Hydraulic Pump 708-3S-00872 Fan Motor Komatsu

Product Overview

708-3S-00872 hydraulic fan motor is OEM-grade heavy-duty cooling replacement part precisely engineered for Komatsu PC40MR-2 and PC50MR-2 compact mini excavators.

As the core power assembly built for radiator cooling loops of these two mature compact excavator models, this electro-proportional hydraulic fan motor intelligently adjusts fan rotational speed in response to real-time changes of engine coolant and internal hydraulic oil temperatures. It delivers stable and reliable heat dissipation across multiple small-scale construction scenarios, including narrow municipal trench digging, residential landscape upgrading, light foundation excavation, confined indoor refurbishment and scattered farmland earthworks. Adaptive speed regulation effectively prevents engine overheating under frequent start-stop operation cycles typical of compact construction machinery, and optimizes fuel consumption by cutting unnecessary fan rotation during intermittent idle periods on small job sites.

Product Highlights

✅ Dual-Model Calibrated Proportional Speed System

Purpose-built compact DC12V proportional solenoid achieves smooth stepless speed adjustment tailored to the working characteristics of PC40MR-2 and PC50MR-2. Fan speed rises automatically during sustained digging tasks to guarantee adequate cooling capacity, and lowers in frequent work pauses to reduce idle power loss and long-term fuel outlay.

✅ High-Precision OEM Mounting Fit for Cramped Engine Bays

Downsized reinforced mounting flanges, finely machined hydraulic port threads and matched shaft splines perfectly fit the narrow installation space of the two excavator variants. No on-site metal cutting or hydraulic pipe rework is needed during replacement work, greatly shortening equipment downtime in dense urban streets and residential construction plots.

✅ Vibration-Resistant Compact Cast Iron Shell

Thickened mini cast iron casing dampens continuous micro-shocks produced by frequent short-stroke digging, avoiding housing deformation and loosening of delicate internal hydraulic components throughout heavy daily operation cycles.

✅ Multi-Scenario Dustproof & Mudproof Sealing Design

Multi-tier premium fluorine rubber sealing rings paired with mini outer dust gaskets isolate concrete powder, horticultural soil and damp trench sludge from internal structures, slowing seal wear in municipal trench projects, courtyard landscaping assignments and muddy suburban construction sites.

✅ Multi-Stage Pre-Delivery Quality Screening

All finished units pass a 30-minute 22MPa pressure retention leak check, precision linear speed calibration and 2.5-hour continuous full-load aging test. Hidden manufacturing defects get eliminated in advance to cut down recurring field maintenance demands.

✅ Two Budget-Friendly Procurement Choices

Factory-new products satisfy strict maintenance standards of official Komatsu dealerships; remanufactured units fully refresh worn internal hydraulic core parts, bringing obvious cost benefits for wholesalers maintaining large mini excavator spare inventories.

✅ Streamline Inventory Management Workflow

One spare part is compatible with two mainstream compact Komatsu excavator models, lowering the number of required SKUs, simplifying warehouse sorting and releasing capital locked in scattered spare stocks.

✅ Dynamically Balanced Internal Rotor Unit

Scaled-down rotating internal components go through professional dynamic balancing processing to suppress vibration and operational noise, delivering solid protection for fragile compact radiator fins within narrow engine compartments.

✅ Extend Whole Compact Hydraulic Circuit Lifespan

Stable thermal control keeps small-displacement engines and supporting hydraulic fittings within optimal temperature ranges, slowing ageing of tiny pump internals, slim rubber hoses and peripheral seals amid frequent startup-shutdown cycles.

✅ Strong Adaptability for Global Logistics

Compact overall dimensions cut international shipping costs, shock-resistant industrial packaging holds up well in sea freight, air transport and ordinary parcel delivery. Tiered bulk purchase discounts are available, backed by unified 6-month global warranty excluding man-made damage and incorrect mounting.

Condition: Brand new

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