Hydraulic Pump 708-3S-00331 Fan Motor Komatsu

Product Overview

708-3S-00331 hydraulic fan motor is OEM-certified heavy-duty cooling replacement part exclusively engineered for Komatsu PC35MR-1 and PC35MRX-1A compact micro excavators.

Serving as the core power component of the radiator cooling circuit for the two compact excavator variants, this electro-proportional hydraulic fan motor dynamically modulates fan rotational speed responding to real-time shifts in engine coolant and internal hydraulic oil temperatures. It delivers reliable heat dissipation across narrow municipal trenching, courtyard landscape upgrading, confined indoor demolition work, small farm land tillage and tight residential construction assignments. Adaptive speed regulation prevents engine thermal overload amid frequent start-stop operation cycles featured by micro excavator tasks, meanwhile cutting unnecessary fuel consumption by reducing fan rotation during short idle intervals on small job sites.

Product Highlights

✅ Dual-Model Proportional Speed Customization

Miniature built-in DC12V proportional solenoid brings smooth stepless speed adjustment matching the working traits of PC35MR-1 and PC35MRX-1A. Fan speed automatically rises during consecutive digging for sufficient cooling output, and drops during frequent work pauses to lower idle power loss and routine fuel expenses.

✅ Space-Friendly OEM Mount Layout

Downsized reinforced mounting flanges, finely threaded hydraulic ports and precision splined shafts perfectly adapt to the constrained engine bay installation space of the two excavator models. No field frame cutting or pipeline alteration is needed during replacement, greatly shortening downtime at cramped urban and residential construction spots.

✅ Compact Shockproof Cast Iron Shell

Thickened mini cast iron casing buffers subtle recurring vibration from light digging impacts and bumpy narrow-path travel, avoiding casing cracks and loosening of delicate internal hydraulic elements throughout dense daily operation cycles.

✅ Multi-Site Dust and Mud Resistant Seal Structure

Stacked premium fluorine rubber oil seals alongside compact outer dust gaskets block concrete dust, loose garden dirt and viscous trench muck, slowing seal degradation in residential yards, narrow municipal trenches and damp rural construction plots.

✅ 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. Hidden manufacturing defects get removed prior to delivery to reduce recurring on-site maintenance work.

✅ Dual Procurement Options for Differing Budget Plans

Factory-new units satisfy strict official maintenance requirements for authorized service centers; remanufactured versions comprehensively swap out all worn internal hydraulic core components, bringing obvious cost advantages for wholesale warehouse inventory stocking.

✅ Cut Down Warehouse SKU Quantities

One spare part is compatible with two specialized Komatsu micro excavator models, simplifying stock classification and lowering capital locked into scattered small spare inventories.

✅ Precision Dynamic Rotor Balancing

Mini internal rotating assemblies receive professional dynamic balancing treatment to mitigate vibration and operational noise, protecting fragile compact radiator fins within narrow engine compartments.

✅ Prolong Compact Hydraulic System Service Life

Stable thermal stabilization keeps small-displacement engines and matched hydraulic modules within optimal temperature ranges, decelerating ageing of tiny pump internals, slim rubber hoses and peripheral seals under frequent start-stop working rhythms.

✅ Optimized Cross-Border Shipping Experience

Small overall dimensions decrease international freight costs, shock-absorbing industrial packaging performs excellently for sea, air and parcel express delivery. Tiered bulk discounts are available, backed by standard 6-month worldwide warranty excluding man-made damage and incorrect installation.

Condition: Brand new

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