| Parameter | Specification | Testing Standard |
|---|---|---|
| Maximum Operating Pressure | 32 MPa (4,640 PSI) | ISO 10766 |
| Burst Pressure Rating | 64 MPa (9,280 PSI) | ISO 10766 |
| Continuous Temperature Range | -35°C to +115°C (-31°F to +239°F) | ASTM D2000 |
| Shock Load Capacity | Up to 45 MPa (6,525 PSI) for 0.5 sec pulses | ISO 10767-1 |
| Seal Material Density | 1.28-1.32 g/cm³ | ASTM D792 |
| Compression Set | ≤ 12% (22 hours @ 100°C) | ASTM D395 Method B |
| Abrasion Resistance | ≤ 80 mm³ loss (Taber Abrasion, H-18 wheel) | ASTM D4060 |
| Tensile Strength | ≥ 16 MPa (2,320 PSI) | ASTM D412 |
| Elongation at Break | ≥ 300% | ASTM D412 |
| Volume Swell | ≤ 8% in mineral oil (7 days @ 100°C) | ASTM D471 |
| Coefficient of Friction | 0.15-0.22 (against hard chrome) | ASTM D1894 |
| Thermal Conductivity | 0.28 W/m·K | ASTM E1225 |
| Specific Heat Capacity | 1.9 kJ/kg·K | ASTM E1269 |
| Low-Temperature Flexibility | -45°C (-49°F) TR-10 | ASTM D1329 |
| Component | COGENG Part No. | Material Composition | Hardness (Shore A) | Special Features | Quantity |
|---|---|---|---|---|---|
| Blade Lift Piston Seal | CG-BLPS-14930-01 | HNBR with Aramid Fiber Reinforcement | 88 ± 2 | Integrated wear sensor groove | 2 |
| Blade Tilt Rod Seal | CG-BTRS-14930-01 | Polyurethane (AU) with Carbon Filler | 92 ± 3 | Pressure-compensating dual-lip | 2 |
| Angle Cylinder Piston Seal | CG-ACPS-14930-01 | HNBR with PTFE Impregnation | 86 ± 2 | Low-friction surface treatment | 2 |
| Main Rod Wiper Assembly | CG-MRWA-14930-01 | Polyurethane (EU) + Nitrile Felt | 95 ± 3 / N/A | Triple-stage contamination exclusion | 1 |
| Backup Ring Set | CG-BRS-14930-01 | Glass/Carbon Filled PTFE | 83 ± 5 (Shore D) | Split design with interlock feature | 6 |
| Wear Band Set | CG-WBS-14930-01 | Bronze-Filled PTFE | 58 ± 5 (Shore D) | Pre-lubricated with dry film | 4 |
| Static O-Ring Kit | CG-ORK-14930-01 | Fluorocarbon (FKM) Grade 75 | 75 ± 5 | Color-coded by size | 12 |
| Gland Seal Kit | CG-GSK-14930-01 | HNBR with Nomex® Backing | 82 ± 3 | Anti-rotation locking tab | 1 |
| Cushion Seal | CG-CS-14930-01 | Thermoplastic Polyurethane | 90 ± 2 | Energy-absorbing honeycomb design | 1 |
| Anti-Extrusion Rings | CG-AER-14930-01 | PEEK with Graphite | 87 ± 5 (Shore D) | High-pressure (>25 MPa) applications | 4 |
| Scraper Ring | CG-SR-14930-01 | Polyurethane (PU) | 94 ± 3 | Replaceable cartridge design | 1 |
| Komatsu Model | Serial Number Prefix | Specific Cylinder Application | Kit Variant | Additional Notes |
|---|---|---|---|---|
| D31EX-21A | 15001 and up | Blade Lift Cylinder (Front) | 707-99-14930-A | Requires wear band kit CG-WBK-31A |
| D31EX-21A | 15001 and up | Blade Tilt Cylinder (Left/Right) | 707-99-14930-B | Includes side-load compensators |
| D31PX-21A | 16001 and up | Blade Lift Cylinder (Front) | 707-99-14930-A | Same as D31EX-21A |
| D31PX-21A | 16001 and up | Blade Angle Cylinder | 707-99-14930-C | Different piston design |
| D37EX-21A | 17001 and up | Blade Lift Cylinder (Main) | 707-99-14930-D | Larger bore size |
| D37EX-21A | 17001 and up | Blade Tilt Cylinder | 707-99-14930-E | Heavy-duty variant |
| D37PX-21A | 18001 and up | Blade Lift Cylinder (Main) | 707-99-14930-D | Same as D37EX-21A |
| D37PX-21A | 18001 and up | Ripper Lift Cylinder | 707-99-14930-F | Optional attachment |
| D39EX-21A | 19001 and up | Blade Lift Cylinder | 707-99-14930-G | Requires adapter kit |
| NO | Number | Name | Qty |
| 707-99-14930 | SERVICE KIT | 2 | |
| 707-00-0A032 | CYLINDER ASS'Y | 2 | |
| 707-00-0A033 | CYLINDER ASS'Y | ||
| 1 | 707-11-75321 | • CYLINDER | 1 |
| 2 | 02896-11009 | • O-RING (KIT) | 2 |
| 3 | 114-63-55170 | • BUSHING | 1 |
| 4 | 04065-06220 | • RING,SNAP | 2 |
| 5 | 07020-00900 | • FITTING,GREASE | 1 |
| 6 | 707-29-75550 | • HEAD,CYLINDER | 1 |
| 7 | 707-52-90150 | • BUSHING | 1 |
| 8 | 707-51-40030 | • PACKING,ROD (KIT) | 1 |
| 9 | 707-51-40640 | • RING,BUFFER (KIT) | 1 |
| 10 | 707-56-40580 | • SEAL,DUST (KIT) | 1 |
| 11 | 07179-12052 | • RING,SNAP | 1 |
| 12 | 07000-12070 | • O-RING (KIT) | 1 |
| 13 | 707-35-52760 | • RING,BACK-UP (KIT) | 1 |
| 14 | 07000-12075 | • O-RING (KIT) | 1 |
| 15 | 721-58-40930 | • ROD,PISTON | 1 |
| 16 | 114-63-55170 | • BUSHING | 1 |
| 17 | 04065-06220 | • RING,SNAP | 2 |
| 18 | 07020-00900 | • FITTING,GREASE | 1 |
| 19 | 707-36-75370 | • PISTON | 1 |
| 20 | 707-44-75180 | • RING,PISTON (KIT) | 1 |
| 21 | 707-39-75190 | • RING,WEAR (KIT) | 1 |
| 22 | 707-67-30030 | • NUT | 1 |
Workspace Standards: Maintain ISO 4406 Class 9/8/6 cleanliness minimum
Special Tool Requirements:
COGENG Installation Sleeve P/N CG-IS-14930 (mandatory for rod seals)
Torque wrench calibrated to ±3% accuracy
Surface profilometer for finish verification
Environmental Conditions:
Temperature: 18-28°C (64-82°F)
Humidity: <60% RH
Lighting: Minimum 500 lux at work surface
⚠️ IMMEDIATE REPLACEMENT REQUIRED if:
Cylinder bore scoring >0.05mm depth
Rod chrome peeling or corrosion >10% surface area
Piston groove wear >0.1mm radial clearance
⚠️ DO NOT USE WITH:
Phosphate ester fluids (Skydrol-type)
Water-in-oil emulsions >40% water content
Operating temperatures sustained above 120°C
⚠️ MANDATORY REPLACEMENT ITEMS (not included):
All fasteners (use Class 10.9 or higher)
Port O-rings (system side)
Breather filters
