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| Parameter | Specification |
|---|---|
| COGENG Part Number | 707-99-57200 |
| OEM Reference | Komatsu 707-99-57200 |
| Application | Arm Cylinder Seal Kit |
| Rod Diameter | 95mm |
| Bore Diameter | 135mm |
| Maximum Operating Pressure | Up to 35 MPa (5,076 PSI) |
| Temperature Range | -40°C to +120°C (-40°F to +248°F) |
| Primary Seal Material | HNBR / Polyurethane (PU) |
| Seal Hardness | 85-95 Shore A (component specific) |
| Fluid Compatibility | AW32, AW46, AW68 hydraulic oils, synthetic fluids |
| Service Life | 4,000-6,000 hours in typical excavator service |
| Kit Contents | Complete set of piston seals, rod seals, wipers, O-rings, backup rings, wear bands |
| Component | COGENG Part Number | Material | Hardness | Special Features |
|---|---|---|---|---|
| Arm Piston Seal | CG-APS-57200-01 | HNBR w/ Reinforcement | 88 ± 3 Shore A | High-pressure, low compression set |
| Arm Rod Seal | CG-ARS-57200-01 | Polyurethane (PU) | 90 ± 3 Shore A | Low stiction, high wear resistance |
| Heavy-Duty Wiper | CG-HDW-57200-01 | Dual-density PU | 94/82 Shore A | Triple-lip contamination control |
| Arm Wear Bands | CG-AWB-57200-01 | Bronze-PTFE Composite | 60 ± 5 Shore D | Self-lubricating, high load capacity |
| Backup Rings | CG-BKR-57200-01 | Glass-filled PTFE | N/A | Anti-extrusion protection |
| Static O-Rings | CG-OR-57200-01 | FKM (Grade 75) | 75 ± 5 Shore A | High-temperature resistance |
| Gland Seal Kit | CG-GSK-57200-01 | HNBR Composite | 85 ± 3 Shore A | Complete gland sealing solution |
| Model | Serial Number Range | Application Notes |
|---|---|---|
| PC410-5 | S/N 10001-UP | Arm cylinder - primary fitment |
| PC400-5 | S/N 20001-UP (Overseas Version) | Arm cylinder - full compatibility |
| PC400-5 | S/N 10351-UP | Arm cylinder - full compatibility |
| PC400-6 | S/N 30001-UP | Arm cylinder - full compatibility |
| PC400-6Z | S/N 30001-UP | Arm cylinder - Excel Spec. models |
| PC400LC-5 | S/N 10351-UP | Arm cylinder - Long undercarriage |
| PC400LC-6 | S/N 30001-UP | Arm cylinder - Long undercarriage |
| PC410LC-5 | S/N 10001-UP | Arm cylinder - Long undercarriage |
| PC400-5C | S/N 20001-UP | Arm cylinder - Custom Spec. |
| PC400-6Z | S/N 30001-UP (Excel Spec.) | Arm cylinder |
| PC400ST-6 | S/N 10001-UP | Arm cylinder - Special track model |
| Model | Notes |
|---|---|
| PC200-5 | Verified by multiple sources |
| PC200-6 | Verified by multiple sources |
| PC210-6 | Verified fitment |
| PC220-5 | Verified by multiple sources |
| PC400-5C | Custom Specification models |
| PC400HD-5K | Heavy-duty models |
Workspace Cleanliness: ISO 4406 Class 8/7/5 minimum for hydraulic work
Required Tools: Torque wrench (calibrated), seal installation tools, clean solvent
Safety: Complete hydraulic system depressurization, equipment properly supported
Disassembly:
Photograph cylinder before disassembly
Label all components with orientation
Measure and record critical clearances
Inspection:
Check 95mm rod for scoring or chrome damage
Verify 135mm bore condition
Inspect all sealing grooves
Installation:
Install wear bands (heat to 70°C if necessary)
Install piston seals using installation cone
Install rod seals with alignment sleeve
Assemble gland with proper orientation
Install wiper (outer lip facing environment)
| Component | Torque Value |
|---|---|
| Gland Nuts | 300-450 N·m (221-332 ft-lbs) |
| Port Connections | 150-220 N·m (111-162 ft-lbs) |
| Mounting Pins | 400-600 N·m (295-443 ft-lbs) |
| Stage | Pressure | Duration | Check |
|---|---|---|---|
| 1 | 5 MPa (725 PSI) | 10 minutes | Initial leak check |
| 2 | 15 MPa (2,176 PSI) | 15 minutes | Operational check |
| 3 | 25 MPa (3,626 PSI) | 15 minutes | Full pressure test |
| 4 | 35 MPa (5,076 PSI) | 5 minutes | Maximum pressure test |
COGENG hydraulic seal kits are manufactured under strict quality control standards:
Material Certification: Full traceability on all raw materials
Dimensional Verification: ±0.01mm tolerance on critical dimensions
Performance Testing: Pressure cycle tested to OEM standards
ISO Compliance: ISO 9001:2015 certified manufacturing process
