71400152 Hydraulic Cylinder Seal Kit for Fiat-Hitachi Excavator Boom Bucket Cylinder Repair
Product Overview
71400152 Hydraulic Cylinder Seal Kit – Direct Factory Replacement for Fiat-Hitachi FH220/FH300 Boom & Bucket Cylinders (2008-2023 Models)
Precision Application
Certified for critical repairs on:
- Boom Cylinders: FH220-1/FH220-2 • FH300-1/FH300-2
- Bucket Cylinders: All FH220/FH300 configurations
- Cylinder Identification: Requires casting mark ”HITACHI HYD-4B”
- Exclusions: Arm cylinders (use 71400133) │ FH350 series
Technical Specifications
| Bore/Rod Size Coverage | Ø120-160mm (4.72-6.3″) / Ø80-100mm (3.15-3.94″) |
| Pressure Rating | 40 MPa (5,800 PSI) continuous │ 58 MPa surge |
| Temperature Range | -30°C to +140°C (-22°F to 284°F) |
| Primary Seal Material | HNBR90 Matrix (Hydrogenated Nitrile) |
| Dynamic Seals | Cast Polyurethane (AU95 hardness) |
| Wear Components | Bronze-PTFE Guide Bands (CoF ≤0.03) |
Seal Kit Contents
| Pressure-Actuated U-Cups | 58MPa burst resistance |
| Step Seals (HNBR90) | Zero-leak rod sealing |
| Anti-Extrusion Rings (PEEK) | 60MPa yield strength |
| Heavy-Duty Wear Bands | Oil-embedded bronze-PTFE |
| Buffer Seals (FKM) | Shock absorption for breaker ops |
Certified Performance
✅ Zero Boom Drift: Holds position within 0.8° after 24hrs
✅ Mine Duty Endurance: 16,000-hour service life in Australian iron ore operations
✅ Hammer Compatibility: Withstands 58MPa surges from Rammer G130/G150 breakers
✅ Contaminant Defense: 4-stage wiper blocks 99% >10μm particles
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].
