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| Parameter | Specification | Testing Standard |
|---|---|---|
| Operating Pressure | 8-28 MPa (1,160-4,061 PSI) | ISO 10766 |
| Angle-Specific Load Range | ±15° at 25 MPa side load | SAE J1516 modified |
| Temperature Range | -35°C to +115°C (-31°F to +239°F) | ASTM D2000 |
| Cylinder Stroke | 380mm (D39EX-23 specific) | Komatsu specification |
| Bore Diameter | 90mm (±0.020mm) | ISO 286-2 |
| Rod Diameter | 50mm (-0/+0.012mm) | ISO 286-2 |
| Seal Material Hardness | 85-92 Shore A (dynamic) | ASTM D2240 |
| Friction Profile | 0.10-0.18 (angle-dependent) | COGENG Test Method AG-22300 |
| Pressure Cycle Rating | 300,000 cycles at 20 MPa | ISO 10767-1 |
| Angular Misalignment | Accommodates ±3° continuous | ISO 6020-2 |
| Contaminant Exclusion | >95% efficiency for >15µm particles | ISO 4548-12 |
| Leakage Rate | ≤1 ml/hour at 25 MPa, 15° angle | ISO 10766 |
| Response Time | <0.5 seconds for 10° angle change | Field validation data |
| Component | COGENG Part Number | Material Composition | Hardness | Angle-Specific Feature | Quantity |
|---|---|---|---|---|---|
| Angle Piston Seal | CG-APS-22300-01 | HNBR with Aramid reinforcement | 88 ± 2 Shore A | Asymmetric lip for angle loads | 2 |
| Angle Rod Seal | CG-ARS-22300-01 | Polyurethane (EU) with graphite | 90 ± 3 Shore A | Bidirectional flow optimized | 2 |
| Angular Wiper Assembly | CG-AWA-22300-01 | Dual-density PU with scraper | 92/84 Shore A | Wide-angle contamination exclusion | 1 |
| Angle Wear Bands | CG-AWB-22300-01 | Bronze-PTFE-Carbon composite | 65 ± 5 Shore D | Extra width (18mm) for stability | 2 |
| Side-Load Backup Rings | CG-SLB-22300-01 | Glass-PEEK composite | 82 ± 5 Shore D | Variable thickness for angle compensation | 4 |
| Component | Function | Material | D39EX-23 Specification |
|---|---|---|---|
| Angle Guide Ring | Maintains alignment during angle changes | Oil-impregnated bronze | 0.12-0.18mm oil capacity |
| Angle Compensator | Adjusts seal pressure with angle | Microcellular PU | 15° progressive compensation |
| Quick-Response Cushion | Rapid angle change protection | Energy-absorbing TPU | 0.2 second activation |
| Linkage Seal | Pivot point protection | HNBR with fabric backing | D39 specific linkage geometry |
| Component Type | Material Specification | Quantity | D39EX-23 Application |
|---|---|---|---|
| Static O-Rings | FKM (Grade 70) | 6 | Hydraulic connections |
| Port Seals | HNBR with anti-extrusion | 4 | High-pressure angle ports |
| Gland Gasket | HNBR composite | 1 | Gland interface sealing |
| Thread Sealant | PTFE paste | 1 kit | Fitting installation |
| Retaining Clips | Spring steel | 2 | Component retention |
| NO | Number | Name | Qty |
| K01 | 707-99-14990 | Seal Kit, Hydraulic Cylinder | |
| 02896-61009 | • O-ring | 2 | |
| 07000-12075 | • O-ring | 1 | |
| 07000-B2070 | • O-ring | 1 | |
| 07145-00040 | • Seal, Dust | 4 | |
