707-99-57160 Arm Cylinder Seal Kit for Komatsu Excavators PC200-7 | DJF
707-99-57160 Excavator Seal Kit for PC200-7 Product Overview
The 707-99-57160 Seal Kit is a precision-engineered repair solution for the Komatsu PC200-7 excavators arm (boom) cylinders. Standard size designed to stop leaks and restore hydraulic efficiency, this repair kit meets Komatsu’s strict KES (Komatsu Engineering Standards), support OEM and ODM.
707-99-57160 Seal Kit Technical Specifications
| Komatsu Models Fits | PC200-7, PC200LC-7 |
| Application | Excavator Arm Cylinder Repair Kits |
| Pressure Rating | 0–35 MPa (5,076 PSI) – depends on the material, Support custom |
| Temperature Range | -30°C to +110°C (-22°F to +230°F) – depends on the material, Support custom |
| Seal Materials | Polyurethane (PU) Piston Seals + NBR Buffer Rings + FKM Wiper etc |
| Critical Components | PTFE Backup Rings, Chrome-Plated Piston Band, Wear-Resistant Guide Rings |
| Certifications | ISO Standard |
Seal Kit Main Components & Functions
| 1. Dual-Lip Piston Seal (PU) | Asymmetric design handles 15° misalignment – zero leakage at 35 MPa. |
| 2. Rod Scraper (FKM) | 3-angle wiper removes silica dust/mud – compliant with ISO 4406:2021 18/16. |
| 3. Pressure-Activated Buffer Ring (NBR) | Absorves shock pulses during bucket digging (tested for 500k cycles). |
| 4. Anti-Extrusion Rings (PTFE) | Prevents seal creep under side-load forces >2,000 N. |
| 5. Piston Guide Band (Bronze-Filled PTFE) | Reduces metal-to-metal contact – friction coefficient <0.08. |
| 6. Port Seals (HNBR O-Rings) | SAE J120 Type R2H-rated for hydraulic block interfaces. |
Key Features
✅ Exact OEM Replacement: Direct substitute for Komatsu part numbers
✅ Shock Load Resilience: Withstands 50 G-force impact during rock excavation
✅ Abrasion Resistance: PU seals endure 15 mg/L contaminant levels
✅ Zero-Friction Design: Optimized seal geometry reduces heat buildup by 40% vs. generic kits
Frequently Asked Questions (FAQ)
Q: Do you have any other excavator model repair seal kits ?
A: Yes. As the professional excavator seal kits manufacturer, we produce all the excavators repair seal kits, standard sizes and also support customization. Please tell us the part number seal kit you want.
Q: I can’t find the model I want. Are all your seal repair kits here?
A: No. We have more than tens of thousands seal kits. Here only a small part of them is shown. We have stock of all the seal kits for construction machinery. Please contact us!
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