M5BF 045 1N03 Fan Motor for Hitachi ZAX470 excavator

product parameters

Part No：M5BF 045 1N03
Type：Fixed Displacement Vane Hydraulic Fan Motor (Old model)
Applicable Equipment：Hitachi ZAX470 Excavator(old model), compatible with ZX450-3, ZX470-3
Material：High strength alloy cast iron housing, alloy steel rotor & vane assembly
Surface Treatment：Anti-rust coating, internal cavity flushing & cleaning
Control Mode：Hydraulic proportional control
Feature：Stable torque output, low internal leakage, smooth rotation, low noise, strong anti-shock capacity
Working Temperature：-20℃ ~ +110℃
Max working pressure：29MPa
Max speed：2800 rpm
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 machined internal vane assembly. Rotor, vanes and cam ring 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 operating 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.
• Strict multi-stage inspection before shipment. Each motor is tested on hydraulic bench to check pressure, torque, rotating speed and external leakage. Shaft dimension and assembly quality are fully verified. Batch consistency is guaranteed, and non-conforming products are eliminated before packing.
• 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 M5BF 045 1N03 fan motor fit? Can it replace other part numbers?
A1: It is specially designed for old model Hitachi ZAX470 excavator, compatible with ZX450-3, ZX470-3. 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 tests are performed before shipment?
A2: Every fan motor is 100% inspected on hydraulic test bench. Tests include pressure test, torque measurement, speed test, internal & external leakage inspection and dimensional verification. Simulated load assessment to guarantee stable performance after installation.

Q3: What is your warranty, and what is excluded?
A3: 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.

Q4: Is special adjustment required after installation?
A4: 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.

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