Technical Constants & Performance Data
| Parameter | Value / Specification |
|---|---|
| Pressure Rating | Up to 5,000 PSI (345 bar) |
| Temperature Range | -40°F to 225°F (-40°C to 107°C) |
| Fluid Compatibility | Petroleum-based oils, synthetic hydrocarbons, Komatsu-approved fluids |
| Material Standards | Polyurethane (AU/CU), Nitrile Rubber (NBR), PTFE composites |
| Seal Hardness | 90-94 Shore A (Dynamic), 70 Shore A (Static) |
| Manufacturing Tolerance | ISO 3601 / AS568A standards |
| Quality Standard | Manufactured to meet or exceed original Komatsu technical specifications. |
Exact Model Compatibility
| Komatsu OEM Part Number | COGENG Replacement | Application Note |
|---|---|---|
| 707-98-26540 | 707-98-26540 | Direct OEM Replacement |
| Note: | This kit is designed as a direct, part-for-part replacement for Komatsu OEM part number 707-98-26540. The specific machine and cylinder application must be verified through Komatsu's official parts documentation. Compatibility is guaranteed when this OEM number is specified for the repair. |
Component Specifications Table
| Component Name | Material Specification | Standard | Function |
|---|---|---|---|
| Piston Seal | Polyurethane (OEM Grade) | ISO 7425-1 | Main dynamic pressure seal |
| Rod Seal | Cast Polyurethane Composite | ISO 6547 | Primary rod sealing |
| Wiper/Scraper | Polyurethane (Heavy-Duty) | ISO 6195 | Contaminant exclusion |
| Wear Ring/Guide Band | Glass-Filled PTFE | - | Piston/Rod guidance |
| O-Ring Set | Nitrile Rubber (NBR) | AS568A / ISO 3601 | Static sealing |
| Backup Rings | Nylon 6.6 | - | Anti-extrusion protection |
| Gland Seals | Various per OEM design | - | Complete gland sealing |
Installation decomposition diagram
Frequently Asked Questions
A. When will get the items after I place order?
Q. Once your payment is confirmed,we will arrange the goods within 1~4 days; if not in stock, we will inform you before placing the order?
A. If I only know the excavator model, but can not offer parts No.,what should I do ?
Q. If possible, you can send us pictures of old products, nameplate or the size for reference.
A. How can you guarantee the quality??
Q. We will 100% test the goods before delivery. We also support video inspection.
A. How long will it take to delivery to my address??
Q. The normal delivery time is 3-7 days, depending on which country you are in.?
A : Which delivery method will you choose?
Q : By sea, air or express(DHL,Fedex,TNT, UPS, EMS etc.)，Sometimes we will arrange as the customer's demand.
A: What's package? Can you give me the package according my requirement??
Q. We usually packed by standard exported box or carton. And yes we can pack as per your requirement.
A: Can the price be cheaper?
Q: Of course, you will be offered a good discount for a big amount.
A: Why should I choose to buy from you?
Q:Our advantages: 100% quality assurance, develop and manufature follow original ones;Quick response within 24 hours; Small order allowed;Reasonable stock and timely delivery;Neutral packing, customized packing are allowed. Positive customer feedback from abroad market;Excellent after-sales service.
A : Which payment terms can you accept?
Q : Paypal. Western Union, Bank Transfer, T/T...
Contact COGENG
📞 Phone: +86-185-2913-1515 🌐 Instagram
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🌐 Website: cogeng.net
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