KYB Fan Motor MSF‑12‑10‑1 B0440‑12001 for Komatsu WA100

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Product details

KYB Fan Motor MSF‑12‑10‑1 B0440‑12001 for Komatsu WA100 WA150 WA200 WA250 Wheel Loader

Product Overview

KYB MSF‑12‑10‑1 is a high‑performance hydraulic piston motor, also known as cooling fan hydraulic motor. Part numbers include B0440‑12001, 418‑03‑33241, 419‑03‑33242. This hydraulic motor is specially designed for Komatsu WA100, WA150, WA200, WA250 wheel loader machine. It obtains power from the whole hydraulic system to drive the cooling fan assembly, controlling the heat dissipation of engine and hydraulic oil. It serves as an ideal replacement component when the original hydraulic motor suffers oil leakage, abnormal noise, fan speed failure or stalling.

Technical Specifications

- Motor Model: MSF‑12‑10‑1 (KYB Series)

- OEM Part No: B0440‑12001

- Alternative Part Numbers: 418‑03‑33241, 419‑03‑33242

- Product Type: Hydraulic piston motor / hydraulic motor

- Applicable Machine: Komatsu WA100, WA150, WA200, WA250 wheel loader

- Function: Hydraulic‑driven cooling fan drive

- Power Source: Loader hydraulic system

- Working Medium: Anti‑wear hydraulic oil

- Installation: Direct mounting for fan assembly

Working Principle

Supplied with pressurized oil flow from the machine hydraulic system, this hydraulic piston motor converts hydraulic pressure energy into mechanical rotational power. The hydraulic motor directly drives the radiator cooling fan to rotate. By adjusting oil flow from the hydraulic system, the fan speed changes accordingly, realizing automatic temperature control for engine and hydraulic oil. Proper fan operation prevents equipment overheating and protects key assemblies of the machine during heavy‑duty operation. Once internal components wear out, it will lead to slow fan rotation, overheating and machine performance drop.

Key Advantages

1. Strictly matches original mounting dimensions, high interchangeability for KYB MSF‑12‑10‑1 hydraulic motor, no extra modification required during installation.

2. Premium internal friction pairs, low internal leakage, keeps stable rotation performance under variable load of the hydraulic system.

3. Excellent shock‑resistance structure, adapts to dusty, rough construction‑site working conditions of the wheel loader machine.

4. Effectively solves typical failures: fan does not spin, insufficient rotating speed, oil seepage, strange noise, system overheating.

5. Reliable heat‑dissipation performance, protects engine and hydraulic components, extends overall service life of the hydraulic system and complete machine.

Application Scope

This KYB hydraulic piston motor is mainly fitted for Komatsu WA100, WA150, WA200, WA250 wheel loader machine. Widely used in quarry, earth‑moving project, stockyard and other construction‑site scenarios. As an important auxiliary execution component in the hydraulic system, the hydraulic motor guarantees normal heat dissipation and continuous safe operation of the loader.

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Main Product: hydraulic motor, gear box, hydraulic pump , hydraulic valve , hydraulic winch, hydraulic system

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