| Parameter | Value / Specification |
|---|---|
| Pressure Rating | Up to 5,000 PSI (345 bar) |
| Temperature Range | -40°F to 225°F (-40°C to 107°C) |
| Fluid Compatibility | Petroleum-based hydraulic oils, synthetic fluids, Komatsu Super Hydraulic Fluid (KSHV) |
| Primary Seal Materials | Polyurethane (AU/CU), Nitrile Rubber (NBR), PTFE composites |
| Seal Hardness (Dynamic) | 88-94 Shore A (Polyurethane) |
| Seal Hardness (Static) | 70 Shore A (NBR O-Rings) |
| Manufacturing Standards | ISO 3601, AS568A, ISO 7425 |
| Quality Assurance | Manufactured to meet or exceed original Komatsu technical specifications |
| Komatsu Part Number | COGENG Replacement | Component Category |
|---|---|---|
| 707-99-34600 | 707-99-34600 | Hydraulic Cylinder Group |
| Compatibility Note: | The "99" in the part number often refers to specific machine series or model subcategories The exact equipment application must be verified through Komatsu's official parts documentation or Electronic Parts Catalog (EPC) before purchase |
| Component Name | Material Specification | Standard | Primary Function |
|---|---|---|---|
| Piston Seal | Premium Polyurethane | ISO 7425-1 | Main dynamic pressure seal; maintains pressure between cylinder chambers |
| Rod Seal | Cast Polyurethane Composite | ISO 6547 | Primary rod sealing; prevents hydraulic oil from leaking out of the cylinder |
| Wiper/Scraper | Heavy-Duty Polyurethane | ISO 6195 | Contaminant exclusion; blocks dirt and debris from entering the cylinder |
| Wear Ring/Guide Band | Reinforced PTFE | - | Piston/rod guidance; keeps moving parts aligned and prevents metal-to-metal contact |
| Buffer Ring | Polyurethane (CU) | - | Absorbs pressure spikes and extends rod seal life |
| O-Ring Set | Nitrile Rubber (NBR) | AS568A/ISO 3601 | Static sealing for gland, end cap, ports, and fittings |
| Backup Rings | Engineering-Grade Nylon | - | Anti-extrusion protection for high-pressure applications |
| Special Seals | As per OEM design | - | Application-specific seals for particular cylinder configurations |
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