| Parameter | Value / Specification |
|---|---|
| Operating Pressure | Up to 5,800 PSI (400 Bar) |
| Temperature Range | -40°F to 225°F (-40°C to 107°C) |
| Fluid Compatibility | Mineral-based hydraulic oils, biodegradable fluids, standard Komatsu-approved fluids |
| Seal Material Hardness | 88-92 Shore A (Polyurethane), 70 Shore A (NBR O-Rings) |
| Surface Finish Compatibility | 10-20 µin Ra (Cylinder Bore & Rod) |
| Performance Standard | Engineered to meet Komatsu technical specifications for durability and sealing efficiency. |
| Komatsu Machine Models | Applicable Cylinder |
|---|---|
| Komatsu PC200-6, PC200-7, PC200-8 | Travel Motor (Swing Motor) Cylinder |
| Komatsu PC220-6, PC220-7 | Travel Motor (Swing Motor) Cylinder |
| Note: | This kit is specifically designed for the swing/travel hydraulic motor on the listed models. Compatibility is determined by the OEM part number 707-98-22410. Always verify your machine's model, serial number, and the specific component being serviced before installation. |
| Component Name | Material | Color | Durometer (Shore A) | Purpose |
|---|---|---|---|---|
| Main Piston Seal | Polyurethane (AU) | Brown | 90 | Dynamic pressure sealing for piston |
| Rod Seal / Buffer Ring | Cast Polyurethane (CU) | Black | 88 | Primary rod sealing & pressure containment |
| Wiper / Scraper | Polyurethane (PU) | Black | 85 | Exclusion of dirt, dust, and moisture |
| O-Rings (Various Sizes) | Nitrile Rubber (NBR) | Black | 70 | Static sealing at glands, ports, and plugs |
| Wear Rings / Guide Bands | Filled PTFE / Nylon 6.6 | Orange / White | N/A | Prevent metal contact, guide piston & rod |
| Backup Rings | Nylon | Tan | N/A | Prevent extrusion of O-rings under high pressure |
| Gasket (if applicable) | Compressed Fiber | Grey | N/A | Static seal for cover or port plate |
| NO | Number | Name | Qty |
| 21W-63-07110 | CYLINDER ASS'Y,TILT | 1 | |
| 1 | 114-63-54841 | • CYLINDER | 1 |
| 2 | 114-63-55170 | • BUSHING | 1 |
| 3 | 04065-06220 | • RING,SNAP | 2 |
| 4 | 07020-00900 | • FITTING,GREASE | 1 |
| 5 | 707-29-90910 | • HEAD,CYLINDER | 1 |
| 6 | 07177-04025 | • BUSHING | 1 |
| 7 | 707-51-40210 | • PACKING,ROD (KIT) | 1 |
| 8 | 198-63-75190 | • SEAL,DUST (KIT) | 1 |
| 9 | 07179-12052 | • RING,SNAP | 1 |
| 10 | 07000-12085 | • O-RING (KIT) | 1 |
| 11 | 07001-02085 | • RING,BACK-UP (KIT) | 1 |
| 12 | 07000-02090 | • O-RING (KIT) | 1 |
| 13 | 114-63-54820 | • ROD,PISTON | 1 |
| 14 | 114-63-55170 | • BUSHING | 1 |
| 15 | 04065-06220 | • RING,SNAP | 2 |
| 16 | 07020-00900 | • FITTING,GREASE | 1 |
| 17 | 707-81-40150 | • SPACER | 1 |
| 18 | 07000-03040 | • O-RING | 1 |
| 19 | 707-36-90920 | • PISTON | 1 |
| 20 | 707-44-90070 | • RING,PISTON (KIT) | 1 |
| 21 | 07156-00912 | • RING,WEAR (KIT) | 1 |
| 22 | 01580-02722 | • NUT | 1 |
| SERVICE KIT | |||
| K | 707-98-22410 | SERVICE KIT,TILT CYLINDER | 1 |
Safe Depressurization & Support: Fully lower the implement to the ground to relieve hydraulic pressure. Secure the cylinder rod and mechanically support the implement to prevent accidental movement.
Ultra-Clean Environment: Perform disassembly and assembly in a dedicated, clean area. Use a parts washer and lint-free wipes.
Sequential Disassembly: Carefully disassemble the gland. Document the order, orientation, and placement of every component with photos or notes.
Mandatory Metal Inspection: Use a micrometer and bore gauge to check the rod (for scratches, pitting, or scoring) and the cylinder tube ID (for wear, tapering, or scoring). Replace damaged metal components.
Proper Seal Installation: Lubricate all new seals with clean hydraulic fluid. Use seal installation tools (cone tools, sleeves) to guide seals over threads and sharp edges without damage. Ensure seals are seated squarely in their grooves.
Precision Torquing: During reassembly, use a calibrated torque wrench. Follow Komatsu's specified torque sequence and values for gland bolts, tie-rods, or end caps precisely.
| Application Sector | Primary Equipment | Symptoms Addressed by This Kit |
|---|---|---|
| Excavation & Earthmoving | Komatsu Hydraulic Excavators (PC Series) | Cylinder drift (boom/arm drop), visible hydraulic oil leakage from rod gland, slow or weak cylinder operation, increased oil consumption. |
| Construction & Demolition | Implement Cylinders (Boom, Arm, Bucket) | Loss of digging force, inability to hold load, hydraulic system overheating due to internal leakage. |
| Heavy Equipment Maintenance | Planned Rebuilds & Emergency Repairs | Restores factory sealing performance, prevents environmental contamination from leaks, and is a cost-effective alternative to complete cylinder replacement. |
