Hydraulic Pump 708-3T-001140 Fan Motor Komatsu

Product Overview

708-3T-001140 hydraulic fan motor is OEM-grade heavy-duty cooling replacement part precisely engineered for Komatsu PC78US-6 compact short-swing excavator.

Serving as the core power assembly of the radiator cooling loop built exclusively for PC78US-6, this electro-proportional hydraulic fan motor intelligently adjusts fan rotational speed in response to real-time variations in engine coolant and internal hydraulic oil temperatures. It delivers stable and reliable heat dissipation for a wide array of construction assignments, including narrow downtown trench works, residential landscape upgrading, small-scale foundation excavation, constrained indoor refurbishment and scattered rural land improvement projects. Adaptive speed regulation effectively avoids engine thermal overload amid frequent start-stop operation cycles typical of compact excavators, and optimizes fuel consumption by cutting unnecessary fan rotation during intermittent idle periods at construction sites.

Product Highlights

✅ Model-Tailored Proportional Speed Calibration

Dedicated DC12V proportional solenoid undergoes exclusive parameter tuning for the thermal characteristics of PC78US-6. Fan rotating speed rises automatically during continuous digging tasks to maintain adequate heat removal, and reduces during frequent work pauses to curb idle power loss and cut long-term fuel expenditure.

✅ Precision OEM Mounting Suited for Narrow Short-Swing Engine Bay

Downsized reinforced mounting flanges, finely machined hydraulic port threads and matched shaft splines perfectly fit the limited internal installation space of PC78US-6. No on-site metal cutting or hydraulic pipe rework is required in replacement procedures, greatly shortening machine downtime for cramped urban construction locations.

✅ Vibration-Resistant Compact Cast Iron Shell

Thickened mini cast iron casing dampens continuous micro-shocks brought by frequent short-stroke excavation operations, preventing housing deformation and loosening of delicate internal hydraulic components even under heavy daily workloads.

✅ Multi-Scenario Dustproof & Mudproof Sealing Layout

Multi-tier premium fluorine rubber sealing rings paired with mini outer dust gaskets isolate concrete powder, garden soil and damp trench sludge from internal mechanical structures, slowing seal abrasion during city municipal projects, courtyard landscaping and muddy suburban construction tasks.

✅ Multi-Stage Pre-Delivery Quality Screening Mechanism

All finished units pass a 30-minute 22MPa pressure retention leak check, precision linear speed calibration and a 2.5-hour continuous full-load aging test. Hidden manufacturing defects get eliminated in advance to decrease the frequency of subsequent field maintenance visits.

✅ Dual Budget-Oriented Procurement Options

Factory-new products satisfy strict maintenance benchmarks of authorized Komatsu dealerships; remanufactured units fully renew worn internal hydraulic core parts, delivering obvious cost advantages for wholesalers maintaining targeted spare stock for PC78US-6 fleets.

✅ Simplify Specialized Inventory Management

This dedicated spare part removes the risk of mismatching multi-model components, simplifying warehouse SKU sorting for merchants focusing on the popular PC78US-6 model and releasing capital locked by redundant miscellaneous spare inventory.

✅ Dynamically Balanced Internal Rotor Unit

Scaled-down rotating internal components go through professional dynamic balancing processing to suppress vibration and operational noise, offering solid protection for fragile compact radiator fins inside the narrow engine compartment of PC78US-6.

✅ Extend the Whole Compact Hydraulic Circuit Service Life

Stable thermal control keeps the small-displacement engine and matching hydraulic fittings within optimal temperature bands, slowing ageing of tiny pump internals, slim rubber hoses and peripheral seals amid recurring startup-shutdown work cycles.

✅ Excellent Global Logistics Adaptability

Compact outer dimensions lower international shipping costs, shock-resistant industrial packaging performs steadily through 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 work.

Condition: Brand new

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