K7V63S Fan Pump for Hitachi ZX870-5G excavator

product parameters

Part No：K7V63S
Type：Variable Displacement Axial Piston Hydraulic Fan Pump
Theoretical Displacement：65 cc/rev, theoretical flow rate up to 122 L/min at rated speed
Applicable Equipment：Hitachi ZX870-5G Excavator, compatible with ZX850-5G
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 metal scraps and impurities inside flow channel
Control Mode：Load sensing proportional variable control, electronic temperature signal feedback
Rated Pressure：27 MPa
Max Instantaneous Peak Pressure：34 MPa
Feature：High volumetric efficiency, stable flow delivery, low internal leakage, low vibration & noise, strong anti-cavitation performance, optimized for 5G generation large mining excavator
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

• High-strength alloy cast iron housing. Integral casting and 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 resists deformation under continuous heavy-duty working conditions and maintains stable flow output.
• Ultra-precision ground internal friction pairs. Pistons, slippers and DLC coated valve plate are processed to tight tolerance. Higher volumetric efficiency and significantly reduced internal leakage. Fast response to electronic temperature signal, automatically adjusting oil supply flow to match dual cooling load of engine and hydraulic oil for 5G excavators.
• Outstanding adaptability to harsh mining environments. Outer surface adopts manganese phosphate anti-rust coating. It can resist dust, mud, rapid temperature change and continuous vibration on quarry sites, lowering abrasion, cavitation and premature failure risks over 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, non-conforming items will be rejected before packing.
• Protect engine and whole cooling hydraulic circuit. Stable pressure & flow supply ensures fan motor operates smoothly. Prevent engine overheating damage, protect fan motor, hydraulic pipeline and sealing assemblies, reducing secondary damage of related hydraulic spare parts.

FAQ 

Q1: Which machine does K7V63S fan pump fit? Can it replace other part numbers?
A1: It is specially designed for Hitachi ZX870-5G large excavator, compatible with ZX850-5G. 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: 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, set pressure according to service manual. If engine temperature remains high, check system pressure setting and hydraulic oil cleanliness.

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