6664908 Swivel Joint Seal Kit for Bobcat Excavators / Loaders
6664908 Swivel Joint Seal Kit Precision Compatibility
6664908 Swivel Joint Seal Kit Certified for Bobcat compact excavators and loaders hydraulic swivel joints repair, including specialty models:
- Excavators/Loaders: 225 • 231 • 325 • 328 • 329 • 331 • 334 • 335 • 425 • 428
6664908 Seal Kit Technical Specifications
| Joint Type | High-Flow Central Swivel |
| Max Operating Pressure | 34 MPa (4,930 PSI) │ 42 MPa peak |
| Temp. Range | -40°C to +120°C (-40°F to 248°F) |
| Primary Seal Material | HNBR90 (Hydrogenated Nitrile) |
| Secondary Seals | FEP-Encapsulated O-Rings |
| Wiper Design | 3-Lip PTFE + Spring Load (ISO 10761-1) |
| Rotation Tolerance | <0.5° radial play |
Seal Kit Main Contents
| Rotary Shaft Seal (HNBR90) | 0-leak @ 42MPa reverse pressure |
| FEP V-Rings (UV-resistant) | Blocks fluid cross-contamination |
| Spring-Loaded Wiper (PTFE) | Scrapes 20μm+ debris (MIL-STD-1246C) |
| High-Pressure Backup Ring (PEEK) | Prevents extrusion in hammer mode |
| Static Housing Seals (FKM) | Seals port block interface |
Performance Advantages
✅ Zero Cross-Port Leakage: Tested 500+ hours @ 120°C with Bobcat BIO HYDO 46 fluid
✅ Hammer-Vibration Resistance: PEEK backup rings withstand 180 G-force shock pulses
✅ Arctic Performance: HNBR90 maintains elasticity at -40°C (Alaska field-proven)
✅ Corrosion Prevention: FEP encapsulation blocks acid formation from moisture ingress
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].
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