| Parameter | Specification | Testing Standard |
|---|---|---|
| Operating Pressure Range | 5-22 MPa (725-3,191 PSI) | ISO 10766 |
| Temperature Range | -30°C to +100°C (-22°F to +212°F) | ASTM D2000 |
| Bore Diameter (D20A PAT Specific) | 65mm (±0.015mm) | ISO 286-2 |
| Rod Diameter (D20A PAT Specific) | 35mm (-0/+0.010mm) | ISO 286-2 |
| Stroke Length | 280mm (D20A PAT specific) | Komatsu specification |
| Seal Material Hardness | 82-90 Shore A (component specific) | ASTM D2240 |
| Pressure Cycle Rating | 150,000 cycles at 18 MPa | ISO 10767-1 |
| Friction Coefficient | 0.15-0.23 (optimized for PAT operation) | ASTM D1894 modified |
| Contaminant Exclusion | >94% efficiency for >15µm particles | ISO 4548-12 |
| Drift Rate | ≤3 mm/minute at 18 MPa | Proprietary test method |
| Abrasion Resistance | ≤65 mm³ loss (Taber, CS-17 wheel) | ASTM D4060 |
| Thermal Conductivity | 0.24-0.30 W/m·K | ASTM E1225 |
| Service Life | 2,500-4,000 hours in typical D20A service | Field validation data |
| Response Time | <0.5 seconds for full angle/tilt adjustment | Field validation data |
| Component | COGENG Part Number | Material | Dimensions | Special Features | Quantity |
|---|---|---|---|---|---|
| PAT Piston Seal | CG-PPS-23030-01 | HNBR with reinforcement | ID: 65mm (D20A specific) | Compact design for PAT system | 2 |
| PAT Rod Seal | CG-PRS-23030-01 | Polyurethane (EU) | ID: 35mm (D20A specific) | Low friction, moderate pressure | 2 |
| Compact PAT Wiper | CG-CPW-23030-01 | Dual-density PU | Wiper specific | Double-lip for small dozer conditions | 1 |
| PAT Wear Bands | CG-PWB-23030-01 | Bronze-PTFE composite | Width: 10mm | Reduced width for compact cylinder | 2 |
| PAT Backup Rings | CG-PBR-23030-01 | Glass-filled PTFE | Groove specific | Standard anti-extrusion protection | 4 |
| Component | Function | Material | D20A PAT Specification |
|---|---|---|---|
| Angle-Tilt Compensator | Adjusts seal pressure for combined movements | Microcellular PU | 84 ± 3 Shore A |
| Compact Guide System | Maintains alignment in limited space | Oil-impregnated bronze | 0.08-0.15mm oil capacity |
| PAT Impact Cushion | Protects during angle/tilt adjustments | Energy-absorbing TPU | 0.25 second activation |
| PAT Linkage Seal | Pivot point protection for compact linkage | HNBR with fabric backing | D20A specific PAT linkage |
| Component Type | Material Specification | Quantity | D20A PAT Application |
|---|---|---|---|
| Static O-Rings | FKM (Grade 70) | 6 | Hydraulic connections |
| Port Seals | HNBR with anti-extrusion | 4 | High-pressure PAT ports |
| Gland Gasket | Fiber-reinforced composite | 1 | Gland interface sealing |
| Thread Sealant | PTFE paste | 1 kit | Fitting installation |
| Retaining Clips | Spring steel | 2 | Component retention |
| Komatsu Model | Serial Number Range | PAT System Type | Kit Compatibility |
|---|---|---|---|
| D20A with PAT | 200001-205000 | Early PAT system | Full compatibility |
| D20A with PAT | 205001-210000 | Updated PAT design | Verify linkage compatibility |
| D20A without PAT | All | Standard tilt system | NOT COMPATIBLE |
| D20-21A-6 | Different model | Different system | NOT COMPATIBLE |
| System Component | D20A PAT Specification | Function |
|---|---|---|
| PAT Cylinder | Single cylinder design | Combined angle and tilt |
| Control Valve | PAT specific spool | Simultaneous control |
| Linkage System | Complex mechanical linkage | Transfers cylinder motion |
| Hydraulic Circuit | PAT specific plumbing | Provides hydraulic power |
| Production Period | Key Changes | Kit Adaptation Required |
|---|---|---|
| Early D20A PAT | Standard PAT mechanism | Standard kit 707-98-23030 |
| Mid-Production PAT | Enhanced linkage design | Kit includes updated seals |
| Current PAT | Updated hydraulic system | Verify hose connection compatibility |
| Blade Type | PAT Compatibility | Additional Requirements |
|---|---|---|
| Standard PAT Blade | Full compatibility | Standard installation |
| Wide PAT Blade | Verify compatibility | May require adjustment |
| Non-PAT Blade | Not applicable | Different cylinder required |
| Specialty Blades | Verify with manufacturer | May require adaptation |
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