Hydraulic Pump 708-1T-00440 Fan Motor Komatsu

Product Overview

708-1T-00440 hydraulic fan motor is OEM-certified heavy-duty cooling replacement part designed for Komatsu heavy bulldozers D275A, D155AX and D275AX.

Acting as the core power component of radiator cooling loops for these large bulldozers, this electro-proportional hydraulic fan motor dynamically adjusts fan rotational speed following real-time shifts in engine coolant and hydraulic oil temperatures. It delivers powerful, stable heat dissipation during intensive open-pit mining operations, large-scale land reshaping and steep-gradient earthworks, preventing engine overheating during long continuous work shifts and cutting wasted fuel through adaptive intelligent speed regulation.

Product Highlights

✅ Mining-Oriented Proportional Stepless Speed Control

Robust built-in DC12V proportional solenoid delivers reliable speed adjustment. Fan speed rises automatically when bulldozers undertake heat-intensive pushing jobs in mines and slows down during light-duty intervals, reducing ineffective engine power consumption and enhancing long-cycle fuel economy.

✅ Factory-Matched Heavy Mounting Dimensions

Thickened mounting flanges, reinforced threaded oil ports and sturdy shaft splines precisely fit the original installation positions of three bulldozer models. On-site replacement can be finished efficiently without altering the dozer frame, minimizing costly downtime in remote mining work zones.

✅ Shock-Resistant Monolithic Cast Iron Shell

Extra-thick integral cast iron casing absorbs strong mechanical impacts from bumpy mine roads and deep-earth pushing work, preventing shell microcracks and displacement of delicate internal hydraulic assemblies throughout long harsh service periods.

✅ Multi-Layer Reinforced Dust & Mud Sealing System

Stacked heavy fluorine rubber seals paired with oversized outer dust gaskets intercept coarse rock dust and thick construction mud, retaining stable sealing performance in open mines, muddy reclamation sites and seasonal wet working conditions.

✅ Strict High-Pressure Pre-Delivery Quality Inspection

All finished motors undergo heavy-pressure leak retention tests, fine speed calibration and long-duration full-load aging trials, eliminating defective products and cutting down expensive subsequent field maintenance.

✅ Two Available Procurement Schemes

Brand-new original-spec assemblies meet stringent maintenance criteria of large mining enterprises; premium remanufactured variants fully replace worn internal heavy components to bring prominent cost savings for bulk purchase orders.

✅ Triple Popular Bulldozer Model Compatibility

One spare motor is compatible with D275A, D155AX and D275AX, decreasing spare part SKU amounts and simplifying warehouse classification and stock management for hydraulic part distributors.

✅ Precision Balanced Heavy Rotor Assembly

Large internal rotating parts are dynamically balanced to suppress operating vibration and noise, delivering dependable protection for bulky radiator modules and thick adjacent hydraulic pipelines.

✅ Extended Hydraulic System Service LifeConsistent temperature stabilization keeps large engines and main hydraulic components within optimal thermal ranges, slowing wear of heavy pump internals, thick rubber hoses and robust peripheral seals under round-the-clock mining workloads.

✅ Reliable Global Bulk Logistics

Heavy-duty outer packaging adapts ocean shipping, air freight and international express delivery; tiered wholesale discounts apply to bulk purchases, backed by unified six-month global warranty provisions.

Condition: Brand new

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