400-911-00150 fan pump For Doosan DX380, DX420, DX500 excavator

product parameters

Part No：400-911-00150
Type：Variable Displacement Piston Fan Pump
Applicable Equipment：Doosan DX380, DX420, DX500 excavator, matched with fan motor K1057295
Material：Cast iron housing, alloy steel piston, bronze valve plate, heavy-duty roller bearing
Surface Treatment：Anti-rust coating, ultrasonic deep cavity cleaning, thoroughly remove casting sand, metal scraps and burrs inside flow channel
Rated Working Pressure：26 MPa
Feature：Variable piston structure, proportional flow regulation, stable pressure output, fast response, low internal leakage, good contamination resistance, specially designed fan pump for Doosan DX380/DX420/DX500 large excavator independent cooling system
Working Temperature：-20℃ ~ +115℃
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

• **Multi-model compatible & proportional flow control**
400-911-00150 variable piston fan pump, compatible with Doosan DX380, DX420, DX500 excavator cooling system. Works seamlessly with supporting fan motor K1057295. Output flow automatically changes responding to engine temperature signal to match heat load, effectively solving overheating under heavy-load mining working conditions.
• **Heavy-duty cast iron housing, shock & vibration resistant**
Cast iron shell treated by stress relief annealing to eliminate residual internal stress. It can withstand continuous vibration, hydraulic impact and dust corrosion on mining sites. Less shell deformation and slower wear of internal components for longer service life.
• **Good anti-pollution & anti-cavitation performance**
Optimized suction and discharge flow path reduces oil turbulence and cavitation risk. Tolerates slightly contaminated hydraulic oil on mining site. Effectively prevents particle jamming, abnormal noise and premature component wear, ensuring continuous stable operation and less downtime.
• **Precise cooling regulation to protect whole machine**
Proportional control realizes intelligent cooling adjustment. It keeps engine and hydraulic components operating within safe temperature range, preventing thermal damage to radiator and engine caused by overheating. It is the premium matching replacement pump for Doosan DX380/DX420/DX500 overhaul and daily maintenance.

FAQ 

**Q1: Which excavator model is this fan pump suitable for? Is it universal?**
A1: This 400-911-00150 fan pump is specially designed for **Doosan DX380, DX420, DX500 excavator**, applied for independent proportional cooling hydraulic system. It cannot be universally used for other excavator models. Must be matched with K1057295 fan motor. Wrong model will lead to insufficient fan speed and machine overheating.

**Q2: What factory tests have been done for this pump?**
A2: All 400-911-00150 pumps are 100% inspected on professional hydraulic test bench, including flow test, pressure curve detection, high-low pressure tightness test and internal leakage inspection. Strict screening ensures stable field performance, test reports can be provided upon request.

**Q3: Does it need professional debugging after installation?**
A3: Standard dimension, direct replacement without modification. After installation, bleed air from cooling hydraulic circuit and check pump rotation direction. If machine is still overheating, check hydraulic oil cleanliness and proportional control signal.

**Q4: How to extend the fan pump service life?**
A4: Before installation, fully flush hydraulic pipeline and replace new hydraulic filter elements to remove dirt and particles. Inspect spline shaft, seal rings and mounting bracket for wear. After installation, perform no-load test run to check noise, pressure and temperature rise before putting into heavy mining operation.

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