707-99-45230 Hydraulic Seal Kit for Komatsu Excavator PC200-7 Bucket Cylinder Repair
707-99-45230 Seal Kit Product Overview
The 707-99-45230 Hydraulic Seal Kit is a genuine Komatsu-equivalent repair solution engineered exclusively for Komatsu PC200-7 Excavators bucket cylinders (including PC200LC-7). This hydraulic seal kit restores factory sealing performance for critical excavation tasks, preventing hydraulic leaks during digging/loading operations.
707-99-45230 Seal Kit Technical Specifications
| Komatsu Models | PC200-7, PC200LC-7 (Bucket Cylinder repair) |
| Cylinder Dimensions | Rod: 55mm (2.17″) |
| Pressure Rating | 34.3 MPa (4,975 PSI) – Compliant with Komatsu Standards |
| Temperature Range | -30°C to +110°C (-22°F to +230°F) – Validated per Komatsu Service Bulletin SEB-07 |
| Seal Materials | U-Cup: Polyurethane (AU) |
| Critical Components | HNBR O-Rings, Anti-Extrusion Rings (62% Glass Fiber PTFE), Bronze Guide Band |
The Hydraulic Seal Kit Main Components
| 1. Dual-Action U-Cup (AU) | Pressure-activated sealing for 25MPa – directional groove design prevents roll failure. |
| 2. PTFE Buffer Ring | Blocks U-Cup extrusion under side loads (>15,000 cycles at 80° rod angle) |
| 3. Multi-Lip Wiper (PU) | Komatsu-specific 3-lobe purple compound – removes abrasive clay/sand slurry |
| 4. Low-Friction Guide Band | Sintered bronze with PTFE coating – reduces rod scoring risk by 70% vs. nylon. |
| 5. O-Rings (HNBR) | High-pressure Nitrile compound resists bio-oil swelling. |
| 6. Anti-Wear Rings | Prevents gland housing damage during dynamic misalignment. |
Key Features
✅ Precision Fit for PC200-7: Direct OEM replacement for Komatsu Excavator PC200-7 Bucket Cylinder Repair
✅ Digging Force Resilience: Withstands 34.3MPa peak pressure
✅ Abrasion Resistance: Polyurethane seals outlast rubber 300% in sand/gravel environments
✅ Tight Contaminant Seal: Dual-stage wiper clears particles >25 microns – essential for mining/construction
✅ Zero-Temperature Failures: -30°C flexibility prevents cracking in cold-climate operation
✅ Komatsu-Specific Chemistry: Compatible with Komatsu standard
Frequently Asked Questions (FAQ)
Q: Do you have any other excavator model repair seal kits ?
A: Yes. As the professional excavator seal kits manufacturer, DJF 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!
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