| 203-32-51241 | • Bolt | 50 | |
| 203-32-61220 | • Nut | 50 | |
| 707-35-10710 | • Ring, Back-up | 1 | |
| 707-39-75190 | • Ring, Wear | 1 | |
| 707-44-75150 | • Ring, Piston | 1 | |
| 707-51-40650 | • Ring, Buffer | 1 | |
| 707-51-40860 | • Packing, Rod | 1 | |
| 707-56-40740 | • Seal, Dust | 1 | |
| K02 | 707-99-22300 | Seal Kit, Hydraulic Cylinder | |
| 02896-61009 | • O-ring | 2 | |
| 07000-12080 | • O-ring | 1 | |
| 07000-13035 | • O-ring | 4 | |
| 07000-B2075 | • O-ring | 1 | |
| 07156-00810 | • Ring, Wear | 2 | |
| 707-35-10760 | • Ring, Back-up | 1 | |
| 707-44-80150 | • Ring, Piston | 1 | |
| 707-51-40650 | • Ring, Buffer | 1 | |
| 707-51-40860 | • Packing, Rod | 1 | |
| 707-56-40740 | • Seal, Dust | 1 | |
| K03 | 707-99-22310 | Service Kit, Hydraulic Cylinder | |
| 02896-61009 | • O-ring | 3 | |
| 07000-12060 | • O-ring | 1 | |
| 07000-12080 | • O-ring | 1 | |
| 07000-13035 | • O-ring | 4 | |
| 07000-B2075 | • O-ring | 1 | |
| 07156-00810 | • Ring, Wear | 2 | |
| 707-34-60080 | • O-ring | 1 | |
| 707-35-10760 | • Ring, Back-up | 1 | |
| 707-44-80150 | • Ring, Piston | 1 | |
| 707-51-40650 | • Ring, Buffer | 1 | |
| 707-51-40860 | • Packing, Rod | 1 | |
| 707-56-40740 | • Seal, Dust | 1 | |
| K04 | 707-99-15770 | Service Kit, Hydraulic Cylinder | |
| 02896-61009 | • O-ring | 2 | |
| 07000-12060 | • O-ring | 1 | |
| 07000-12075 | • O-ring | 1 | |
| 07000-B2070 | • O-ring | 1 | |
| 07145-00040 | • Seal, Dust | 4 | |
| 707-34-60080 | • O-ring | 1 | |
| 707-35-10710 | • Ring, Back-up | 1 | |
| 707-39-75190 | • Ring, Wear | 1 | |
| 707-44-75150 | • Ring, Piston | 1 | |
| 707-51-40650 | • Ring, Buffer | 1 | |
| 707-51-40860 | • Packing, Rod | 1 | |
| 707-56-40740 | • Seal, Dust | 1 | |
| K05 | 707-99-24760 | Seal Kit, Hydraulic Cylinder | |
| 02896-61008 | • O-ring | 2 | |
| 07000-12060 | • O-ring | 1 | |
| 07000-12090 | • O-ring | 1 | |
| 07000-13035 | • O-ring | 4 | |
| 07000-B2085 | • O-ring | 1 | |
| 07156-00912 | • Ring, Wear | 1 | |
| 707-34-60080 | • O-ring | 1 | |
| 707-35-10860 | • Ring, Back-up | 1 | |
| 707-44-90150 | • Ring, Piston | 1 | |
| 707-51-45650 | • Ring, Buffer | 1 | |
| 707-51-45860 | • Packing, Rod | 1 | |
| 707-56-45740 | • Seal, Dust | 1 |
⚠️ ANGLE CYLINDER SPECIFIC REQUIREMENTS:
ONLY for D39EX-23 angle cylinder - not for lift or tilt cylinders
REQUIRED: Follow Komatsu D39EX-23 service manual exactly
MANDATORY: Use blade angle lock during service
CRITICAL: Verify angle calibration after installation
⚠️ PERFORMANCE-SENSITIVE FACTORS:
Linkage condition affects seal performance
Hose routing must accommodate full angle range
Control valve adjustment may be required
Electronic angle control calibration needed
⚠️ SAFETY CONSIDERATIONS:
Blade can move unexpectedly if not properly secured
Hydraulic pressure can be retained in angle circuit
Linkage pins under tension during removal
Track movement possible if not properly blocked
