Excavator Hydraulic Cylinder Seal Kits for Doosan Arm Boom Bucket Cylinders
Our Doosan hydraulic cylinder seal kits are engineered to provide tight sealing performance under extreme working conditions. Compatible with a wide range of Doosan excavators, these kits feature wear-resistant materials, precise sizing, and long-term durability for boom, arm, and bucket cylinders.
| Material | NBR/ PTFE/ ACM/ VMQ/ FKM/ HNBR/ EPDM/ Silicone and etc |
|---|---|
| Working Temperature | -40–120℃(according to the material) |
| Pressure | Up to 690bar(10000psi) |
| Hardness | 90-95 Shore A |
| Color | Black/Orange/Brown/White/Brown |
| MOQ | 12 Pieces |
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Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
Doosan excavators rely on robust hydraulic systems for optimal digging and lifting performance. Each seal kit in our lineup is tailored to meet or exceed OEM specifications, offering excellent sealing capacity, resistance to pressure fluctuations, and protection against contaminants. Whether you’re replacing seals in a DH220 bucket cylinder or a DX300 boom cylinder, we ensure a precise fit and smooth installation.
Material Composition & Features
Our seal kits are manufactured using a blend of high-performance materials, each selected for its functional role:
- PU (Polyurethane) for wear-resistant dust seals
- PTFE (Teflon) for low-friction buffer rings
- NBR & FKM for oil resistance and thermal stability
- Nylon for back-up rings and anti-extrusion support
These materials are designed to withstand hydraulic oil exposure, dirt ingress, and repeated movement under high pressure.
Compatible Cylinder Types
We offer seal kits for the following hydraulic cylinder positions:
- Boom Cylinder Seal Kit
- Arm Cylinder Seal Kit
- Bucket Cylinder Seal Kit
All kits include piston seals, rod seals, dust wipers, back-up rings, wear rings, and O-rings required for complete rebuilds.
Common Doosan Applications
Seal kits available for the following popular Doosan models:
| 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 | |
| S225LC-V Arm cylinder seal kit | S225LC-V Boom cylinder seal kit | S225LC-V Bucket cylinder seal | |||||
If your model is not listed, feel free to contact us with cylinder measurements or original seal codes.
Installation Instructions
We provide two standard methods to install hydraulic cylinder seals. Choose based on your seal type and available tools.
Installation Method 1: Standard Press-Fit Assembly
- Use the mounting pin to align the seal components inside the cylinder bore.
- Use a ballast tool, locating cone sleeve, and auxiliary pressure plate to gradually compress and install the seal components into the gland without damaging the material.
This method is suitable for standard seals with medium flexibility, and reduces the risk of tearing during installation.
Installation Method 2: PTFE & O-Ring Installation with Calibration
- O-Ring Installation
Lubricate and place each O-ring into its groove using specialized tools to avoid twisting or over-stretching. - PTFE Slip Ring Installation
Gently expand the PTFE ring using a heated mandrel or forming tool, then place it over the piston or gland.
Allow it to cool and reshape into its groove precisely. - Calibration
Use a calibration tool or press-fit tool to compress the installed seals uniformly and ensure correct fit and compression rate before cylinder reassembly.
This method is especially recommended for high-pressure or precision-fit PTFE seals and wear rings.
O ring installation
PTFE Slip Ring Install
Calibration
Quality Control
Every Doosan seal kit undergoes thorough inspection for:
- Dimensional accuracy
- Material hardness and elasticity
- Leak testing under simulated pressure
- Packaging integrity for export
We ensure traceability and quality for both OEM replacement and aftermarket us
Why Choose Our Doosan Seal Kits?
- OEM-level sealing precision
- Broad compatibility with multiple models
- Full kit packaging — no missing components
- Long-lasting performance in harsh work sites
- Export-ready, labeled, and boxed
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
