Hydraulic Pump 705-12-35140 Fan Motor Komatsu

Product Overview

705-12-35140 hydraulic fan motor is OEM heavy-duty cooling replacement part custom-made for Komatsu PC4000-6 and PC3000-6 large excavators.

As the core power component of radiator cooling circuits for these two large excavator models, this electro-proportional hydraulic fan motor dynamically adjusts fan rotational speed based on real-time fluctuations of coolant and hydraulic oil temperatures. It delivers stable and powerful heat dissipation during heavy mining excavation, quarry digging, large-scale earthworks and long-duration quarry operation, effectively preventing engine thermal overload during long-hour continuous shifts and cutting redundant fuel consumption through adaptive speed adjustment.

Product Highlights

✅ Adaptive Proportional Speed Control for Large Excavators

Heavy-duty built-in DC12V proportional solenoid achieves smooth stepless speed regulation. Fan speed automatically rises to boost cooling during intensive digging cycles and drops under idle states, lowering unnecessary parasitic power loss and optimizing long-term fuel efficiency.

✅ Precise OEM Mounting Geometry

Reinforced mounting flanges, sturdy hydraulic port threads and precision-cut shaft splines perfectly match the factory installation dimensions of PC4000-6 and PC3000-6. No frame cutting or pipeline rework is needed during replacement, which greatly cuts machine downtime in remote mining zones.

✅ Shock-Resistant Thick Cast Iron Housing

Integral extra-thick alloy cast iron casing buffers heavy vibration triggered by rocky mine transit and frequent high-load bucket excavation. It avoids shell cracks and loosening of delicate internal hydraulic components even after long stretches of harsh field operation.

✅ Tiered Dust & Mud Resistant Sealing System

Stacked premium fluorine rubber oil seals together with enlarged outer dust gaskets block coarse rock dust, cement particles and sticky construction mud. Seal wear slows significantly in dusty open mines, muddy excavation pits and aggregate processing yards.

✅ Rigorous Multi-Stage Factory Quality Checks

All finished motors go through 22MPa pressure retention leak testing, fine rotational speed calibration and extended full-load aging trials. Flawed products get filtered out beforehand to reduce expensive on-site repair frequency.

✅ Dual Feasible Procurement Choices

Brand-new factory-standard units meet strict maintenance benchmarks of large mining enterprises; professionally remanufactured versions fully swap out worn internal heavy parts, bringing prominent cost benefits for bulk stock orders.

✅ Dual Large Excavator Compatibility

A single spare motor is suitable for both PC4000-6 and PC3000-6, decreasing SKU quantities and simplifying warehouse categorization and stocking management for hydraulic spare part suppliers.

✅ Dynamically Balanced Internal Rotor Assembly

Large internal rotating parts are processed with professional dynamic balancing technology to mitigate vibration and operational noise, delivering steady protection for bulky radiator fins and adjacent heavy hydraulic pipelines.

✅ Extend Overall Hydraulic System Lifespan

Reliable thermal regulation keeps large-displacement engines and key hydraulic parts within ideal temperature ranges, slowing the aging of pump internal structures, thick rubber hoses and peripheral seals under round-the-clock heavy digging workloads.

✅ Global-Friendly Bulk Shipping Arrangement

Tough industrial packaging performs well in sea freight, air cargo and international express transit. Gradient bulk discounts are available, with unified 6-month worldwide warranty excluding man-made damage and incorrect installation.

Condition: Brand new

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