Description
Overview:
The Cylinder Top Seal suits JCB HM25 Hydraulic Breaker and is designed to keep the breaker's hydraulic system sealed at the cylinder top/cap. This genuine JCB part is manufactured to OEM specification (OEM No. 929/05317) for an accurate fit and reliable sealing performance. Made from tough, oil‐resistant elastomer, it helps maintain system pressure, prevents hydraulic oil leaks, and supports consistent hammer impact. It is intended for use in JCB hydraulic breakers, specifically the HM25, where correct sealing is essential to efficiency and component life. By replacing a worn or flattened top seal with this genuine item, users can reduce fluid loss, improve reliability, and extend service intervals on site tools and plant fitted with the JCB HM25 breaker.
Key Features:
- Genuine JCB part for quality and compatibility (OEM No. 929/05317)
- Direct fit for the cylinder top/cap area on the HM25 hydraulic breaker
- Oil, heat, and vibration resistant elastomer for dependable sealing under pressure
- Helps restore hydraulic pressure and consistent hammer performance by preventing leaks
- Durable construction suited to heavy site and demolition environments
- Precise dimensions to OEM standard for quick, straightforward fitting
- Supports preventative maintenance and reduces unplanned downtime
- Compatible with typical mineral oil-based hydraulic fluids used in breakers
- Stable sealing performance aids efficiency and protects adjacent components
- Suitable for routine overhaul of the breaker's upper cylinder assembly
Typical Applications:
Used during service or repair of the JCB HM25 hydraulic breaker to stop oil leaks at the cylinder top, maintain impact energy, and protect the hydraulic power pack. Common in concrete breaking, asphalt and paving removal, trenching, site demolition, landscaping, and utility works where reliable breaker performance is required.
Also known as:
Cylinder head seal, top cap seal, breaker hammer top seal, upper cylinder seal, seal ring for HM25, hydraulic cylinder top seal, top cover seal, OEM 929/05317 seal.
Fits Models:
HM25
Alternate Part Numbers:
929 05317, 92905317
Product Specifications
| L&S Part No. | 929/05317 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JCB |
| OEM No. | JCB92905317 |
| Unit of Sale | 1 |
| Size | Diameter: 40mm |
| Applications | HM25 |
| Machine Type | Breakers |
| Fits Brands | JCB |
| Fits Models | HM25 |
