Description
Overview:
The Cab Door Gas Strut is a Genuine JCB part for 3CX and 4CX backhoe loaders, supplied under MPN 331/66778. It is a sealed, nitrogen-charged support strut that controls the movement of your cab door, helping it open smoothly and stay held at a safe position. Built from robust steel with a corrosion-resistant black painted cylinder and a plated piston rod, it is designed for daily site use and variable weather. The strut mounts to the existing door and cab brackets using the original fittings, making replacement straightforward. It restores the correct damping and lift assist when the original unit has weakened, improving day-to-day access to the cab and reducing strain on hinges and latches.
Key Features:
- Genuine JCB part for assured fit and performance (MPN 331/66778)
- Heavy-duty steel construction with protective finish for long service life
- Controlled opening and closing helps prevent door slam and finger traps
- Assists in holding the door open at the designed position
- Direct replacement for the factory unit; no modifications to mounts
- Pre-charged gas design for consistent, smooth operation
- Reliable in typical UK site conditions, including cold and wet weather
- Helps reduce wear on hinges, latches, and door seals
- Suitable for regular, intensive use in construction and plant hire fleets
- Simple installation with basic hand tools
Typical Applications:
Replacement door support on JCB backhoe loader cabs to restore safe and smooth access. Ideal when the cab door drops, slams, or will not stay open. Used across construction sites, utilities, highways work, agriculture, and plant hire yards where frequent entry and exit demands reliable door control and improved operator safety.
Also known as:
Gas spring, gas ram, lift support, door stay, door support, cab door damper, pneumatic spring, strut damper.
Fits Models:
3CX, 4CX
Alternate Part Numbers:
331-66778, 33166778
Product Specifications
| L&S Part No. | 331/66778 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JCB |
| OEM No. | 331/66778 |
| Unit of Sale | 1 |
| Machine Type | Backhoe Loaders |
| Fits Brands | JCB |
| Key Features | - Genuine JCB part for 3CX and 4CX backhoe loaders - Heavy-duty steel with corrosion-resistant finish - Pre-charged gas design ensures smooth operation - Direct replacement; no modifications needed - Suitable for cold and wet UK site conditions |
| Fits Models | 3CX |
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