Aftermarket Hydraulic Seal Kit Parts for Hitachi Excavator
Durable Hitachi Excavator Hydraulic Seal Kit tailored for boom, arm, and bucket cylinders. Delivers excellent sealing performance, precise fit, and extended service life, helping your excavator operate reliably in the toughest 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 |
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.
Hydraulic seals are small but critical components that keep Hitachi excavators performing at their best. The Hitachi Excavator Hydraulic Seal Kit is designed to maintain system pressure, prevent hydraulic fluid leaks, and protect internal cylinder components from wear and contamination.
With a complete set of seals for boom, arm, and bucket cylinders, this kit is the ideal choice for regular maintenance or full cylinder rebuilds. It helps operators minimize downtime, reduce operating costs, and extend the overall lifespan of their excavators.
Manufacturing Process
Every seal kit goes through a strict production and inspection workflow before packaging. This ensures the performance and reliability of each kit delivered.
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
The kit is designed as a direct replacement for a wide range of Hitachi excavator models, including:
- EX Series: EX60, EX120, EX200, EX300, EX350, EX400
- ZX Series: ZX70, ZX120, ZX200, ZX240, ZX330, ZX350, ZX470
- Compatible with boom, arm, and bucket cylinder rebuilds
- OEM reference codes available upon request
This guarantees proper fit, easy installation, and OEM-level reliability.
| part numbers | ||||||||
|---|---|---|---|---|---|---|---|---|
| 4255532 | 4352341 | 4352354 | 4352357 | 4369901 | 4465644 | 4485612 | 4639939 | 4640107 |
| 4640118 | 4649745 | 4649751 | 4649752 | 4652906 | 4448400 | 4448398 | 4448399 | 4647596 |
| FYA00001398 | YA00003778 | YA00001392 | YA00001400 | YA00001396 | YA00000745 | ZAX330 track adjuster seal kit | ||
| EX60-2 Arm cylinder seal kit | EX60-2 Boom cylinder seal kit | EX60-2 Bucket cylinder seal kit | ||||||
| EX215 Arm cylinder seal kit | EX215 Boom cylinder seal kit | EX215 Bucket cylinder seal kit | ||||||
| EX215 Center joint seal kit | EX215 Swing motor seal kit | FH200-2 Arm cylinder seal kit | ||||||
| FH200-2 Boom cylinder seal kit | FH220 Gear pump seal kit | FH220 Main pump seal kit | ||||||
| FH220 Center joint seal kit | FH220 Travel motor seal kit | FH270-3 Center joint seal kit | ||||||
| FH330 Main pump cylinder seal kit | FH330 Center joint seal kit | FH330 Travel motor seal kit | ||||||
| ZX30U Center joint seal kit | ZX130 Arm cylinder seal kit | ZX210 Arm cylinder seal kit | ||||||
| ZX210 Boom cylinder seal kit | ZX210 Bucket cylinder seal kit | ZX350LCH-5G Bucket cylinder seal kit | ||||||
| EX350-5 boom seal kit | ZAX200 bucket seal kit | ZAX330 boom seal kit | ||||||
If you can't find the serial number you need, please contact us.
Quality Assurance
Our Hitachi hydraulic seal kits are manufactured and tested to meet or exceed OEM standards. Key benefits include:
- Leak-free operation under extreme hydraulic pressure
- Long-lasting resistance to abrasion and fluid exposure
- Precise fit that reduces installation errors
Dependable performance across construction, mining, and heavy-duty applications
Maintenance Recommendations
To maximize cylinder and seal kit performance:
- Replace seals during scheduled maintenance or after detecting early signs of leakage
- Keep hydraulic rods clean and free from dirt or dust
- Use recommended hydraulic oils and maintain proper pressure levels
- Store seals in a dry, cool place before installation to prevent premature aging
Material Overview for Seal Kits
Our Hitachi hydraulic seal kits are produced using a wide range of advanced elastomers and synthetic rubbers such as CR, NBR, FKM, VMQ, EPDM, and FFKM. Each material provides unique resistance to oil, temperature, abrasion, or chemicals. By combining these materials strategically, the seal kit ensures both flexibility and durability, making it suitable for diverse and demanding job site 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
Application Scenarios
- Earthmoving and trenching projects with constant hydraulic use
- Heavy-duty excavation and demolition sites
- Mining, quarrying, and aggregate handling operations
- Maintenance workshops conducting cylinder rebuilds for Hitachi excavators
Contact & Ordering
For kit selection and ordering, reach out to our sales team with your Hitachi model and cylinder type. We provide fast delivery, OEM cross-reference support, and export-ready packaging to ensure you get the right kit, on time.
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.
