Factory Sale Excavator Boom Arm Bucket Hydraulic Seal Kit for Kobelco
Our Kobelco Excavator Hydraulic Seal Kits are engineered with precision and durability to meet the unique hydraulic system requirements of Kobelco machines. Manufactured using premium materials and advanced sealing technology, these kits ensure superior resistance against oil leakage, pressure loss, and wear, guaranteeing stable operation even under high load and continuous working conditions.
| 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 |
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.
The hydraulic seal kit serves as a vital component in Kobelco excavators, ensuring proper sealing in cylinders such as the boom, arm, and bucket. These seals prevent hydraulic fluid leakage, maintain internal pressure, and protect cylinders from dust, debris, and external contaminants. By keeping the hydraulic system airtight and efficient, seal kits play a direct role in the excavator’s digging force, lifting capacity, and long-term reliability.
Manufacturing Process
To guarantee quality and durability, every Kobelco hydraulic seal kit goes through a structured production process:
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 Kobelco excavator hydraulic seal kits are designed to perfectly fit a wide range of models including:
- Kobelco SK200, SK210, SK250, SK330, SK350, SK480
- Suitable for cylinders: Boom Cylinder, Arm Cylinder, Bucket Cylinder
OEM replacement reference numbers are available upon request to ensure accurate matching with your machine’s hydraulic components.
| 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.
Quality Assurance
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 widely used in:
- Construction sites: Heavy digging, trenching, and foundation work.
- Mining operations: Enduring continuous excavation under high pressure.
- Infrastructure projects: Bridges, highways, and urban development tasks.
- Forestry and agriculture: Handling soil, logs, and material with hydraulic precision.
Material Overview for Seal Kits
Kobelco hydraulic seal kits are crafted from high-performance materials such as PU (polyurethane), NBR (nitrile rubber), and PTFE (Teflon). Each material is carefully selected based on its specific role in resisting friction, high pressure, or extreme temperatures.
Maintenance Tips
- Always replace seals during cylinder overhauls to prevent repeated disassembly.
- Keep hydraulic oil clean and regularly check for contamination.
- Store spare seal kits in a dry, cool environment to avoid premature aging.
- Follow OEM guidelines for installation torque and cylinder reassembly.
Packaging & Delivery
All seal kits are packed in moisture-proof, anti-static packaging, clearly labeled for model identification. Export-standard cartons and pallets are available for bulk orders.
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.
