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Hitachi 4443596 Hydraulic Return Filter Cartridge for Excavators
Product Quality Assurance
- Cast Handle Top Cap: Designed with an integrated heavy-duty top handle to facilitate quick extraction and seamless serviceability during hydraulic reservoir maintenance.
- Integral Pressure Relief Safety: Features a built-in safety bypass valve calibrated to open under surge pressures or cold-start conditions, guarding the system against fluid starvation.
- Reinforced Perforated Outer Shell: Wrapped in a rigid, corrosion-resistant metallic casing that stabilizes pleat alignment under heavy fluid velocity and pressure spikes.
Technical Specifications
| Parameter Standard | Operational Specification |
|---|---|
| Component Category | Hydraulic Return Tank Element |
| Primary OEM Part Number | Hitachi 4443596 |
| Interchange Reference | Fleetguard HF35511, HiFi Filter SH 60151 |
| Top Outer Diameter (D1) | 112.0 mm |
| Mid Outer Diameter (D2) | 74.0 mm |
| Bottom Inner Diameter (D3) | 57.0 mm |
| Overall Height (H1) | 527.0 mm |
| Filter Cartridge Length (H2) | 510.0 mm |
| Effective Height (H3) | 484.0 mm |
| Minimum Order Quantity (MOQ) | 20 Units |
| Recommended Service Life | 1000 Operating Hours |
Frequently Asked Questions (FAQ)
Q1: Which specific heavy equipment models utilize the Hitachi 4443596 filter?
This hydraulic cartridge is engineered for Hitachi Zaxis series excavators, wheel loaders, and Sany machinery:
- Hitachi Zaxis Series: ZX 75 US-3, ZX 75 US-A, ZX 75 USK-3, ZX 80, ZX 85 US-3, ZX 85 USB-3, ZX 85 USB-5A, ZX 85 USB-6, ZX 95 US-7, ZX 110-3, ZX 130-3 LC, ZX 130 W, ZX 135 US-3/6/7, ZX 140 W-6, ZX 145 W-6, ZX 160 LC, ZX 180 LC/LCN, ZW 135 US, ZW 180-5 B, ZW 180-6.
- Sany Excavators: SY 75 C.
- Hitachi Zaxis Series: ZX 75 US-3, ZX 75 US-A, ZX 75 USK-3, ZX 80, ZX 85 US-3, ZX 85 USB-3, ZX 85 USB-5A, ZX 85 USB-6, ZX 95 US-7, ZX 110-3, ZX 130-3 LC, ZX 130 W, ZX 135 US-3/6/7, ZX 140 W-6, ZX 145 W-6, ZX 160 LC, ZX 180 LC/LCN, ZW 135 US, ZW 180-5 B, ZW 180-6.
- Sany Excavators: SY 75 C.
Q2: Is the 4443596 element directly interchangeable with Fleetguard HF35511?
Yes, it is a 100% direct dimensional and functional cross-reference match for Fleetguard HF35511 and HiFi Filter SH 60151, requiring no housing modifications.
Q3: Why is a built-in bypass valve essential for this hydraulic filter?
The integrated bypass valve ensures uninterrupted oil flow back to the reservoir during extreme low temperatures or when the media reaches full dust capacity, preventing pump cavitation.
Q4: What is the wholesale Minimum Order Quantity (MOQ) for overseas distributors?
Our base order requirement is 20 pieces, supporting mixed-model container consolidation for spare parts wholesalers.
Q5: How can I submit a bulk RFQ for international shipment?
Inquiries can be submitted directly to our export team at Sales@enginegensetparts.com or via WhatsApp / WeChat at +86 13328990097.
Quality Inspection Process
- Handle & Structural Tensile Check: Mechanical load testing on the cast top handle to guarantee structural durability during extraction.
- Bypass Valve Calibration Audit: Precision bench testing of the internal bypass valve spring setting to verify exact opening pressure response.
- Adhesive Thermal Endurance Test: High-temperature oil immersion tests to confirm the epoxy bond between metal caps and pleated filter media remains intact.
- Final Dimensional & Seal Verification: Caliper checking of all three height dimensions (527mm H1) and outer diameters before shrink-wrapping for export shipping.
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