Fan Pump for SANY SY485/SY550 excavator

product parameters

Part No：SY485/550 Fan Pump
OEM No：60322577（for SY485）, 60324200（for SY550）
Type：Variable Displacement Axial Piston Hydraulic Fan Pump
Theoretical Displacement：28cc/rev（SY485）,30cc/rev（SY550）; theoretical flow rate up to 115 L/min(SY485),122L/min(SY550) at rated speed
Applicable Equipment：SANY SY485, SY550 excavator, matched with MSF23 & MSF30 fan motor
Material：High strength alloy cast iron housing, carburized alloy steel piston, copper alloy slipper retainer, DLC coated valve plate
Surface Treatment：Manganese phosphate anti-rust coating, ultrasonic deep cavity cleaning, thoroughly remove casting sand, metal scraps and burrs inside flow channel
Control Mode：Electric proportional variable control, temperature signal feedback
Rated Pressure：25 MPa
Max Instantaneous Peak Pressure：31 MPa
Feature：High volumetric efficiency, fast proportional response, stable flow delivery, low internal leakage, low vibration & noise, strong anti-pollution property, compact layout, specially designed for SANY large excavator cooling circuit
Working Temperature：-20℃ ~ +115℃
Rated Rotation Speed：1900 rpm, Max allowable speed:2200 rpm
Package：Independent anti-rust packing + Standard export carton

• Ultra-precision ground internal friction pairs. Pistons, slippers and DLC coated valve plate are finished to tight tolerance. Higher volumetric efficiency and significantly reduced internal leakage. Equipped with electronic proportional solenoid valve, fast response to temperature signal, automatically adjusting oil supply flow to match the heat dissipation demand of engine and hydraulic oil.
• Good resistance to contaminated hydraulic oil. Optimized internal flow channel design reduces blockage risk caused by tiny solid particles. Manganese phosphate anti-rust coating protects outer housing against dust, mud and humidity in harsh field environments, lowering abrasion, cavitation and premature failure risks over long service cycles.
• Strict multi-stage inspection before shipment. Each fan pump is tested on hydraulic bench for pressure, flow, proportional response and leakage. Spline dimension and assembly quality are fully verified. Batch consistency is guaranteed; defective products will be rejected before packing.
• Protect engine, main hydraulic pump and whole cooling hydraulic circuit. Proportional flow supply ensures fan motor operates smoothly. Prevent overheating damage to engine and hydraulic components, protect fan motor, hydraulic pipeline and sealing assemblies, reducing secondary damage risk of related hydraulic spare parts.
• Direct replacement with good cost performance. All mounting dimensions, port layout and spline specs fully match OE specs. No cutting, drilling or modification needed during installation. Fast field replacement. Reliable aftermarket spare part for overhaul and routine maintenance, balancing quality and procurement cost.

FAQ 

Q1: Which machine does SY485/550 fan pump fit? Can it replace other part numbers?
A1: It is designed for SANY SY485 and SY550 large mining excavators, used together with MSF23 and MSF30 fan motor. Not universal for other excavator models. Wrong pump selection may lead to insufficient fan flow, machine overheating, unstable fan speed or solenoid failure. Please verify machine model and OEM part number before purchase.

Q2: What tests are performed before shipment?
A2: Every fan pump is 100% inspected on hydraulic test bench. Tests include pressure test, full-range flow test, proportional solenoid response test, internal & external leakage inspection and dimensional verification. Simulated load assessment to guarantee stable performance after installation. Test records can be supplied upon request.

Q3: What pre-installation work helps extend service life?
A3: Thoroughly clean hydraulic pipeline, flush old contaminated oil. Replace hydraulic filter and check oil cleanliness. Inspect matched fan motor, mounting bracket and seals. After installation, run no-load test and check pump noise, pressure and fan speed change before putting machine back into heavy-duty mining work.

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