Hydraulic Pump 708-1T-11751 Fan Motor Komatsu

Product Overview

708-1T-11751 hydraulic fan motor is OEM heavy-duty cooling replacement part custom-made for Komatsu D155AX-6A, D155A-6 and D155A-6R heavy bulldozers.

As the core power component of radiator cooling circuits for these three D155-series dozers, this electro-proportional hydraulic fan motor dynamically modulates fan rotational speed according to real-time coolant and hydraulic oil temperature variations. It delivers stable and powerful heat dissipation during open-pit mining push work, large land reclamation, highway subgrade construction and quarry leveling, effectively preventing engine thermal overload during long-hour continuous shifts and cutting redundant fuel consumption through adaptive speed adjustment.

Product Highlights

✅ Custom Proportional Speed Tuning for D155 Series

Heavy-duty built-in DC12V proportional solenoid achieves stable stepless speed regulation. Fan speed rises automatically during heat-heavy pushing operations and reduces under light-load idle periods, lowering parasitic engine power loss and optimizing long-term fuel efficiency.

✅ Precise OEM Mounting Geometry

Strengthened mounting flanges, thick oil port threads and heavy-duty splines perfectly fit the installation cavity of the three D155 dozer variants. Field swap does not need cutting or reshaping of bulldozer frames, greatly shortening repair downtime at remote construction sites.

✅ Shockproof Thick Cast Iron Housing

Monolithic extra-thick cast iron casing buffers intense vibration caused by rocky mine travel and deep earth pushing, avoiding shell cracks and loosening of internal precision hydraulic assemblies under long harsh working cycles.

✅ Tiered Dust & Mud Resistant Sealing

Stacked fluorine rubber seals plus heavy outer dust gaskets trap coarse mineral dust and wet mud, slowing seal abrasion in open mines, muddy water conservancy sites and dusty highway construction zones.

✅ Multi-Round High-Pressure Factory Inspection

All finished motors pass heavy-pressure leak retention tests, fine speed calibration and extended full-load aging trials to screen defective units, decreasing costly recurring field maintenance.

✅ Dual Procurement Solutions

Brand-new factory-spec assemblies meet strict maintenance requirements of large mining fleets; remanufactured products replace all worn internal heavy parts to bring obvious cost advantages for bulk purchasing.

✅ Triple D155 Variant Compatibility

One spare unit covers D155AX-6A, D155A-6 and D155A-6R, cutting SKU counts and simplifying inventory sorting and warehouse stocking work for spare part retailers.

✅ Dynamically Balanced Heavy Rotor

Internal bulky rotating components go through professional dynamic balancing to cut vibration and operating noise, reliably safeguarding large radiator structures and surrounding thick hydraulic pipelines.

✅ Improve Long-Term Bulldozer Reliability

Stable thermal control keeps large-displacement engines and main hydraulic systems within optimal temperature bands, slowing degradation of pump internals, thick rubber hoses and peripheral seals under uninterrupted heavy workloads.

✅ Convenient Global Bulk Shipping

Robust industrial packaging adapts sea, air and international express delivery; tiered bulk discounts are available, all covered by standardized six-month worldwide warranty clauses.

Condition: Brand new

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