| Parameter | Specification | Testing Standard |
|---|---|---|
| COGENG Part Number | COGENG-401107-00320-SK | Internal Quality Standard QS-505 |
| Replaces OEM Part No. | 401107-00320, 2440-9441KT | Direct OEM Replacement |
| Primary Seal Material | Polyurethane (PU) | ISO 6072 |
| Secondary Seal Material | Nitrile (NBR) with PTFE fill | ISO 6072 |
| Wiper Material | Polyurethane (PU) | ISO 6194 |
| O-Ring Material | Nitrile (NBR) 70 Durometer | ISO 3601-1 |
| Backup Ring Material | Nylon 6.6 | ISO 1874-1 |
| Wear Ring Material | PTFE-filled thermoplastic | ISO 6811 |
| Temperature Range | -40°C to +110°C (-40°F to +230°F) | ISO 2230 |
| Pressure Rating | Up to 40 MPa (5800 PSI) | ISO 10766-1 |
| Fluid Compatibility | Mineral oil, synthetic, HFD fluids | ISO 6743-4 |
| Shelf Life | 5 years in original packaging | ISO 2230 |
| Component | Material | Size Specification | Quantity | Function |
|---|---|---|---|---|
| Main Piston Seal | Polyurethane | 65mm ID x 5mm width | 2 | Primary pressure sealing |
| Rod Seal | NBR with PTFE | 45mm ID x 6mm width | 1 | Dynamic rod sealing |
| Buffer Seal | Polyurethane | 65mm ID x 4mm width | 1 | Pressure peak protection |
| Wiper Seal | Polyurethane double-lipped | 45.5mm ID | 1 | Contaminant exclusion |
| Wear Bands | PTFE composite | 65mm OD x 4mm width | 4 | Piston guidance |
| O-Rings | Nitrile (NBR) | Various sizes | 6 | Static sealing |
| Backup Rings | Nylon 6.6 | Various sizes | 3 | Anti-extrusion support |
| Gland Seal | NBR | 50mm OD x 2mm CS | 1 | Gland static seal |
| Model Series | Specific Models | Cylinder Application | Year Range |
|---|---|---|---|
| Doosan DX140LC | DX140LC-3, DX140LC-5 | Boom, Arm, Bucket Cylinders | 2010-2015 |
| Doosan DX180LC | DX180LC-3, DX180LC-5 | Main Hydraulic Cylinders | 2011-2016 |
| Doosan DX210LC | DX210LC-3, DX210LC-5 | Swing Motor, Travel Motor | 2012-2017 |
| Doosan DX225LC | DX225LC-3, DX225LC-5 | All Hydraulic Cylinders | 2013-2018 |
| Doosan DX255LC | DX255LC-3, DX255LC-5 | Boom and Arm Cylinders | 2014-2019 |
| Parameter | Specification | Tolerance | Application |
|---|---|---|---|
| Cylinder Bore Range | 65-80 mm | +0.05/-0.00 mm | Various cylinder sizes |
| Rod Diameter Range | 45-55 mm | +0.00/-0.03 mm | Rod seal compatibility |
| Operating Pressure | 34.3 MPa (350 kg/cm²) | ±2% | System design pressure |
| Fluid Temperature | -20°C to +80°C | N/A | Operating range |
Performance & Durability Data
| Performance Parameter | Specification | Test Method |
|---|---|---|
| Seal Service Life | 5,000 operating hours | ISO 7983 |
| Friction Coefficient | 0.06-0.10 | ASTM D1894 |
| Extrusion Resistance | 50 MPa sustained | ISO 1829 |
| Compression Set | <12% after 24h @ 100°C | ISO 815 |
| Abrasion Resistance | >50,000 cycles | ISO 4649 |
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