Description
Overview:
This Genuine JCB Extension Ram Seal Kit is a complete set of seals for the extension cylinder on the JCB 540-170 telehandler. Supplied under Manufacturer Part Number (MPN) 551/90191, it uses durable, oil-resistant sealing materials engineered for heavy-duty hydraulic use. The kit restores correct sealing between piston, rod and gland, stopping leaks and helping the ram hold pressure and position under load. Built to OEM dimensions for a direct fit on the 540-170 extension ram, it supports smooth boom extension and retract, consistent hydraulic performance, and reduced downtime. Suitable for workshop or on-site maintenance, it is a practical choice for tradespeople, fleet managers and DIY users needing to reseal a tired or leaking extension cylinder with reliable, long-lasting components.
Key Features:
- Genuine JCB part for assured compatibility and performance (MPN 551/90191)
- Direct fit for the extension ram on JCB 540-170 telehandlers
- High-quality sealing materials resist hydraulic oil, wear and extrusion
- Helps prevent external and internal leaks to maintain system pressure
- Promotes smooth cylinder stroke and stable boom positioning under load
- Supports quick turnaround with straightforward fitting using standard tools
- OEM-spec dimensions and profiles for correct tolerances and sealing integrity
- Suitable for routine servicing or full extension cylinder overhauls
- Designed for reliability in demanding site and yard conditions
Typical Applications:
Used when resealing the extension boom cylinder to cure leaks, loss of pressure or drift. Ideal for scheduled maintenance, pre-season checks, and mid-life rebuilds on JCB 540-170 machines. Suitable for workshop refurbishment or urgent on-site repairs to keep telehandlers safe, efficient, and productive across construction, agriculture, hire fleets, and materials handling.
Also known as:
Hydraulic cylinder seal kit, boom extension cylinder seal pack, ram repair kit, gland and piston seal set, hydraulic ram packing kit, extension cylinder service kit, rod and wiper seal set, boom ram reseal kit.
Fits Models:
540-170, 540/170, 540170
Alternate Part Numbers:
55190191
Product Specifications
| L&S Part No. | 551/90191 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JCB |
| OEM No. | 551/90191 |
| Unit of Sale | 1 |
| Applications | 540-170, 540/170, 540170 |
| Machine Type | Telehandlers |
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