Wholesale Excavator Parts Hydraulic Seal Kits for Komatsu
Komatsu excavator hydraulic seal kits are designed for high-precision sealing performance, ensuring smooth hydraulic cylinder operation even under continuous, heavy-duty workloads. Manufactured with premium materials and engineered to match Komatsu’s strict technical standards, these kits deliver reliable sealing solutions for boom, arm, and bucket cylinders.
| 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.
Komatsu excavators are well known for their high efficiency and reliability in earthmoving, mining, and construction projects. To maintain this performance, the hydraulic cylinders require sealing components that can withstand extreme pressures, high-frequency movements, and temperature variations. Our Komatsu hydraulic seal kits are specifically designed to meet these requirements, ensuring your machine remains in peak condition.
Manufacturing Process & Quality Control
To guarantee consistent performance, our Komatsu seal kits are produced under a standardized 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.
Key Functions of the Seal Kit
The Komatsu hydraulic seal kit is designed with multiple sealing elements working together to ensure hydraulic efficiency:
- Dust Seals – block contaminants from entering the cylinder
- Rod Seals – prevent hydraulic oil from leaking out of the cylinder
- Piston Seals – maintain pressure between cylinder chambers
- Buffer Seals – absorb pressure spikes and extend rod seal life
- Wear Rings – keep moving parts aligned and prevent metal-to-metal contact
This multi-layer protection system ensures longer equipment uptime and reduces the risk of hydraulic failure.
OEM Compatibility and Fitment
Our Komatsu excavator hydraulic seal kits are available for a wide range of models, covering:
- Boom Cylinders
- Arm Cylinders
- Bucket Cylinders
- Common Komatsu models supported include: PC60, PC120, PC200, PC300, PC400, PC450, and PC800 series.
OEM Reference Numbers available upon request.
| Part Numbers | ||||||
|---|---|---|---|---|---|---|
| 207-63-X9010 | 207-63-X9040 | 207-63-X9050 | 707-98-38510 | 707-98-39610 | 707-98-46280 | 707-98-47670 |
| 707-98-47710 | 707-98-47720 | 707-98-47730 | 707-98-48610 | 707-98-58240 | 707-98-38600 | 707-99-37500 |
| 707-99-45230 | 707-99-46140 | 707-99-46600 | 707-99-47600 | 707-99-50520 | 707-99-57160 | 707-99-57180 |
| 707-99-58080 | 707-99-58090 | 707-99-58240 | 707-99-58260 | 707-99-58360 | 707-99-58370 | 707-99-67010 |
| 707-99-67090 | 707-99-67120 | 707-99-67280 | 707-99-68510 | 707-99-76030 | 707-99-78680 | 721-98-00510 |
| 721-98-00520 | 721-98-00610 | 707-99-65400 | PC200-7 Boom cylinder seal kit | 798-637-73 | ||
| PC200-8 Arm cylinder seal kit | PC200-7 Arm cylinder seal kit | 707-99-46130 | ||||
| PC200-8 Bucker cylinder seal kit | PC200-7 Bucker cylinder seal kit | |||||
| PC210NLC-7K Arm cylinder seal kit | PC200-8 Boom cylinder seal kit | |||||
| PC210NLC-7K Boom cylinder seal kit | PC200-8 track adjuster seal kit | |||||
If you can't find the serial number you need, please contact us.
Quality Assurance
Every seal kit is tested for compression set, leakage resistance, and durability under simulated working conditions. By meeting or exceeding Komatsu OEM standards, we ensure each set provides:
- Long-term reliability
- Minimal downtime
- Reduced replacement frequency
Advantages for Komatsu Users
- Engineered for Japanese Precision – Designed to meet Komatsu’s strict hydraulic tolerance levels.
- Extended Service Life – Durable sealing under constant motion and high loads.
- Effortless Installation – Compatible sizing makes replacement straightforward.
- Cost-Effective Maintenance – Extends cylinder service intervals, reducing operating costs.
Material Overview for Seal Kits
Komatsu 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.
Application Scenarios
Komatsu excavators are widely used in earthworks, mining, quarrying, and infrastructure projects. Our hydraulic seal kits ensure that machines perform reliably in:
- Heavy-duty digging and loading
- Mining and quarry operations
- Road and foundation construction
- Harsh weather conditions including heat, dust, and moisture
Export-Ready Packaging
Each Komatsu hydraulic seal kit is carefully packaged by cylinder type, labeled with model compatibility, and packed in moisture-proof sealed bags. Bulk orders are carton-packed and palletized to ensure safe international transport.
If you are looking for reliable Komatsu excavator hydraulic seal kits with OEM precision and long-lasting performance, contact us today for a quote and technical support.
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.
