Factory Excavator Parts Hydraulic Seal Kits for Doosan Daewoo
Premium Doosan Excavator Hydraulic Seal Kit designed for leak-free performance, precise cylinder fit, and long-lasting durability, ensuring smooth and reliable operation under heavy-duty construction conditions.
| Material | NBR/ PTFE/ ACM/ VMQ/ FKM/ HNBR/ EPDM/ Silicone and etc |
|---|---|
| Working Temperature | -40–120℃(according to the material) |
| Pressure | Up to 690bar(10000psi) |
| Color | Black/Orange/Brown/White/Brown |
| MOQ | 5 Pieces |
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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 Doosan Excavator Hydraulic Seal Kit is a complete solution for maintaining hydraulic cylinder integrity and performance. It prevents fluid leakage, protects pistons and rods from wear, and ensures smooth operation for boom, arm, and bucket movements. This kit allows excavator operators to maintain consistent lifting and digging efficiency while reducing downtime and maintenance costs.
Hydraulic seals are essential for controlling fluid pressure and flow, directly impacting the excavator’s operational reliability. The Doosan seal kit includes all necessary components for a full cylinder rebuild, providing dependable performance in tough construction environments.
Manufacturing Strength
Seals in this kit are made from high-grade elastomers and advanced polyurethane compounds, specifically selected for their:
- Resistance to hydraulic fluid and high-pressure conditions
- Durability under extreme temperatures and abrasive environments
- Long-term wear resistance and dimensional stability
Each seal is precision-molded to match Doosan OEM specifications, ensuring perfect fit and smooth cylinder movement.
Manufacturing Process
Before the seals are carefully packaged into complete kits, every stage of production is carried out under strict quality standards. From the selection of raw materials to the final inspection, each step is designed to ensure durability, precision fit, and consistent performance. This controlled process not only guarantees OEM-level reliability but also helps extend the service life of Doosan excavator hydraulic cylinders.
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.
OEM Compatibility & Fitment
This hydraulic seal kit is compatible with a wide range of Doosan excavator models, including:
- DX55, DX60, DX140, DX225, DX300 series
- Boom, arm, and bucket cylinder rebuilds
- OEM replacement numbers available upon request
The kit ensures a direct fit and reliable performance, offering the same quality as original Doosan components and reducing operational downtime.
| PART NUMBERS | |||||||
|---|---|---|---|---|---|---|---|
| 274-00004BKT | 440-00042BKT | 440-00044AKT | 2274-1014AKT | 2440-9144KT | 2440-9146KT | 2440-9236KT | 2440-9240KT |
| 2440-9241KT | 2440-9413KT | 2440-9441KT | 401107-00171A | 401107-00298A | 401107-01220A | DX225 | K9001007 |
| K9001008 | K9001009 | K9001878 | K9001892 | K9001901 | K9002066 | K9002067 | K9002068 |
| K9002289 | K9002290 | K9002306 | K9002307 | K9002308 | K9003934 | K9003935 | K9004402 |
| K9004899 | K9005434 | 440-00139 | 2480-1013KT | 2440-9234KT | 2440-9339KT | 2440-9090KT | Â |
| S225LC-V Arm cylinder seal kit | S225LC-V Boom cylinder seal kit | S225LC-V Bucket cylinder seal kit | Â | ||||
If you can't find the serial number you need, please contact us.
Quality Assurance
Every kit undergoes rigorous testing to guarantee:
- Leak-free performance under high-pressure hydraulic conditions
- Long-lasting durability and wear resistance
- Accurate fit to reduce installation errors and cylinder damage
Our strict quality control ensures each kit meets or exceeds Doosan OEM performance standards.
Maintenance Recommendations
To maximize seal kit performance and cylinder lifespan:
- Inspect hydraulic seals regularly for leaks or wear
- Replace seals promptly during cylinder maintenance or rebuilds
- Use recommended hydraulic fluids and maintain correct system pressure
- Keep cylinders clean to prevent contamination and premature wear
Material Overview for Seal Kits
Each seal kit is composed of selected elastomers and polymers, chosen for their performance under different working environments:
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
Application Scenarios
- Heavy construction and earthmoving operations requiring reliable hydraulic performance
- Excavator maintenance workshops performing boom, arm, and bucket cylinder rebuilds
- Harsh environments including excavation, trenching, and material handling
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.
