MSF-50-48 Fan Motor for Hitachi ZAX470 excavator

product parameters

Part No：MSF-50-48
OEM No：YA00005829, B0440-50005, 4634936
Type：Fixed Displacement Piston Hydraulic Fan Motor (New upgraded model)
Applicable Equipment：Hitachi ZAX470 Excavator, compatible with ZX450-3, ZX470-3, ZX470-5
Material：High strength alloy cast iron housing, alloy steel piston & slipper assembly
Surface Treatment：Anti-rust coating, internal cavity flushing & cleaning
Control Mode：Hydraulic proportional control
Feature：High torque output, low internal leakage, smooth rotation, low noise, strong anti-shock capacity
Working Temperature：-20℃ ~ +110℃
Max working pressure：30MPa
Max speed：3000 rpm
Displacement：50cc
Package：Independent anti-rust packing + Standard export carton
Storage suggestion：Keep dry, avoid moisture, rust and collision, indoor constant temperature storage, stay away from corrosive gas

• High-strength alloy cast iron housing. Precision casting plus stress relief annealing treatment. Excellent structural rigidity and shock resistance. It reliably withstands fluctuating hydraulic pressure and cyclic torque impact during excavator operation. It is not prone to deformation under continuous heavy-duty working conditions and maintains stable torque output.
• Precision ground internal friction pairs. Pistons, slippers and valve plate are processed to tight tolerance. It achieves higher volumetric efficiency and lower internal leakage. Fast response to temperature signal, automatically adjusting fan speed to keep engine temperature within normal range.
• Strong adaptability to harsh construction environments. Outer surface is coated with anti-rust protective layer. It can resist dust, mud, temperature fluctuation and continuous vibration on job sites, reducing risks of abrasion, cavitation and premature wear during long service cycles.
• Protect engine and whole cooling circuit. Stable torque & speed output keeps radiator efficient. Prevent engine overheating damage, protect oil cooler, hydraulic pipeline and seals, cutting down secondary damage of related parts.

FAQ 

Q1: Which machine does MSF-50-48 fan motor fit? Can it replace other part numbers?
A1: It is specially designed for Hitachi ZAX470 excavator, compatible with ZX450-3, ZX470-3, ZX470-5. Not universal for other Hitachi models. Mismatched motors may cause cooling failure, high engine temperature, fan stalling, abnormal noise and system component damage. Please carefully verify machine model and OEM part number before purchase.

Q2: What is your warranty, and what is excluded?
A2: 12-month warranty under correct installation, clean hydraulic oil and normal operation. Warranty excludes damage from contaminated oil, cavitation, wrong piping, overpressure, oil shortage and improper maintenance.

Q3: Is special adjustment required after installation?
A3: Precisely manufactured according to OE dimensions, direct installation normally. After fitting, bleed air from hydraulic circuit. If engine temperature is still high, check hydraulic pressure setting and oil cleanliness.

Q4: What pre-installation work helps extend service life?
A4: Clean hydraulic pipeline thoroughly, flush old contaminated oil. Replace hydraulic filter and check oil cleanliness. Inspect control valve, hoses and seals. After installation, run no-load test and monitor motor pressure, rotating speed and temperature before heavy load work.

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