Hydraulic Pump 708-3s-11220 Fan Motor Komatsu

Product Overview

708-3S-11220 hydraulic fan motor is OEM-certified heavy-duty cooling replacement part tailor-made for Komatsu PC30MR-2, PC40MR-2 and PC50MR-2 compact mini excavators.

Serving as the core power component within radiator cooling assemblies of these three popular mini excavator variants, this electro-proportional hydraulic fan motor dynamically modulates fan rotational speed according to real-time fluctuations of engine coolant and internal hydraulic oil temperatures. It delivers dependable heat dissipation across a wide array of light construction assignments, including narrow municipal trench excavation, residential landscape refurbishment, small-scale foundation digging, confined indoor renovation and scattered rural farmland earthworks. Adaptive speed control effectively prevents engine thermal overload amid frequent start-stop operation cycles, while cutting redundant fan rotation during short idle intervals to bring tangible fuel savings on compact job sites.

Product Highlights

✅ Triple-Model Optimized Proportional Speed Regulation

Compact built-in DC12V proportional solenoid delivers smooth stepless speed tuning matching the distinct operating features of PC30MR-2, PC40MR-2 and PC50MR-2. Fan speed automatically ramps up during continuous digging for sufficient heat removal, and drops during frequent work pauses to minimize idle power wastage and long-term fuel expenditure.

✅ Space-Efficient OEM Mount Layout for Restricted Engine Bays

Downsized reinforced mounting flanges, finely threaded hydraulic ports and precision splined shafts perfectly adapt to the tight installation space of the three excavator models. No on-site frame cutting or pipeline remodeling is required throughout replacement procedures, greatly shortening equipment downtime in crowded urban streets and residential construction zones.

✅ High-Strength Shockproof Mini Cast Iron Housing

Thickened cast iron shell absorbs subtle recurring vibration from frequent light digging impacts and bumpy narrow-path commutes, preventing casing cracks and loosening of delicate internal hydraulic components under heavy daily workloads.

✅ Multi-Environment Dust and Mud Resistant Seal System

Stacked premium fluorine rubber oil seals together with outer compact dust gaskets block concrete dust, loose landscaping dirt and wet trench muck, slowing seal degradation for courtyard gardening works, narrow municipal trenches and muddy rural construction plots.

✅ Rigorous Multi-Step Factory Quality Control

All finished products go through a 22MPa 30-minute pressure retention leak test, accurate linear speed calibration and 2.5 hours of continuous full-load aging screening. Potential manufacturing defects get eliminated pre-shipment to reduce repeated field maintenance demands.

✅ Dual Procurement Options to Fit Different Budget Plans

Factory-new units meet strict official maintenance standards of authorized Komatsu service centers; remanufactured versions comprehensively replace worn internal hydraulic core components, offering prominent cost advantages for wholesalers maintaining bulk mini excavator spare inventory.

✅ Optimize Warehouse Stock Arrangement

One single spare matches three mainstream mini excavator models, cutting down required SKU quantities, simplifying stock categorization and lowering capital occupied by scattered small spare inventories.

✅ Precision Dynamic Balancing for Internal Rotors

Mini rotating assemblies are professionally dynamically balanced to lower vibration and operational noise, offering reliable protection for fragile compact radiator fins housed inside narrow engine compartments.

✅ Prolong Service Life of Entire Compact Hydraulic Loops

Stable thermal stabilization keeps small-displacement engines and matched hydraulic fittings within ideal temperature bands, decelerating ageing of tiny pump internals, slim rubber hoses and peripheral seals under repeated startup-shutdown work rhythms.

✅ Excellent Cross-Border Shipping Compatibility

Compact overall dimensions reduce international freight costs, shock-absorbing industrial packaging remains stable in sea, air and regular parcel transportation. Tiered bulk purchase discounts are offered, backed by standard 6-month global warranty excluding man-made damage and faulty installation.

Condition: Brand new

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