Excavator Seal Kits for JCB Boom Arm Bucket Hydraulic Cylinders
These JCB hydraulic seal kits are precision-engineered for optimal sealing in excavator boom, arm, and bucket cylinders. Each kit includes high-strength, heat-resistant components compatible with JCB’s popular machine series, helping extend service life and prevent hydraulic leakage in harsh conditions.
| 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.
JCB excavators depend on tight hydraulic control for lifting, digging, and handling tasks. Our seal kits are designed to meet the high standards of JCB cylinders, preventing internal oil leaks, dirt intrusion, and pressure loss. Suitable for both field repair and factory rebuild, our kits help reduce downtime and restore cylinder performance to OEM levels.
Material Composition & Advantages
Each seal kit is composed of multiple sealing elements, each made from specialized materials to suit its function:
- Dust Seals – PU material for abrasion resistance
- Rod Seals & Piston Seals – NBR or FKM for excellent oil resistance
- Buffer Rings – PTFE-based for low friction and high-temperature durability
- Back-Up Rings & Guide Rings – Nylon or POM for anti-extrusion support
- O-Rings – NBR/FKM for flexible sealing under varying pressure
These materials ensure resistance to high hydraulic pressure, abrasive dust, and temperature changes—ideal for construction, demolition, and earthmoving work.
Available Cylinder Kits
We supply seal kits for the following JCB 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.
Compatible JCB Excavator Models
Kits available for (but not limited to) the following models:
| MACHINERY MODEL NUMBER | ||||||||
|---|---|---|---|---|---|---|---|---|
| 331/39036 | 331/39041 | 331/39047 | 332/Y2186 | 332/Y3519 | 332/Y3543 | 332/Y5519 | 332/Y5599 | 332/Y6192 |
| 333/Y6023 | 332/Y6195 | 332/Y6440 | 332/Y6462 | 332/Y6519 | 332/Y6954 | 332/Y7633 | 333/Y10142 | 333/Y6024 |
| 333/Y8994 | 332-C7368 | 332-G9281 | 332-G9282 | 334-P0176 | 336-A0124 | 35-900808 | 550/41001 | 550/41002 |
| 550/41008 | 550/41747 | 550/42085 | 550/42098 | 550/42112 | 550/42126 | 550/42219 | 550/42243 | 550/42261 |
| 550/42835 | 550/42842 | 550/42847 | 550/42849 | 550/42854 | 550/42855 | 550/43774 | 550/90191 | 828/10371 |
| 991/00013 | 991/00014 | 991/00015 | 991/00016 | 991/00018 | 991/00025 | 991/00036 | 991/00052 | 991/00054 |
| 991/00058 | 991/00061 | 991/00069 | 991/00081 | 991/00095 | 991/00096 | 991/00097 | 991/00098 | 991/00099 |
| 991/00101 | 991/00102 | 991/00103 | 991/00105 | 991/00152 | 991/00156 | 991/00157 | 991/00158 | 991/00159 |
| 991/00167 | 991/10081 | 991/10129 | 991/10130 | 991/10142 | 991/10151 | 991/10152 | 991/10158 | 991/10820 |
| 991/20003 | 991/20009 | 991/20019 | 991/20021 | 991/20022 | 991/20023 | 991/20024 | 991/20025 | 991/20027 |
| 991/20030 | 991/20039 | 903-20190 | 903-20233 | 903-20265 | 903-20435 | 903/20839 | 903/20856 | 903/20862 |
| 903/21024 | 903-21049 | 903/21061 | 903/21071 | 903-21165 | 904/50020 | 904/20172 | 904/20281 | 904/50023 |
| 904/50033 | 904/50040 | 904/50047 | 904/50009 | 813/10061 | 813/40026 | 813/00426 | 813/00425 | 813/00427 |
| 998-10021 | 998-10022 | 998-10338 | 6900-0754 | 6900-0801 | LQU0082 | LQU0091 | LQU0142 | LQU0164 |
| 991/00107 | 991/00109 | 991/00110 | 991/00111 | 991/00115 | 991/00120 | 991/00121 | 991/00122 | 991/00123 |
| 991/00127 | 991/00130 | 991/00131 | 991/00142 | 991/00144 | 991/00145 | 991/00146 | 991/00147 | 991/00147P |
| LQU0166 | 25/624300 | 550/42383 | 991/00012 | 991/00055 | 991/00100 | 991/00163 | 991/20002 | 991/20029 |
| 903-20916 | 904/05100 | 998-10020 | LQU0165 | 991/00126 | 991/00148 | 332/Y6194 | 333/Y9235 | 550/41004 |
Need help identifying your seal kit? Send us your cylinder size or original seal part code—we’ll match it for you.
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
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
Quality Assurance
Each JCB seal kit undergoes strict inspection and testing, including:
- Dimensional tolerance check (±0.02mm)
- Hydraulic leak resistance simulation
- Material elasticity and temperature resistance tests
- Cleanroom-level packaging
Our products are export-ready, boxed with labels and sealed for moisture protection.
Why Choose Our JCB Seal Kits?
- Tailored to match JCB OEM standards
- Suitable for tough field conditions
- Fast and secure sealing restoration
- Full kit components — no missing parts
- Backed by material and fitment guarantee
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.
