| Parameter | Specification | Testing Standard |
|---|---|---|
| COGENG Part Number | COGENG-707-99-35590-HSK | Internal Quality Standard QS-515 |
| Replaces OEM Part No. | Komatsu 707-99-35590 | Direct OEM Replacement |
| Primary Seal Material | Polyurethane (PU) Grade 95A | ISO 6072 |
| Secondary Seal Material | Nitrile (NBR) with PTFE fill | ISO 6072 |
| Wiper Material | Polyurethane double-lipped | ISO 6194 |
| O-Ring Material | Nitrile (NBR) 70 Durometer | ISO 3601-1 |
| Wear Ring Material | PTFE-filled composite | ISO 6811 |
| Backup Ring Material | Nylon 6.6 | ISO 1874-1 |
| Temperature Range | -40°C to +120°C (-40°F to +248°F) | ISO 2230 |
| Pressure Rating | Up to 40 MPa (5800 PSI) | ISO 10766-1 |
| Fluid Compatibility | Komatsu Super Hydraulic Fluid, mineral oil, synthetic | ISO 6743-4 |
| Shelf Life | 5 years in original packaging | ISO 2230 |
| Component | Material | Size Specification | Quantity | Function |
|---|---|---|---|---|
| Main Piston Seal | Polyurethane | 110mm ID x 8mm width | 1 | Primary pressure sealing |
| Rod Seal | NBR with PTFE | 80mm ID x 7mm width | 1 | Dynamic rod sealing |
| Buffer Seal | Polyurethane | 110mm ID x 6mm width | 1 | Pressure peak protection |
| Wiper Seal | Polyurethane double-lipped | 80.5mm ID | 1 | Contaminant exclusion |
| Wear Bands | PTFE composite | 110mm OD x 6mm width | 2 | Piston guidance |
| O-Rings | Nitrile (NBR) | Various sizes AS568 | 8 | Static sealing |
| Backup Rings | Nylon 6.6 | Various sizes | 4 | Anti-extrusion support |
| Guide Rings | PTFE-filled fabric | 110mm OD x 6mm width | 2 | Bearing surface protection |
| Gland Gasket | NBR | 85mm OD x 2.5mm CS | 1 | Gland static seal |
| Model Series | Specific Models | Cylinder Applications | Year Range |
|---|---|---|---|
| Komatsu PC130 | PC130-7, PC130-8 | Boom, Arm, Bucket Cylinders | 2003-2012 |
| Komatsu PC138 | PC138-2, PC138-3 | Main Hydraulic Cylinders | 2004-2013 |
| Komatsu PC160 | PC160-7, PC160-8 | All Hydraulic Cylinders | 2002-2011 |
| Komatsu PC200 | PC200-7, PC200-8 | Boom and Arm Cylinders | 2001-2010 |
| Parameter | Specification | Tolerance | Application |
|---|---|---|---|
| Cylinder Bore | 110 mm | +0.10/-0.00 mm | Standard cylinder size |
| Rod Diameter | 80 mm | +0.00/-0.05 mm | Chrome-plated rod |
| Operating Pressure | 34.3 MPa (350 kg/cm²) | ±2% | System design pressure |
| Burst Pressure | 68.6 MPa (700 kg/cm²) | +10% | Safety margin |
| Fluid Temperature | -20°C to +80°C | N/A | Operating range |
| NO | Number | Name | Qty |
| 707-00-0Y873 | CYLINDER, ASSEMBLY | 1 | |
| 1 | 707-76-50371 | • BUSHING | 1 |
| 2 | 707-58-60900 | • ROD, PISTON | 1 |
| 3 | 07179-12074 | • RING, BACK-UP | 1 |
| 4 | 707-29-11991 | • CYLINDER HEAD | 1 |
| 5 | 707-71-80660 | • SPACER | 1 |
| 6 | 707-36-11991 | • PISTON | 1 |
| 7 | 707-67-42010 | • NUT | 1 |
| 8 | 707-11-11C52 | • CYLINDER | 1 |
| 9 | 707-76-60170 | • BUSHING | 1 |
| 707-99-35590 | • KIT, GASKET | 1 | |
| 10 | 07145-00050 | •• SEAL, DUST | 2 |
| 11 | 141-63-93270 | •• GASKET | 1 |
| 12 | 07000-12115 | •• O-RING | 1 |
| 13 | 707-51-60030 | •• GASKET | 1 |
| 14 | 707-51-60640 | •• GASKET | 1 |
| 15 | 07000-12110 | •• O-RING | 1 |
| 16 | 707-35-91630 | •• RING, BACK-UP | 1 |
| 17 | 707-35-91610 | •• RING, BACK-UP | 2 |
| 18 | 07000-12110 | •• O-RING | 1 |
| 19 | 707-44-11280 | •• GASKET | 1 |
| 20 | 707-39-11520 | •• PACKING, ROD | 1 |
| 21 | 02896-11018 | •• O-RING | 2 |
| Performance Parameter | Value | Test Method |
|---|---|---|
| Seal Service Life | 4,000 operating hours | ISO 7983 |
| Friction Coefficient | 0.07-0.11 | ASTM D1894 |
| Extrusion Resistance | 38 MPa sustained | ISO 1829 |
| Compression Set | <13% after 24h @ 100°C | ISO 815 |
| Abrasion Resistance | >60,000 cycles | ISO 4649 |
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