Excavator Parts Hydraulic Ram Seal Kit Cross Reference for Hyundai Equipment
Hyundai excavator hydraulic seal kits are designed to provide superior sealing performance and long-lasting durability. Manufactured with premium materials and precise engineering, these kits ensure smooth hydraulic operation, leak prevention, and reliable performance under demanding 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 |
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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 Hyundai Excavator Hydraulic Seal Kit is a complete set of precision-engineered seals developed to protect hydraulic cylinders against oil leakage, dust intrusion, and premature wear. Designed to match Hyundai’s advanced hydraulic systems, these kits ensure smooth cylinder operation and stable performance across heavy-duty applications, from construction sites to mining fields.
Each kit is tailored for boom cylinders, arm cylinders, and bucket cylinders, providing long-lasting sealing solutions that keep excavators running efficiently under varying conditions.
Material and Technology
To guarantee quality and consistency, every seal kit undergoes a rigorous production and inspection process before delivery.
Highlights of the 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
Each Hyundai hydraulic seal kit typically includes:
- Rod Seals: Prevent hydraulic oil leakage along the piston rod.
- Piston Seals: Provide internal sealing between cylinder chambers.
- Dust/Wiper Seals: Keep out dust, sand, and water.
- Wear Rings & Guide Rings: Reduce metal-to-metal contact and extend cylinder life.
- O-Rings & Backup Rings: Reinforce sealing and provide secondary protection.
All components are precisely matched to Hyundai cylinder dimensions, ensuring easy installation and reliable fitment.
Compatibility and OEM Fitment
Our seal kits are engineered to fit a wide range of Hyundai excavators, including models such as:
- Hyundai R140, R210, R220, R290, R320, R360, R450
- Hyundai HX series and older Daewoo-based models
OEM reference numbers are available upon request. Customers are encouraged to provide their part number or cylinder code for accurate matching.
| Part Numbers | |||||||
|---|---|---|---|---|---|---|---|
| R300LC-9 Arm cylinder seal kit | R210-7 Arm cylinder seal kit | ||||||
| 31NB-40550 | 31Y1-04032 | 31Y1-06561 | 31Y1-06731 | 31Y1-06841 | 31Y1-07751 | 31Y1-09410 | 31Y1-14050 |
| 31Y1-15395 | 31Y1-15700 | 31Y1-15880 | 31Y1-20430 | 31Y1-24670 | 31Y1-24790 | 31Y1-26410 | 31Y1-26580 |
| 31Y1-28960 | 31Y1-29100 | 31Y1-30111 | 31Y1-32910 | 31Y1-33571 | 31Y1-15230 | 31Y1-28790 | |
If you can't find the serial number you need, please contact us.
Manufacturing and Quality Control
Every Hyundai Excavator Seal Kit is developed to meet strict OEM standards. Key performance guarantees include:
- Leak-free operation under extreme hydraulic pressure
- Extended service life in heavy-duty construction environments
- Reduced downtime and lower repair costs
- Dependable sealing performance across varied job conditions
Application Scenarios
Hyundai excavator hydraulic seal kits are widely used in:
- Earthmoving and construction – stable sealing for long excavation hours.
- Mining and quarrying – high wear resistance against dust and stone particles.
- Port handling and heavy lifting – consistent oil pressure for smooth lifting operations.
- Road and urban projects – reliable sealing even in stop-and-go conditions.
Material Overview for Seal Kits
Our Hyundai hydraulic seal kits are manufactured using a carefully balanced selection of premium elastomers and rubbers. Each material is chosen for its specific strength—resistance to oil, temperature, abrasion, or chemicals—making the kit versatile and durable under different working environments. This combination ensures leak-free operation and stable performance even under high-pressure conditions.
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
Why Choose Our Seal Kits?
- Direct OEM replacement for Hyundai cylinders
- Extended service life with reduced maintenance downtime
- Cost-effective without compromising quality
- Global supply support, export-ready packaging for safe delivery
Maintenance Tips
To maximize seal kit performance:
- Always replace seals during cylinder overhaul instead of reusing old parts.
- Keep cylinder rods clean and free of scratches to avoid seal damage.
- Use recommended hydraulic oil to prevent swelling and premature wear.
- Store spare kits in a cool, dry place away from direct sunlight.
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.
