71400214 Hydraulic Boom Seal Kit for Hitachi Excavator
Product Overview
The 71400214 Hydraulic Boom Seal Kit is a precision-engineered OEM-equivalent sealing solution designed specifically for Hitachi excavator boom cylinders. This kit ensures leak-free operation, restores hydraulic performance, and extends the service life of boom cylinders in demanding construction, mining, and earthmoving applications.
71400214 Seal Kit Technical Specifications
| Compatible Models | Hitachi FH120/FH220 |
| Target Component | Boom Cylinder Repair |
| Pressure Range | 0–35 MPa (5,075 PSI) – Matches Hitachi hydraulic system specifications |
| Temperature Tolerance | -30°C to +120°C (-22°F to +248°F) – Validated for extreme conditions |
| Dynamic Seals Material | Hydrogenated Nitrile (HNBR) – High abrasion resistance (ASTM D5963 Grade M) |
| Static Seals Material | Fluorocarbon (FKM) O-Rings – ISO 3601-1 Class A (Shore A 80±5 hardness) |
| Guide Components | Bronze-Filled PTFE – Low friction |
Seal Kit Components
| 1. HNBR Piston Seal (Step Design) | Maintains hydraulic pressure integrity under 35 MPa dynamic loads. |
| 2. Dual-Lip Rod Seal (HNBR) | Prevents external leaks and contamination ingress. |
| 3. Heavy-Duty Wiper (Polyurethane) | Removes abrasive particles (dust, mud) during rod retraction. |
| 4. PTFE-Bronze Guide Rings | Minimizes friction and wear in boom pivot points. |
| 5. FKM Port Seals | Ensures leak-proof hydraulic connections under pressure spikes. |
| 6. Anti-Extrusion Backup Rings | Reinforces primary seals against shock loads. |
Key Features
✅ OEM-Identical Fit: CNC-machined to standard specifications.
✅ Extended Durability: HNBR seals resist wear in abrasive soil.
✅ Zero-Leak Performance: Multi-lip rod seal design exceeds ISO 10766-1 leakage standards by 45%.
✅ Cost-Effective Repair: 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].
