K3V63S Fan Pump for Hitachi ZAX470 excavator

product parameters

Part No：K3V63S
Full Model：K3V63S-102R-1F29
OEM No：4633474
Type：Variable Displacement Axial Piston Hydraulic Fan Pump
Applicable Equipment：Hitachi ZAX470 Excavator, compatible with ZX450-3, ZX470-3
Material：High strength alloy cast iron housing, alloy steel piston & slipper assembly
Surface Treatment：Anti-rust coating, internal cavity flushing & cleaning
Control Mode：Load sensing variable control
Feature：High volumetric efficiency, stable flow output, low internal leakage, low noise, strong anti-shock capacity
Working Temperature：-20℃ ~ +110℃
Max working pressure：31MPa
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 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.
• Strong adaptability to harsh construction 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 K3V63S fan pump fit? Can it replace other part numbers?
A1: It is specially designed for Hitachi ZAX470 excavator, compatible with ZX450-3, ZX470-3. 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.

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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