Description
Overview:
This Genuine Atlas Copco decompression valve is a service part for petrol-powered Cobra breakers, including the Cobra TT and Cobra PROi. It threads into the cylinder head to vent combustion pressure during starting, reducing pull force on the recoil starter and helping the engine fire more easily. Built with a durable metal body and a precision internal valve mechanism, it is designed to cope with heat, vibration, and frequent use on site. As an authentic Atlas Copco component (MPN 9234 0003 40 / 9234000340), it offers a secure fit and consistent performance with the original equipment. It is a straightforward replacement for worn or sticking valves that can make starting difficult, helping keep your breaker reliable and productive.
Key Features:
- Genuine Atlas Copco part for assured compatibility and quality
- Reduces cylinder pressure for easier, more controlled starting
- Helps prevent excessive strain on the recoil starter and starting cord
- Robust metal construction for heat and vibration resistance in tough conditions
- Precision threads for a proper seal in the cylinder head port
- Supports consistent engine performance and idle stability
- Can help reduce kick-back on start and improve cold-start behaviour
- Simple, quick installation with basic hand tools
- Suitable for routine maintenance or as a like-for-like replacement
- Matches original specification (MPN 9234 0003 40 / 9234000340)
Typical Applications:
Used on Atlas Copco Cobra petrol breakers to aid starting before daily work, after refuelling, following plug or carburettor service, and in colder weather. Ideal for operators who need dependable starts on pavements, asphalt, concrete, post-driving, and general demolition tasks where downtime must be kept to a minimum.
Also known as:
Decomp valve, start-assist valve, cylinder vent valve, pressure bleed valve, compression release valve, engine starting valve, cylinder pressure reducer, vented starting valve.
Fits Models:
Cobra TT, Cobra Mk1, Cobra PROi, Cobra Pro
Alternate Part Numbers:
9234000340, 831 225, 831225
Product Specifications
| L&S Part No. | 9234 0003 40 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Atlas Copco |
| OEM No. | 9234000340 |
| Unit of Sale | 1 |
| Applications | Cobra Mk1, Cobra PROi, Cobra Pro, Cobra TT, CobraMk1, CobraPROi, CobraPro, CobraTT |
| Fits Brands | Atlas Copco |
| Fits Models | Cobra TT | Cobra PROi | Cobra Pro | Cobra PROe |
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