product Overview

708-1W-00902 hydraulic fan motor is OEM heavy-duty cooling replacement part custom-made for Komatsu motor graders including GD655-3C, GH320-3, GD555-3, GD675-3 and GD755-3.

Serving as the vital power unit of radiator cooling loops for these five grader variants, this electro-proportional hydraulic fan motor dynamically adjusts fan rotation speed following real-time shifts of engine coolant and hydraulic oil temperatures. It delivers steady and reliable heat dissipation during highway road grading, airport runway leveling, rural road maintenance, mine access road construction and large land grading projects. The adaptive speed mechanism effectively prevents engine thermal overload during all-day roadwork shifts and cuts unnecessary fuel consumption.

Product Highlights

✅ Grader-Tailored Proportional Speed Regulation

Robust built-in DC12V proportional solenoid achieves smooth stepless speed adjustment. Fan speed rises automatically under heat-generating scarifying and long-duration grading work, and reduces during travelling and idle phases, lowering parasitic power drain and improving long-term fuel economy for road construction projects.

✅ Exact OEM Installation Specs for Five Grader Versions

Reinforced mounting flanges, thickened hydraulic port threads and precision-cut shaft splines perfectly fit the factory mounting positions of GD655-3C, GH320-3, GD555-3, GD675-3 and GD755-3. No frame machining or pipeline retrofitting is required during replacement, greatly cutting downtime in remote roadside construction sites.

✅ Shock-Absorbing Thick Cast Iron Shell

Integrated heavy alloy cast iron housing buffers frequent bumps and vibration from rough unpaved roads and heavy blade grading tasks. It prevents shell microcracks and loosening of delicate inner hydraulic elements even under long cycles of harsh pavement work.

✅ All-Terrain Dust & Mud Resistant Seal Design

Stacked premium fluorine rubber oil seals paired with enlarged outer dust gaskets intercept highway dust, sharp gravel, rainy mud and winter deicing slush. Seal wear slows remarkably in dry desert road zones, muddy mountain road worksites and cold-season maintenance scenarios.

✅ Strict Multi-Stage Pre-Shipment Quality Checks

All finished motors undergo 22MPa pressure retention leak testing, accurate rotational speed calibration and extended full-load aging trials. Hidden production defects are screened out beforehand to reduce recurring roadside maintenance expenses.

✅ Dual Budget-Friendly Procurement Solutions

Brand-new factory-standard units meet strict maintenance specifications of large road construction enterprises; professionally remanufactured products fully swap all worn internal hydraulic components to deliver prominent cost benefits for bulk warehouse stocking.

✅ Wide Cross-Model Compatibility

A single spare part is applicable to five mainstream Komatsu motor grader models, decreasing SKU quantities, simplifying inventory sorting work and lowering occupied warehouse capital.

✅ Dynamically Balanced Internal Rotor Assembly

Large-sized rotating internal parts receive professional dynamic balancing processing to minimize vibration and operational noise, offering reliable protection for fragile radiator fins and surrounding hydraulic pipework during bumpy off-road travels.

✅ Extended Lifespan of Whole Grader Hydraulic Circuits

Stable temperature control keeps large-displacement engines and key hydraulic assemblies within optimal thermal ranges, slowing the aging rate of pump internals, heavy rubber hoses and peripheral sealing fittings under continuous road grading workloads.

✅ Reliable Global Bulk Delivery Arrangement

Heavy-duty shockproof industrial packaging adapts to sea freight, air shipment and cross-border express delivery. Gradient bulk discounts are available, covered by unified 6-month global warranty excluding man-made damage and faulty installation.

Condition: Brand new

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