Hydraulic Pump 708-3S-00261 Fan Motor Komatsu

Product Overview

708-3S-00261 hydraulic fan motor is OEM-grade heavy-duty cooling replacement part specially manufactured for Komatsu PC40MR-1, PC45MR-1 and PC45MRX-1 compact mini excavators.Acting as the core power part of radiator cooling loops for these three popular compact excavator models, this electro-proportional hydraulic fan motor intelligently adjusts fan rotational speed following real-time variations of engine coolant and internal hydraulic oil temperatures. It delivers steady and reliable heat dissipation in diversified work scenarios, covering narrow municipal trenching, residential landscape renovation, small foundation digging, confined indoor refurbishment and light farmland earthmoving. Adaptive speed regulation effectively prevents engine overheating during frequent start-stop operation cycles featured by compact construction machinery, and optimizes fuel efficiency by cutting redundant fan rotation during intermittent idle intervals on small job sites.

Product Highlights

✅ Triple-Model Matched Proportional Speed Tuning

Dedicated compact DC12V proportional solenoid brings smooth stepless speed adjustment adapted to the working traits of PC40MR-1, PC45MR-1 and PC45MRX-1. Fan speed rises automatically during sustained digging to deliver adequate cooling performance, and lowers amid frequent work pauses to reduce idle engine power wastage and cut long-term fuel expenses.

✅ High-Precision OEM Mount Design for Restricted Engine Bays

Downsized reinforced mounting flanges, finely machined hydraulic port threads and matched shaft splines perfectly suit the narrow installation space of the three excavator variants. No on-site metal cutting or pipeline rework is required during swap-out, greatly shortening downtime in crowded urban streets and residential construction zones.

✅ Compact Anti-Vibration Cast Iron Casing

Thickened mini cast iron shell absorbs repeated micro-shocks produced by short-stroke digging movements and uneven-site travelling, preventing shell deformation and loosening of delicate internal hydraulic components throughout intensive daily operation cycles.

✅ Multi-Scenario Dust & Mud Resistant Sealing Structure.

Layered premium fluorine rubber sealing rings paired with mini outer dust gaskets block concrete powder, horticultural dirt and damp trench sludge, slowing seal abrasion in municipal trench projects, courtyard landscaping assignments and muddy suburban construction plots.

✅ Multi-Stage Pre-Shipping Quality Screening

All finished units pass 22MPa 30-minute pressure retention leak inspection, precision linear speed calibration and a 2.5-hour continuous full-load aging test. Hidden manufacturing flaws get eliminated beforehand to decrease frequent subsequent on-site maintenance tasks.

✅ Dual Budget-Friendly Procurement Solutions

Brand-new factory-standard units satisfy strict official dealership maintenance criteria; remanufactured products thoroughly refresh worn internal hydraulic cores, bringing evident cost advantages for wholesalers maintaining bulk mini excavator spare inventories.

✅ Improve Overall Stock Management Efficiency

One spare can adapt to three mainstream Komatsu mini excavator models, cutting down the quantity of demanded SKUs, simplifying warehouse sorting work and lowering capital locked inside scattered spare stocks.

✅ Dynamically Balanced Mini Internal Rotor

Scaled-down rotating internal components go through professional dynamic balancing treatment to suppress vibration and operational noise, offering steady protection for fragile compact radiator fins inside narrow engine compartments.

✅ Extend Service Life of Compact Hydraulic Circuits

Stable thermal regulation keeps small-displacement engines and matched hydraulic fittings within ideal working temperature ranges, slowing ageing of miniature pump internals, slim rubber hoses and peripheral seals under frequent startup-shutdown operation rhythms.

✅ Reliable Global Shipping Adaptability

Compact overall dimensions reduce international freight expenditure, shockproof industrial packaging performs reliably in sea freight, air shipment and ordinary parcel delivery. Tiered bulk discounts are available, backed by unified 6-month global warranty excluding man-made damage and incorrect installation.

Condition: Brand new

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