Description
Overview:
This Cylinder Bottom Seal is a genuine JCB part for the HM25 hydraulic breaker, supplied to restore factory sealing performance at the base of the cylinder. Made from a durable, oil-resistant elastomer, it helps contain hydraulic pressure, prevents fluid leaks, and supports the breaker's anti-vibration characteristics during heavy use. The seal is engineered for a precise fit on the HM25 to minimise bypass and maintain impact energy, improving reliability and service intervals on site. Its robust construction suits frequent breaking work in construction, utilities, landscaping, and demolition. Backed by JCB's quality standards and identified by OEM No. 904/20206, it is a dependable choice for planned maintenance or repair, whether you're a plant operator, contractor, or DIY user maintaining a breaker.
Key Features:
- Genuine JCB component for assured compatibility and performance (OEM No. 904/20206)
- Precisely matched to the HM25 hydraulic breaker for a secure, leak-tight fit
- Oil- and hydraulic-fluid-resistant elastomer for durability in tough conditions
- Helps prevent pressure loss and oil weeping to maintain consistent blow energy
- Anti-vibration focused design supports tool longevity and smoother operation
- Stable dimensions reduce blow-by and premature wear of adjacent parts
- Straightforward to fit during a routine strip-down, helping reduce downtime
- Suitable for use with common mineral-based hydraulic oils used in breakers
- Supports correct system efficiency, helping protect pumps, valves, and bushing
Typical Applications:
Ideal for scheduled servicing or repairs of JCB HM25 breakers showing signs of oil leaks, reduced impact performance, or contamination around the lower cylinder. Commonly used by contractors, plant hire fleets, groundworkers, and facilities teams to restore sealing integrity, extend service life, and keep equipment working efficiently on site.
Also known as:
Cylinder bottom seal, lower cylinder seal, base seal, breaker seal, hydraulic breaker seal, HM25 seal, JCB hydraulic seal, sealing ring for breaker cylinder, lower end seal.
Fits Models:
HM25
Product Specifications
| L&S Part No. | 904/20206 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JCB |
| OEM No. | JCB90420206 |
| Unit of Sale | 1 |
| Size | Diameter: 38mm |
| Applications | HM25 |
| Machine Type | Breakers |
| Fits Brands | JCB |
| Fits Models | HM25 |
