K5V80S Fan Pump for Hitachi ZX870-3 excavator

product parameters

Part No：K5V80S
Type：Variable Displacement Axial Piston Hydraulic Fan Pump
Theoretical Displacement：82 cc/rev, theoretical flow rate up to 145 L/min at rated speed
Applicable Equipment：Hitachi ZX870-3 Excavator, compatible with ZX850-3
Material：High strength alloy cast iron housing, carburized alloy steel piston, brass slipper retainer, ceramic coated valve plate
Surface Treatment：Anti-rust phosphate coating, internal cavity cleaned by ultrasonic washing, no residual metal chips
Control Mode：Load sensing proportional variable control
Rated Pressure：28 MPa
Max Instantaneous Peak Pressure：35 MPa
Feature：High volumetric efficiency, stable flow output, low internal leakage, low noise, strong anti-shock capacity, suitable for heavy mining working condition
Working Temperature：-20℃ ~ +120℃
Rated Rotation Speed：1800 rpm, Max allowable speed:2100 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 load impact during heavy mining excavator operation. It is not prone to deformation under continuous heavy-duty working conditions and maintains stable flow 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 oil supply flow to match cooling load for engine and hydraulic oil.
• Strong adaptability to harsh construction & mining 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 pump is tested on hydraulic bench to check pressure, flow rate and external leakage. Spline dimension and assembly quality are fully verified. Batch consistency is guaranteed, and non-conforming products are eliminated before packing.
• Protect engine and whole cooling hydraulic circuit. Stable pressure & flow supply ensures fan motor runs smoothly. Prevent engine overheating damage, protect fan motor, hydraulic pipeline and seals, cutting down secondary damage of related hydraulic parts.

FAQ 

Q1: Which machine does K5V80S fan pump fit? Can it replace other part numbers?
A1: It is specially designed for Hitachi ZX870-3 large excavator, compatible with ZX850-3. Not universal for other Hitachi models. Mismatched pumps may cause insufficient fan flow, engine overheating, pressure fluctuation, abnormal noise and damage to fan motor. Please carefully 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, flow measurement, internal & external leakage inspection and dimensional verification. Simulated load assessment to guarantee stable performance after installation. Test records can be supplied upon request.

Q3: Is special adjustment required after installation?
A3: Precisely manufactured according to OE dimensions, direct installation normally. After fitting, bleed air from hydraulic circuit, set pressure according to service manual. If engine temperature remains high, check system pressure setting and hydraulic 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 fan motor, hoses and seals. After installation, run no-load test and monitor pump pressure, flow and oil temperature before heavy load mining work.

warehouse