| Parameter | Specification |
|---|---|
| COGENG Part Number | 707-99-43690 |
| OEM Reference | Komatsu 707-99-43690 |
| Application | Hydraulic cylinder seal kit (blade tilt / bucket cylinder) |
| Maximum Operating Pressure | 35 MPa (5,076 PSI) |
| Temperature Range | -40°C to +120°C (-40°F to +248°F) |
| Primary Seal Material | HNBR / Polyurethane (PU) |
| Dynamic Seal Hardness | 88 ± 3 Shore A |
| Static Seal Hardness | 75 ± 5 Shore A (FKM O-rings) |
| Fluid Compatibility | AW32, AW46, AW68 hydraulic oils, synthetic fluids, biodegradable fluids |
| Compression Set | ≤ 12% (70 hours @ 110°C) |
| Tensile Strength | ≥ 18 MPa (2,611 PSI) |
| Elongation at Break | ≥ 280% |
| Friction Coefficient | 0.12-0.22 (optimized for cylinder operation) |
| Pressure Cycle Rating | 300,000 cycles at 25 MPa |
| Leakage Rate | ≤ 0.5 ml/hour at 30 MPa |
| Service Life | 4,000-6,000 hours in typical excavator/dozer service |
| Kit Contents | Complete set of piston seals, rod seals, wipers, O-rings, backup rings, wear bands, gland seals |
| Component | COGENG Part Number | Material | Hardness | Special Features | Quantity |
|---|---|---|---|---|---|
| Piston Seal | CG-PS-43690-01 | HNBR with reinforcement | 88 ± 3 Shore A | High-pressure, low compression set | 2 |
| Rod Seal (Primary) | CG-RS-43690-01 | Polyurethane (PU) | 90 ± 3 Shore A | Low stiction, high wear resistance | 2 |
| Rod Seal (Secondary) | CG-RS-43690-02 | FKM/HNBR composite | 85 ± 3 Shore A | High-temperature backup | 1 |
| Heavy-Duty Wiper | CG-HDW-43690-01 | Dual-density PU | 94/82 Shore A | Triple-lip contamination control | 1 |
| Wear Band Set | CG-WBS-43690-01 | Bronze-PTFE composite | 60 ± 5 Shore D | Self-lubricating, high load capacity | 4 |
| Backup Rings | CG-BKR-43690-01 | Glass-filled PTFE | N/A | Anti-extrusion protection | 6 |
| Static O-Rings | CG-OR-43690-01 | FKM (Grade 75) | 75 ± 5 Shore A | High-temperature resistance | 12 |
| Gland Seal Kit | CG-GSK-43690-01 | HNBR composite | 85 ± 3 Shore A | Complete gland sealing | 1 |
| Cushion Seals | CG-CS-43690-01 | Microcellular PU | 88 ± 2 Shore A | Stroke-end protection | 2 |
| Port Seals | CG-PS-43690-02 | HNBR with anti-extrusion | 80 ± 5 Shore A | High-pressure port sealing | 4 |
| Model | Series | Cylinder Application | Compatibility Status |
|---|---|---|---|
| D65EX-12 | -12 series | Blade tilt cylinder | Full compatibility |
| D65PX-12 | -12 series | Blade tilt cylinder | Full compatibility |
| D65WX-12 | -12 series | Blade tilt cylinder | Full compatibility |
| D85EX-12 | -12 series | Blade tilt cylinder | Full compatibility |
| D85PX-12 | -12 series | Blade tilt cylinder | Full compatibility |
| D85ESS-12 | -12 series | Blade tilt cylinder | Full compatibility |
| D155AX-5 | -5 series | Blade tilt cylinder | Full compatibility |
| D155AX-6 | -6 series | Blade tilt cylinder | Full compatibility |
| D275AX-5 | -5 series | Blade tilt cylinder | Full compatibility |
| D275A-5 | -5 series | Blade tilt cylinder | Full compatibility |
| Model | Series | Cylinder Application | Compatibility Status |
|---|---|---|---|
| PC200-6 | -6 series | Bucket cylinder | Verified fitment |
| PC200-7 | -7 series | Bucket cylinder | Verified fitment |
| PC200-8 | -8 series | Bucket cylinder | Verified fitment |
| PC200LC-6 | -6 series | Bucket cylinder | Verified fitment |
| PC200LC-7 | -7 series | Bucket cylinder | Verified fitment |
| PC210-6 | -6 series | Bucket cylinder | Verified fitment |
| PC210-7 | -7 series | Bucket cylinder | Verified fitment |
| PC210-8 | -8 series | Bucket cylinder | Verified fitment |
| PC220-6 | -6 series | Bucket cylinder | Verified fitment |
| PC220-7 | -7 series | Bucket cylinder | Verified fitment |
| PC228US-1 | US series | Bucket cylinder | Verified fitment |
| PC228USLC-3 | USLC series | Bucket cylinder | Verified fitment |
| Model | Verification Status | Notes |
|---|---|---|
| D65E-12 | Confirmed fitment | Blade tilt cylinder |
| D65P-12 | Confirmed fitment | Blade tilt cylinder |
| D85E-12 | Confirmed fitment | Blade tilt cylinder |
| D85P-12 | Confirmed fitment | Blade tilt cylinder |
| D155A-5 | Cross-reference verified | Blade tilt cylinder |
| D275A-5 | Cross-reference verified | Blade tilt cylinder |
| PC200-3 | Verified with adaptation | Verify bore size |
| PC200-5 | Verified with adaptation | Verify bore size |
| Cylinder Type | Typical Bore Size | Typical Rod Size | Kit Suitability |
|---|---|---|---|
| D65 Blade Tilt | 110-120mm | 65-75mm | Full compatibility |
| D85 Blade Tilt | 120-130mm | 70-80mm | Full compatibility |
| D155 Blade Tilt | 130-140mm | 80-90mm | Full compatibility |
| PC200 Bucket | 100-110mm | 60-70mm | Full compatibility |
| PC210 Bucket | 105-115mm | 65-75mm | Full compatibility |
| PC220 Bucket | 110-120mm | 70-80mm | Full compatibility |
Workspace Cleanliness: ISO 4406 Class 8/7/5 minimum for hydraulic work
Required Tools:
Torque wrench (calibrated)
Seal installation tools/cone set
Micrometer set (0-150mm range)
Dial indicator (0.001mm resolution)
Clean solvent and lint-free cloths
Safety Requirements:
Complete hydraulic system depressurization
Equipment properly supported and secured
Personal protective equipment (gloves, safety glasses)
Fire extinguisher readily available
| Inspection Point | Acceptable Limit | Action if Exceeded |
|---|---|---|
| Bore diameter | Specification ±0.05mm | Hone or replace barrel |
| Rod diameter | Specification -0/+0.03mm | Replace rod or rechrome |
| Chrome condition | No peeling, ≥0.08mm thickness | Replace rod |
| Bore scoring | ≤0.02mm depth | Polish or replace |
| Rod straightness | ≤0.05mm/500mm | Replace rod |
| Groove condition | No burrs or damage | Deburr and clean |
