Wholesale Excavator Hydraulic Cylinder Seal Kit for Kobelco
High-quality Kobelco excavator hydraulic seal kits designed for arm, boom, and bucket cylinders. Superior sealing, wear resistance, and perfect fit for long-lasting hydraulic performance.
| Material | NBR/ PTFE/ ACM/ VMQ/ FKM/ HNBR/ EPDM/ Silicone and etc |
|---|---|
| MOQ | 5 Pieces |
| Pressure | Up to 690bar(10000psi) |
| Working Temperature | -40–120℃(according to the material) |
| Color | Black/Orange/Brown/White/Brown |
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Kinton Seals is trusted by professionals worldwide for providing high-quality seal kits for excavators, dozers, loaders, and other heavy machinery, ensuring reliable performance and long-lasting durability.
The Kobelco Excavator Hydraulic Seal Kit is engineered to deliver exceptional sealing performance for hydraulic cylinders in demanding excavation environments. Designed specifically for arm cylinders, boom cylinders, and bucket cylinders, these seal kits ensure reliable fluid retention, high pressure resistance, and reduced downtime. By maintaining the integrity of your hydraulic system, our seal kits help maximize efficiency and extend component service life.
Manufacturing Process & Quality Control
Every Kobelco hydraulic seal kit undergoes a strict production and inspection process to guarantee durability and compatibility:
Precision Material Weighing
Each raw material block is carefully weighed with high-accuracy equipment before processing. This ensures that every seal ring starts with the exact material volume required for its specific size and application, preventing inconsistencies in density or performance.
Mold Preparation & Material Placement
After weighing, the prepared material is positioned onto the appropriate mold. Our workshop is equipped with a wide variety of molds to match different seal ring diameters and cross-sections. The correct mold selection guarantees precise shaping, while careful placement avoids defects such as uneven thickness.
High-Pressure Compression Molding
The molds are then set under specialized compression machines, where controlled pressure and temperature are applied. This process allows the material to be fully formed into a durable seal with consistent hardness and elasticity. Strict monitoring ensures every batch meets dimensional accuracy and structural integrity.
Rigorous Quality Inspection
Each batch of seals undergoes rigorous testing after molding. Technicians check for dimensional accuracy, surface smoothness, hardness, and sealing resilience. Any defective products are filtered out, ensuring that only seals with stable performance and long service life proceed to packaging.
Seal Kit Composition
Our excavator seal kits are composed of multiple sealing elements that work together to ensure performance:
- Piston Seals – Maintain fluid separation between high- and low-pressure zones.
- Rod Seals – Prevent fluid leakage during piston rod movement.
- Dust Seals / Wipers – Protect cylinders from contaminants such as dust, mud, and water.
- O-Rings & Backup Rings – Ensure precise fitting and eliminate micro-leaks under pressure.
- Wear Rings – Reduce metal-to-metal contact and improve cylinder alignment.
This comprehensive structure ensures that Kobelco machines maintain peak hydraulic efficiency across diverse working conditions
OEM Compatibility and Fitment
Our hydraulic seal kits are designed for a wide range of Kobelco excavator models, including:
- SK200, SK210, SK250
- SK300, SK330, SK350
- SK450, SK480, SK500
- Other popular Kobelco models upon request
OEM Reference Numbers are available for cross-checking. Please provide your existing part number, and we can confirm compatibility.
| Part Numbers | |||||||
|---|---|---|---|---|---|---|---|
| SK330 center joint seal kits | LQ01V00007R300 | YB01V00010R300 | YN01V00068R300 | ||||
| YN01V00103R300 | YN01V00151R700 | YN01V00153R300 | YN01V00175R300 | ||||
| 2438U1946R300 | LS01V00003R300 | 2438U1948R500 | 2438U1949R500 | ||||
| YN01V00103R900 | YN01V00153R700 | YY01V00003R300 | YN01V00175R700 | ||||
| ZD11P01600 | ZD11P02000 | ZD12G08000 | ZD12P01500 | 44-KOB-79 | 2418U130D35 | ||
If you can't find the serial number you need, please contact us.
Advantages of Kobelco Hydraulic Seal Kits
Each kit undergoes rigorous quality control in accordance with international standards. By replicating OEM specifications while offering enhanced durability, our seal kits minimize downtime and extend the operational life of your Kobelco excavator
Application Scenarios
Kobelco excavator hydraulic seal kits are suitable for a wide range of applications:
- Construction & Earthmoving – Ensures continuous operation with minimal leakage.
- Mining & Quarrying – Withstands heavy loads and abrasive working conditions.
