Hydraulic Pump708-1T-00421 Fan Motor Komatsu

Product Overview

708-1T-00421 hydraulic fan motor is OEM-certified heavy-duty cooling replacement part specially designed for Komatsu heavy bulldozers D275A, D155AX and D275AX.

Serving as the core power component of radiator cooling circuits for these large construction machines, this electro-proportional hydraulic fan motor dynamically adjusts fan rotational speed in accordance with real-time changes of engine coolant temperature and hydraulic oil temperature. It delivers steady and powerful heat dissipation under harsh open-pit mining operations, large-scale land leveling and steep slope earthmoving assignments, effectively preventing engine thermal overload during long continuous work shifts and cutting redundant fuel consumption via adaptive speed regulation technology.

Product Highlights

✅ Mining-Tailored Proportional Speed Control

Heavy-duty built-in DC12V proportional solenoid realizes stable stepless speed adjustment. Fan speed rises automatically during high-load hot mining work and drops under light-duty conditions, reducing ineffective engine power loss and improving long-term fuel economy.

✅ Fully Matched OEM Heavy Installation Dimensions

Reinforced mounting flanges, robust oil port threads and heavy-duty splines perfectly fit the factory mounting positions of the three bulldozer models. On-site replacement can be completed efficiently without modifying the bulldozer frame, shortening costly downtime in remote mining zones.

✅ Shockproof Thick Cast Iron Shell

Monolithic extra-thick cast iron casing buffers strong impact from bumpy mine roads and heavy push operations, avoiding shell cracks and positional shift of internal precision hydraulic assemblies after long-term harsh usage.

✅ Multi-Layer Enhanced Dustproof and Mudproof Sealing

Tiered thick fluorine rubber seals paired with heavy outer dust gaskets intercept coarse mineral dust and wet mud, slowing seal wear notably in dusty quarries and muddy earthwork sites.

✅ Strict High-Pressure Factory Quality Screening

All finished products undergo heavy-pressure leak checks, fine speed calibration and long aging tests to eliminate defective units, cutting subsequent on-site maintenance frequency and maintenance expenditure.

✅ Two Practical Procurement Solutions

Brand-new original-spec assemblies meet strict maintenance requirements of large mining enterprises; remanufactured variants replace all worn internal heavy parts, bringing obvious cost advantages for bulk orders.

✅ Triple Bulldozer Model Compatibility

One spare motor works for D275A, D155AX and D275AX, decreasing the number of SKUs and simplifying inventory sorting and warehouse stocking work for spare part distributors.

✅ Dynamically Balanced Rotor Structure

Internal bulky rotating components are dynamically balanced to suppress vibration and running noise, offering reliable protection for large radiator assemblies and surrounding thick hydraulic pipelines.

✅ Prolong Whole-Machine Service Lifespan

Precise thermal management keeps the heavy engine and main hydraulic systems within optimal temperature ranges, slowing aging of pump internals, thick rubber hoses and peripheral sealing pieces under round-the-clock mining workloads.

✅ Mature Global Logistics Support

Sturdy industrial packaging adapts sea shipping, air freight and international express delivery; tiered bulk discounts are available, with unified six-month global warranty protection.

Condition: Brand new

Other model specifications

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