71400137 Seal Kit for Hitachi Excavator FH220 FH300
71400137 Seal Kit Product Overview
The 71400137 Seal Kit is a precision-engineered replacement sealing solution designed exclusively for Hitachi excavator hydraulic cylinders repair.
Technical Specifications
| Compatible Models | Hitachi FH220-1/FH220-2 • FH300-1/FH300-2 |
| Target Components | Boom, Arm, and Bucket Cylinders |
| Pressure Range | 0–35 MPa (5,075 PSI) – Matches Hitachi hydraulic system specs |
| Temperature Tolerance | -30°C to +110°C (-22°F to +230°F) – Validated for extreme conditions |
| Dynamic Seals Material | Hydrogenated Nitrile (HNBR) – Resists abrasion (ASTM D5963 Grade M) |
| Static Seals Material | Fluorocarbon (FKM) O-Rings – For high-pressure ports (ISO 3601-1 Class A) |
| Guide Rings | Glass-Fiber Reinforced PTFE – Reduces friction (Coefficient: 0.02–0.08) |
Seal Kit Components
| 1. HNBR Piston Seal (Step Design) | Maintains pressure integrity under 35 MPa dynamic loads. |
| 2. Double-Action Rod Seal | Prevents bidirectional leaks in ZX300-3G arm cylinders. |
| 3. Triple-Lip Wiper | Removes silica dust/debris in mining operations. |
| 4. Low-Friction Guide Rings | PTFE-glass fiber composite minimizes stick-slip in cold climates. |
| 5. FKM Static Seals | Seals flange connections against pressure spikes. |
| 6. Anti-Extrusion Sets | Prevents HNBR seal deformation during shock loads. |
Key Features
✅ Exact Hitachi Fit: CNC-machined to ZX220-5G/ZX300-3G factory drawings.
✅ Mining-Grade Durability: HNBR withstands 10,000+ cycles in abrasive soil.
✅ Leak-Free Performance: Multi-cavity rod seals exceed ISO 10766-1 leakage standards by 40%.
✅ Cost Efficiency: 50% longer lifespan vs. generic kits.
Frequently Asked Questions (FAQ)
Q: Do you have any other excavator model repair seal kits ?
A: Yes. As the professional excavator seal kits manufacturer, we produce all the excavators repair seal kits, standard sizes and also support customization. Please tell us the part number seal kit you want.
Q: I can’t find the model I want. Are all your seal repair kits here?
A: No. We have more than tens of thousands seal kits. Here only a small part of them is shown. We have stock of all the seal kits for construction machinery. Please contact us!
Contact Us
For more information or to request a quote, please contact us or email [email protected].
