Arm Boom Bucket Cylinder Seal Kits fit CASE Excavator
Durable, high-performance seal kits for CASE excavator hydraulic cylinders. Designed to ensure reliable sealing and long service life in arm, boom, and bucket cylinder applications. Includes backup rings, dust seals, piston seals, O-rings, and more.
| Material | NBR/ PTFE/ ACM/ VMQ/ FKM/ HNBR/ EPDM/ Silicone and etc |
|---|---|
| Working Temperature | -40–120℃(according to the material) |
| Pressure | Up to 690bar(10000psi) |
| Hardness | 90-95 Shore A |
| 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.
Our hydraulic cylinder seal kits for CASE excavators are engineered to restore full sealing performance in your boom, arm, and bucket cylinders. Built to meet OEM standards, each kit includes all necessary components for a complete overhaul — ensuring smooth hydraulic function, reduced downtime, and extended cylinder life even in the harshest working conditions.
These seals are compatible with a wide range of CASE models, supporting aftermarket replacements and repairs for machines used in construction, mining, and earthmoving operations.
Common Components in the Kit:
- Dust Seal (Wiper Seal): Prevents contamination from entering the cylinder
- Rod Seal: Maintains pressure inside the cylinder
- Piston Seal: Ensures sealing between piston and cylinder bore
- Wear Ring / Guide Ring: Reduces side loads and friction
- Backup Ring & O-rings: Enhances sealing and prevents extrusion
Compatible CASE Models
Our seal kits are compatible with a wide range of CASE excavator models. Please refer to the part numbers or contact us for exact fitment support.
Available Cylinder Kits
We supply seal kits for the following hydraulic cylinder positions:
- Boom Cylinder Seal Kit
- Arm Cylinder Seal Kit
- Bucket Cylinder Seal Kit
Each set contains all necessary components for a full rebuild, including wear rings, seals, and backup supports.
Sample Part Numbers
Below are some typical CASE cylinder seal part numbers included in our inventory:
| PART NUMBER | |||||||
|---|---|---|---|---|---|---|---|
| 72283999 | 72284002 | 72284189 | LZ00443 | LZ00444 | LZ00445 | LZ00446 | LZ00447 |
| LZ007300 | LZ007310 | LZ007320 | LZ007630 | LZ007640 | LZ007650 | ||
Note: If your required part number is not listed, feel free to reach out for confirmation or custom matching.
Two Recommended Installation Methods
Installation Method 1: Mounting Pin & Hand Pressure
- 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
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.
O ring installation
PTFE Slip Ring Install
Calibration
Both methods are effective depending on your equipment setup. Always ensure the components are clean and well-lubricated before installation.
Material & Performance
The seals are made from high-grade polyurethane, NBR (nitrile rubber), and PTFE for excellent resistance against heat, hydraulic fluid, pressure, and abrasion. They maintain flexibility and sealing properties over long service cycles.
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.
