Excavator Seal Kit Supplier for Komatsu Digger
Komatsu Excavator Hydraulic Seal Kits are specially designed to provide reliable sealing solutions for various Komatsu hydraulic cylinders, including boom cylinders, arm cylinders, and bucket cylinders. Made from high-quality wear-resistant materials, these seal kits deliver excellent durability against high pressure, heavy loads, and extreme working conditions. Each kit is precisely engineered for OEM compatibility, ensuring accurate fitment and easy installation without leakage or performance loss. By maintaining proper sealing, they help extend the life of hydraulic systems, reduce downtime, and lower overall maintenance costs, making them an essential choice for Komatsu excavator owners and service providers.
| 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 Komatsu Excavator Hydraulic Seal Kit is a critical component in ensuring smooth hydraulic operations for boom, arm, and bucket cylinders. Built with precision engineering, these kits help maintain pressure stability, prevent leakage, and extend the service life of hydraulic cylinders. Whether used in heavy digging, lifting, or grading, Komatsu seal kits deliver consistent performance under demanding working conditions.
Manufacturing Process & Quality Control
Every hydraulic seal kit undergoes a strict production and inspection process to guarantee durability and compatibility:
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, ensuring seamless replacement with OEM specifications.
- Compatible with Komatsu PC60, PC100, PC200, PC300, PC400, PC450, PC600 and other series
- Covers boom cylinder, arm cylinder, and bucket cylinder applications
- OEM reference codes 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 Control & Testing
To guarantee consistent reliability, every batch of seal kits undergoes strict inspection, including:
- Dimensional accuracy checks
- Pressure resistance testing
- Oil resistance and tensile strength evaluation
- Endurance testing for long-term sealing performance
This rigorous process ensures each Komatsu seal kit can withstand real-world working environments.
Application Scenarios
Komatsu Excavator Hydraulic Seal Kits are widely applied in:
- Construction sites – for digging, trenching, and grading
- Mining operations – where durability under high stress is essential
- Forestry and agriculture – handling heavy loads in dusty environments
- Roadwork and demolition – providing reliability in repetitive operations
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.
Maintenance Tips
To maximize the lifespan of your Komatsu seal kits:
- Replace seals during scheduled cylinder servicing
- Keep hydraulic oil clean and free of contaminants
- Inspect rods for scratches or corrosion before installing new seals
- Avoid overloading the excavator to reduce excessive hydraulic pressure
Why Choose Our Komatsu Seal Kits?
- Manufactured with high-grade imported materials
- OEM-level fitment and performance
- Extended service life under heavy-duty conditions
- Global supply with export-ready packaging
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.
