Fan Hydraulic Pump for XCMG 490, LiuGong 950, LiuGong 956 and other models
1. Product Overview
This fan hydraulic pump is a core power component of the cooling hydraulic system for large excavators. It drives the cooling fan motor to realize fan rotation, adjusting heat dissipation efficiency of the whole machine. Manufactured strictly in accordance with OEM installation dimensions, this pump can be directly used for maintenance replacement of XCMG 490, LiuGong 950, LiuGong 956 and other similar heavy-duty excavators. The product adopts precision processing technology, with excellent pressure resistance, low noise and stable output performance. It can adapt to high-load, continuous working conditions of engineering machinery and effectively guarantee stable operation of the cooling hydraulic system.
Product Feature Description
Special hydraulic fan pump for large excavator cooling circuit, interchangeable aftermarket spare part for multiple excavator models.
2. Main Technical Parameters
Item Specification
Product Type Fan drive hydraulic pump
Applicable Equipment XCMG 490, LiuGong 950, LiuGong 956 and other large excavators
Rated Working Pressure 16～21 MPa
Maximum Intermittent Pressure 25 MPa
Rotation Speed Range 600～2800 rpm
Standard Seals NBR nitrile rubber; FKM high temperature resistant seals optional
Applicable Hydraulic Oil ISO VG46, VG68 anti-wear hydraulic oil
Operating Temperature -20℃ ~ +95℃
Function Supply hydraulic power to fan motor for radiator cooling
3. Working Principle
Driven by the engine power take-off, the fan hydraulic pump absorbs hydraulic oil from the oil tank and outputs pressurized oil to the fan motor in the cooling hydraulic system. The hydraulic motor converts hydraulic energy into mechanical energy to drive the cooling fan. By changing the pump output flow or system pressure, the fan speed can be adjusted automatically to control the temperature of hydraulic oil and engine coolant and prevent overheating failure of excavator.
4. Core Advantages
1. Consistent with original installation size, plug-and-play replacement without pipeline modification.
2. Precise internal matching structure, low internal leakage and stable flow output.
3. Good heat resistance and anti-fatigue performance, suitable for long-term heavy-load operation.
4. Strong anti-pollution capability, adapting to harsh outdoor construction environment.
5. Compact structure, convenient disassembly and on-site maintenance.
6. Economical aftermarket alternative to original factory hydraulic pump.
5. Application Range
This fan hydraulic pump is widely applied to the cooling hydraulic system of XCMG 490, LiuGong 950, LiuGong 956 and other large tonnage excavators, used in earthwork excavation, mine operation and infrastructure construction projects.
6. Common Faults & Replacement Suggestion
Common malfunctions: insufficient fan rotating speed, high oil temperature of the whole machine, oil leakage at shaft seal and joint surface, abnormal noise during operation. It is recommended to replace the complete fan hydraulic pump assembly to restore normal cooling performance of excavator.
