Relief valve 4479038/3379039 for Hitachi ZX30; protects main and auxiliary hydraulic systems.
Direct replacement for Hitachi ZX30 relief valves 4479038 & 3379039
Maintains hydraulic system pressure within safe limits
Prevents damage to pumps and cylinders under overload
Compact design fits tight excavator assemblies
Precision-engineered for mini-excavator performance
The YNF16476 Relief Valve (Hitachi part numbers 4479038 / 3379039) is a key safety and control component in the hydraulic system of the ZX30 mini excavator. Designed to relieve excess pressure from the main and auxiliary circuits, this valve prevents equipment failure and hydraulic oil leakage. Manufactured from corrosion-resistant materials and engineered to meet OEM performance specs, this valve ensures long-term pressure stability and safe operations in compact machinery. Ideal for B2B buyers servicing mini excavators and seeking dependable aftermarket solutions.
| Parameter | Details |
|---|---|
| Part Numbers | 4479038 / 3379039 |
| YNF Part Number | YNF16476 |
| Compatible Machine | Hitachi ZX30 |
| Part Category | Hydraulic Relief Valve |
| Function | Controls system pressure; overflow safety |
| Circuit Coverage | Main and auxiliary hydraulic loops |
| Material | Hardened steel, pressure-tested |
| Installation Area | Valve block/hydraulic manifold |
| Country of Origin | China |
| Brand | YNF |
| MOQ | 1 Piece |
| Shipping Method | Sea, Air, Express |
| Payment Method | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Mini Excavator Hydraulics | Protects compact circuits from overpressure |
| Main Pump & Cylinder Loops | Pressure regulation for system components |
| Auxiliary Equipment Ports | Ensures stability in secondary systems |
| Service Workshops & Dealers | Stock replacement for Hitachi mini parts |
Related Products:
Pilot Valve for Hitachi ZX30
Mini Excavator Hydraulic Pump Relief Valve
Main Control Valve Assembly for Compact Machines
FAQs:
Q: Is this compatible with other Hitachi models?
A: It is optimized for ZX30. Contact us with model numbers to verify other fits.
Q: Does it include calibration specs?
A: It is pre-set to OEM pressure standards and tested before shipment.
Q: Can I order small quantity?
A: Yes, MOQ is only 1 piece, with support for bulk orders.
YNF16476 relief valve replaces Hitachi parts 4479038 and 3379039 and is engineered for the hydraulic safety of ZX30 mini excavators. Providing consistent performance under variable loads, this valve is ideal for aftermarket distribution and service applications. Request your quote today to secure OEM-quality parts with B2B pricing.
Part number: 4654858 Product name: the main relief valve Model: ZX240-3, ZX240-3-HCMC, ZX250H-3, ZX250K-3, ZX250LC-3-HCMC, ZX250LC-3-HCME, ZX250LC-5N For Hitachi excavator […]
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