Wholesale Seal Kits fit Hitachi Excavators Arm Boom Bucket Cylinders
High-performance seal kits specifically designed for Hitachi hydraulic cylinders. Each kit offers excellent wear resistance, leak prevention, and temperature stability. Suitable for a wide range of models including EX, ZX, and UH series—ideal for arm, boom, and bucket cylinders.
| Material | NBR/ PTFE/ ACM/ VMQ/ FKM/ HNBR/ EPDM/ Silicone and etc |
|---|---|
| Hardness | 90-95 Shore A |
| Working Temperature | -40–120℃(according to the material) |
| Pressure | Up to 690bar(10000psi) |
| 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.
These Hitachi hydraulic seal kits are tailored for efficient sealing of arm, boom, and bucket cylinders across a wide range of Hitachi excavators. Designed to match OEM specifications, our kits ensure reliable hydraulic pressure retention, reduce leakage, and prolong component life under demanding jobsite conditions.
Materials & Sealing Technology
Each kit is composed of high-grade sealing components, including:
- PU seals: Superior elasticity and wear resistance
- PTFE backup rings: Prevent extrusion under high pressure
- NBR or FKM O-rings: Provide chemical resistance
- Dust wipers: Block contaminants from entering the cylinder system
The combination of these materials ensures optimal function in both high and low temperature environments.
Model Compatibility & OEM Reference
Our Hitachi seal kits are available for a wide range of cylinders and part numbers:
| 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 | ||||||
Please contact us with your part number or cylinder specs to confirm compatibility.
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
PTFE Slip Ring Install
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.
Quality Control
All kits undergo pressure testing simulation, dimensional checks, and material verification before shipment. We ensure every seal set meets or exceeds OEM performance standards.
Maintenance Tips
- Replace seals regularly based on operating hours and oil condition
- Keep cylinders clean and well-lubricated
- Use correct hydraulic fluid to avoid premature seal wear
- Store kits in a cool, dry place away from direct sunlight
Contact for Quote & Custom Orders
Need help identifying the right kit for your Hitachi model? Send us your cylinder specs or part number. Our technical team will recommend the exact seal kit.
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.
