Hydraulic Pump 708-3S-00460 Fan Motor Komatsu

Product Overview

708-3S-00460 hydraulic fan motor is OEM heavy-duty cooling replacement part exclusively engineered for Komatsu PC40MR and PC50MR compact mini excavators.

As the core power component within the radiator cooling assembly of these two popular compact excavator models, this electro-proportional hydraulic fan motor intelligently adjusts fan rotational speed responding to real-time fluctuations of engine coolant and internal hydraulic oil temperatures. It delivers steady and reliable heat dissipation across diversified small-scale construction tasks, including municipal narrow trenching, residential landscape renovation, backyard earthworks, compact foundation digging and light indoor demolition jobs. Adaptive speed regulation effectively prevents engine overheating amid frequent work start-stop cycles, and optimizes fuel economy by lowering fan rotation speed during regular idle intervals that frequently appear in small-site construction schedules.

Product Highlights

✅ Dual-Model Tuned Proportional Speed System

Built-in compact DC12V proportional solenoid achieves smooth stepless speed adjustment tailored for PC40MR and PC50MR. Fan speed rises automatically during sustained digging for adequate heat dissipation, and reduces during frequent work pauses to cut unnecessary engine power consumption and lower long-term fuel costs.

✅ Perfect OEM Mounting Compatibility for Narrow Engine Bays

Downsized reinforced mounting flanges, finely machined port threads and matched shaft splines precisely fit the confined installation space of the two mini excavator variants. No on-site metal cutting or hydraulic pipe rework is required, greatly shortening equipment downtime at crowded urban and residential construction sites.

✅ Space-Saving Anti-Vibration Cast Iron Shell

Thickened compact cast iron casing dampens continuous micro-shocks from frequent light digging motions, avoiding housing deformation and loosening of delicate internal hydraulic components under dense daily working cycles.

✅ Multi-Scenario Dust, Sand and Mud Resistant Sealing

Layered premium fluorine rubber sealing rings paired with mini outer dust gaskets keep concrete powder, horticultural soil and damp trench sludge away from internal mechanisms, slowing seal abrasion in landscaping projects, municipal trench works and muddy suburban construction spots.

✅ Rigorous Multi-Stage Pre-Shipping Quality Screening

All finished units pass 22MPa 30-minute pressure retention leak inspection, precision linear speed calibration and 2.5-hour continuous full-load aging testing. Hidden manufacturing defects are eliminated beforehand to cut frequent follow-up maintenance work.

✅ Two Budget-Oriented Procurement Solutions

Brand-new factory-standard products satisfy strict official dealership maintenance requirements; remanufactured units fully renew worn internal hydraulic core components, bringing obvious cost advantages for wholesalers that carry bulk mini excavator spare inventory.

✅ Reduce Inventory Management Burden

A single spare part is compatible with two mainstream Komatsu mini excavator models, decreasing the total number of stocked SKUs, simplifying warehouse sorting and cutting capital locked in scattered spare stocks.

✅ Dynamically Balanced Mini Internal Rotor

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

✅ Extend Lifespan of Compact Hydraulic Loops

Stable temperature control maintains small-displacement engines and matched hydraulic fittings within optimal working temperature ranges, slowing ageing of miniature pump internals, slim rubber hoses and peripheral seals amid frequent startup and shutdown operation patterns.

✅ Convenient Global Logistics Adaptability

Compact overall dimensions help cut international shipping fees, and shockproof industrial packaging adapts well to sea freight, air transportation and ordinary parcel delivery. Tiered bulk purchase discounts are available, backed by unified 6-month global warranty excluding man-made damage and incorrect installation operations.

Condition: Brand new

Other model specifications

Technical Specifications:

Specifications: