Oil Floating Seal for Hitachi Excavator Undercarriages
Premium floating oil seals engineered for Hitachi excavators, ensuring reliable sealing performance in final drives, track rollers, and swing gearboxes. Designed to resist abrasion, pressure fluctuation, and contamination under extreme working conditions.
| Material | NBR/ PTFE/ ACM/ VMQ/ FKM/ HNBR/ EPDM/ Silicone and etc |
|---|
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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.
Floating oil seals play a critical role in protecting the key moving components of Hitachi excavators, particularly the final drive, track rollers, and swing machinery where constant pressure, rotation, and abrasive contamination are unavoidable. These seals are engineered specifically for Hitachi’s operating characteristics, delivering a durable and stable barrier against water, mud, stone dust, and high-temperature oil, ensuring long equipment life and reduced downtime.
Engineered for Hitachi Final Drives and High-Load Components
Hitachi excavators are known for wide hydraulic flow ranges, strong digging forces, and fast travel motors. Their final drives operate under high internal pressure and frequent torque shifts, requiring a floating seal that can maintain a consistent sealing gap even under fluctuating load conditions.
These Hitachi-style floating oil seals are built with tightly controlled tolerances, ensuring uniform axial pressure distribution and reliable mechanical sealing when used in high-load environments such as:
- Final drive reduction gearboxes
- Track rollers and idlers
- Swing gearboxes and planetary hubs
The seal maintains a stable film of oil between the two metal faces, preventing overheating and reducing surface wear even when subjected to long working hours.
Extended Wear Resistance
Each metal ring is manufactured from high-purity alloy steel using precision casting and controlled heat treatment. This process gives the sealing faces an exceptionally hard, smooth surface that maintains shape and flatness under heavy mechanical stress. Hitachi machines often encounter mud, gravel, and clay with high mineral content—conditions known to rapidly wear down ordinary seals.
These floating seals resist micro-abrasion, deformation, and thermal expansion, ensuring sealing performance remains consistent across long-term usage.
Advanced Elastomer Compounds
The elastomer rings (toric rings) are produced using a high-performance rubber compound compatible with Hitachi hydraulic oils and gear oils. Depending on the operating environment, the seals may use:
- Nitrile Rubber (NBR) for general construction use
- Viton (FKM) for high-temperature or chemical-exposed conditions
These elastomers provide excellent compression set resistance, allowing the seal to maintain stable preload force and ensure the perfect alignment of the sealing faces throughout pressure cycles.
Outstanding Performance
Floating seals for Hitachi machines are optimized for environments where constant mud immersion or abrasive materials challenge normal sealing components. The design maintains lubrication inside the chamber while blocking contaminants—even when the excavator works in:
- Deep trenching or wet earthmoving
- Riverbed dredging or swamp operations
- Rock quarries and high-dust conditions
- Demolition sites with fine concrete powder
The self-compensating design ensures that as elastomers experience gradual compression, the seal continues to maintain the correct sealing pressure, greatly extending service life.
Precision Finishing
One of the biggest advantages of high-quality Hitachi floating seals is the ultra-flat finish of the metal surfaces. Achieving near-zero unevenness significantly reduces friction and heat buildup. This surface treatment also helps maintain a stable oil film, reducing the likelihood of scoring, vibration, or premature leakage—common issues in low-grade aftermarket seals.
Compatibility Across Hitachi Excavator Models
These floating seals can be supplied for a wide range of Hitachi machines, including but not limited to:
- ZX Series: ZX70, ZX120, ZX200, ZX240, ZX330, ZX350, ZX450
- EX Series: EX120, EX200, EX300, EX350, EX400, EX450
- Zaxis-5 / Zaxis-6 models
- Hitachi forestry and mining excavators
Whether the application is general construction or heavy mining use, each seal is built to match OEM dimensions for seamless installation.
| MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|
| DH50-7 | DH55D | DH60-7 | DH80 | DH130 | DH150 | DH150W-9 | DH215-5 |
| DH200-5 | DH150LC-7 | DH215-7 | DH220-5 | DH220-7 | DH220-9 | DH220-10 | DH225-9 |
| DH258 | DH258LC-7 | DH280 | DH290B | DH300-5 | DH300-7 | DH320 | DH360 |
| DH370 | DH500 | R60-7 | R80 | R130 | R140 | R150-7 | R150-9 |
| R1107-7 | R160-7 | R210 | R220 | R220-7 | R215-7 | R220-5 | R225-7 |
| R225-9T | R225lc-7 | R290 | R350-7 | R110-9 | R215-9 | R275LC-9 | R305 |
| R305-7 | R320 | R335-7 | R360 | R370 | R375 | R375-7H | R455 |
| R460 | R485-7 | EC130 | EC140B | EC210B | EC210C | EC235C | EC240B |
| EC290 | EC290B | EC290C | EC360B | EC460B | EC460C | EC480D | E305 |
| E320 | E325C | E315C | E330C | E315D | E320D | E325D | E330D |
| E360D | E70B | E120B | E200B | E320B | E330B | PC35 | PC40 |
| PC45 | PC50 | PC55 | PC60 | PC60-6 | PC70 | PC75 | PC78 |
| PC80 | PC90 | PC100 | PC110 | PC120 | PC120-7 | PC130 | PC150 |
| PC160 | PC180 | PC200 | PC200-6 | PC200-7 | PC200-8 | PC210-8 | PC220-6 |
| PC220-7 | PC210 | PC220 | PC230 | PC240 | PC240-8 | PC270 | PC300 |
| PC360 | PC360-7 | PC350 | PC400 | PC450 | PC650 | PC750 | PC1250 |
| D31 | D50 | D65 | D85 | D155 | D275 | D375 | D475 |
| EX200-2 | EX220-2 | EX120-5 | EX200-5 | EX220-5 | EX400-5 | ZX200-3 | ZX210-3 |
| ZX240-3 | ZX270-3 | ZX330-3 | ZX360-3 | ZX110 | ZX120 | ZX200-6 | ZX200-3G |
| ZX200-5G | ZX330-3G | ZX350-5G | SK200-3 | SK200-5 | SK135rs | SK70rs | SK60 |
| SK120-5 | SK200-8 | SK250-8 | SK260-8 | SK130-8 | SK200-6e | SK210-6e | SK160 |
| HD80R | HD820-5 | HD1023 | HD1430 | HD700-7 | HD1430-7 | HD1250-7 | HD450-7 |
| SH120A2/A3 | SH130 | SH200A2/A3 | SH210A5 | SH240A3 | SH360A5 | KX155 | KX135 |
| KX161-3 | |||||||
Quality Controls
Every seal undergoes strict inspection procedures, including:
- Flatness and hardness testing
- Surface roughness measurement
- Elastomer endurance testing
- Oil pressure simulation
- Dimensional accuracy verification
These processes ensure the seal performs as required in Hitachi’s high-demand hydraulic system and drivetrain environments.
Installation and Maintenance Recommendations
To maximize sealing life:
- Ensure all components are completely cleaned before installation
- Use compatible lubricants recommended by Hitachi manuals
- Avoid direct hammering during assembly
- Maintain correct preload to prevent uneven wear
- Inspect for oil leaks during early operation hours
- Replace seals in pairs during major repairs
Proper installation contributes significantly to extending the life of the final drive or gearbox.
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.
