Hydraulic Spare Parts Oil Floating Seal for Caterpillar Crawler Excavator Undercarriages
Durable floating oil seals engineered specifically for Caterpillar machinery, providing reliable sealing performance in final drives, track rollers, and idlers. Built for extreme load, high pressure, and heavy contamination, ensuring stable operation and extended component life.
| 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.
Optimized for the High-Torque Drivetrains of Caterpillar Machines
Caterpillar bulldozers, excavators, and loaders generate substantial internal pressure within their final drive assemblies. This pressure fluctuates with every directional change, load surge, or sudden torque application. The floating oil seal used in CAT equipment is engineered to maintain an accurate sealing gap even as the machine endures:
- Strong vibration
- Abrasive terrain
- High shock loads
- Continuous forward/reverse cycles
Its self-adjusting design ensures that the sealing faces stay aligned, enabling maximum reliability in the most demanding operating environments.
High-Hardness Wear Surfaces
The metallic sealing rings are produced from high-quality alloy steel and processed through precision casting and multi-stage heat treatment. This results in a dense material structure with excellent resistance to abrasion and thermal expansion.
The sealing faces undergo fine grinding and lapping to create a mirror-like finish, minimizing friction and heat buildup during operation. Caterpillar machines often work in challenging terrain—rock quarries, mining sites, clay-rich soil or river basins—where inferior seals fail prematurely. These upgraded sealing rings ensure long service life and stable oil containment.
High-Resilience Elastomer Rings
The elastomer toric rings supply the axial pressure required to bring the metal faces into perfect contact. Caterpillar-style floating seals typically use specially formulated compounds such as:
- NBR (Nitrile) for standard earthmoving conditions
- FKM (Viton) for high-temperature or chemically demanding environments
These rubber compounds resist compression set and oil degradation, preserving a consistent sealing force even through long hours of operation.
Superior Contamination Resistance
Caterpillar equipment frequently operates in abrasive or wet conditions—mud pits, quarries, deserts, and heavy construction sites. The floating oil seal must prevent the intrusion of fine particles, water, and chemical contaminants that can quickly damage gears and bearings.
This seal’s design keeps lubrication inside while creating a tight mechanical barrier against external contaminants. Even when exposed to high volumes of abrasive particles or when the machine is submerged during trenching, the seal maintains its integrity and performance.
Precision Fit for a Wide Range of Caterpillar Models
The Caterpillar floating oil seal can be supplied for numerous CAT machines, including but not limited to:
- Excavators: 320, 330, 336, 349, 374, 390
Track loaders and pipelayers
Mining equipment and heavy-duty industrial machines
Each seal is manufactured to match OEM specifications for diameter, preload, and material hardness, ensuring full compatibility during replacement.
| 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 | |||||||
Precision Manufacturing
Quality control steps include:
- Hardness and flatness testing of metal rings
- Surface roughness inspection to ensure proper oil film maintenance
- Dimensional measurement to guarantee accurate fit
- Elastomer compression and aging tests
- Pressure simulation testing for final drives
This strict quality management ensures that every seal meets Caterpillar’s demanding mechanical requirements.
Benefits
Using a premium seal significantly enhances the durability of major undercarriage and drivetrain components. Key benefits include:
- Longer final drive lifespan
- Reduced oil leakage and overheating
- Lower risk of contamination-related failures
- Smoother operation of rollers, idlers, and travel motors
- Reduced maintenance downtime and operating cost
Caterpillar machines often run in long shifts, and a reliable floating seal is essential for maintaining consistent efficiency and performance.
Installation and Maintenance Guidelines
To achieve optimal sealing results:
- Thoroughly clean the sealing chamber and mounting surfaces
- Coat the metal faces with a thin layer of clean oil before assembly
- Ensure elastomer rings are not overstretched
- Avoid using hammers or sharp tools that may deform the seal
- Replace seals in pairs to maintain balance and prevent uneven wear
- Recheck oil levels after initial test operation
Proper installation greatly enhances the lifespan and sealing reliability of the CAT floating oil seal.
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.
