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 hydraulic oils, synthetic fluids, Komatsu Super Hydraulic Fluid (KSHV) |
| Primary Seal Materials | Polyurethane (AU/CU), Nitrile Rubber (NBR), PTFE composites |
| Seal Hardness (Dynamic) | 88-94 Shore A (Polyurethane) |
| Seal Hardness (Static) | 70 Shore A (NBR O-Rings) |
| Manufacturing Standards | ISO 3601, AS568A, ISO 7425 |
| Quality Assurance | Manufactured to meet or exceed original Komatsu technical specifications |
Exact Model Compatibility
| Komatsu Part Number | COGENG Replacement | Component Category |
|---|---|---|
| 707-98-34640 | 707-98-34640 | Hydraulic Cylinder Group |
| Compatibility Note: | The "707" prefix in the part number identifies this kit as belonging to the hydraulic cylinder group, a critical component category for excavators, dozers, and loaders The exact equipment application must be verified through Komatsu's official parts documentation or Electronic Parts Catalog (EPC) before purchase. |
Component Specifications Table
| Component Name | Material Specification | Standard | Primary Function |
|---|---|---|---|
| Piston Seal | Premium Polyurethane | ISO 7425-1 | Main dynamic pressure seal; maintains pressure between cylinder chambers |
| Rod Seal | Cast Polyurethane Composite | ISO 6547 | Primary rod sealing; prevents hydraulic oil from leaking out of the cylinder |
| Wiper/Scraper | Heavy-Duty Polyurethane | ISO 6195 | Contaminant exclusion; blocks dirt and debris from entering the cylinder |
| Wear Ring/Guide Band | Reinforced PTFE | - | Piston/rod guidance; keeps moving parts aligned and prevents metal-to-metal contact |
| Buffer Ring | Polyurethane (CU) | - | Absorbs pressure spikes and extends rod seal life |
| O-Ring Set | Nitrile Rubber (NBR) | AS568A/ISO 3601 | Static sealing for gland, end cap, ports, and fittings |
| Backup Rings | Engineering-Grade Nylon | - | Anti-extrusion protection for high-pressure applications |
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?
Contact COGENG
📞 Phone: +86-185-2913-1515 🌐 Instagram
📧 Email: hugo@cogeng.net 🌐 Facebook：Excavator Parts Selection and Replacement Community
💬 WhatsApp +86-185-2913-1515 Facebook: Excavator Wiring Harness
💬 WeChat: +86-185-7865-1106 Facebook: Excavator Wire Harness
🌐 Website: cogeng.net
#ExcavatorWiringHarness #ExcavatorThrottleMotor #ExcavatorSolenoidValve
Q : Paypal. Western Union, Bank Transfer, T/T...