- Road & Infrastructure Projects – Provides stable hydraulic function in long-hour operations.
- Agriculture & Forestry – Reliable sealing in equipment used for land clearing and material handling.
Material Overview for Seal Kits
Kobelco excavators are known for their precise hydraulic control and efficiency, which requires equally precise sealing solutions. Our seal kits are manufactured using premium materials such as:
Nitrile Rubber Buna(NBR, BUNA-N)
Temperature Range:-30 to 125 ℃
Hardness:60-90 Shore A
Color: Black
Use: Oil & Water Resistance Situation Advantage: Excellent oil resistance, performance and stability, widely used, cheaper
Fluororubber(FKM,FPM)
Temperature Range:-20 to 250℃
Hardness:70-90 Shore A
Color: Black/Brown/Green
Use: Oil & Chemical Resistance Situation
Advantage: Wear resistance, acid and alkali resistance, high temperature resistance situation
Silicone (VMQ )
Temperature Range: -60 to 225 ℃
Hardness: 50-70 Shore A
Color: Red/Black/Blue/White/Transparent, etc
Use: Heat& Food Situation(FDA, RoHS Approved)
Advantage: Good heat resistance, cold resistance, lubrication oil resistance, water resistance safety & reliable to human body
Ethylene Propylene Rubber(EPDM, EPM)
Temperature Range:-50 to 150 ℃
Hardness: 60-90 Shore A
Color: Black
Use: Ozone, water vapor situation
Advantage: Excellent oxidation resistance ozone resistance and erosion resistance
Perfluoroelastomer(FFKM, FFPM)
Temperature Range: -42 to 327 ℃
Hardness:60-95 Shore A
Color: Black / White
Advantage: Long-term, proven performance, can mean less frequent seal changes, repairs and inspections, increasing process and equipment uptime in productivity and yield.
Neoprene Rubber(CR )
Temperature Range:-30 to 125 ℃
Hardness:60-90 Shore A
Color: Black
Use: Oil & Water Resistance Situation Advantage: Excellent oil resistance, performance and stability, widely used, cheaper
The combination of these materials ensures tight sealing under fluctuating pressure, improved resistance to hydraulic fluid degradation, and reliable performance across a wide range of operating environments.
Maintenance Tips
To maximize the life of your Kobelco hydraulic seal kits:
- Regularly inspect seals for wear, hardening, or leakage.
- Replace seals during cylinder maintenance to prevent unexpected downtime.
- Keep hydraulic oil clean to minimize contamination damage.
- Store spare seal kits in a dry, temperature-controlled environment.
Packaging & Delivery
Each seal kit is packaged with anti-moisture and anti-dust protection, ensuring seals remain intact during long-distance shipping. Bulk orders are supplied in clearly labeled cartons for easy identification.
Whether you operate a SK200 for construction or a SK500 in mining, our Kobelco hydraulic seal kits provide the sealing strength your machine needs to keep performing at its best.
At Kinton Seals, we understand that reliable delivery is just as important as product quality. Our goal is to ensure that every order of Seal Kits for excavators, bulldozers, wheel loaders, and other heavy machinery reaches our customers safely, on time, and in perfect condition.
Packaging & Protection
- Standard Export Packaging – Each seal kit is carefully packed in moisture-proof and dust-proof bags, ensuring seals remain clean and undamaged during storage and transportation.
- Layered Protection – Kits are placed in sturdy cartons, and for bulk shipments, cartons are further reinforced with pallets and stretch film to minimize impact during handling and transit.
- Customization Options – We provide OEM/ODM packaging services, including branded boxes, barcodes, and special instructions, helping partners strengthen their brand presence in local markets.
- Extra Protection – For bulk shipments, cartons and pallets are reinforced to reduce the risk of damage in transit.
Order Processing & Lead Time
- Standard Seal Kits – For large quantity orders, lead time is usually 7–10 working days, as each kit requires precise matching of every seal, followed by labeling and packaging.
- Custom Seal Kits – For tailored requirements or non-standard models, production and assembly typically take 15–30 days, especially if new tooling or mold development is required.
- Sample Orders – Small batch or sample kits can often be prepared faster, subject to stock availability.
Delivery Options
- Air Freight for urgent orders
- Sea Freight for bulk shipments
- Courier Express (DHL, FedEx, UPS) for small packages and samples
Quick Quote Request
Kinton Seals is trusted by professionals worldwide for providing high-quality seal kits for excavators, dozers, loaders, and other heavy machinery, ensuring reliable performance and long-lasting durability.
