A key element of the stabilizer system, the 811/90590 lower support pin by GX-AFTER. This is a precision-machined pin used to attach the stabilizer pad (foot) to the stabilizer leg in JCB 3CX and 4CX backhoe loaders. Its dimensions – 138 mm length and 44.95 mm diameter – ensure a perfect fit and a secure pivot joint for the foot.
GX-AFTER is the smart choice for your machine. We provide high-class replacements that combine excellent quality with an attractive price. Each part is carefully verified to ensure full compatibility and reliability you can depend on.
| Brand | Type / Series / Model |
|---|---|
| JCB | Backhoe Loaders: 3CX, 4CX |
The list above is for reference. It is crucial to verify the dimensions (44.95 x 138 mm) in your machine.
When replacing pin 811/90590, it is crucial to inspect (and usually replace) the bushings in the stabilizer leg and foot. A new pin retainer (e.g., lynch pin) is also required.
Failure of this pin (cracking, shearing, or falling out) is extremely dangerous. It can lead to the sudden collapse or slippage of the stabilizer foot during operation. This causes an immediate loss of machine stability, which risks overturning the machine, especially when digging on a slope or lifting heavy loads.
Pin 811/90590 serves as the hinge or lower pivot point for the stabilizer foot (pad). It allows the foot to articulate and adapt to uneven ground, while simultaneously transferring all the stabilizing pressure (often many tons) from the stabilizer leg to the foot and into the ground. It is one of the highest-load pins on the machine.
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The lower pin (811/90590) connects the foot (pad) to the stabilizer leg. The upper pin connects the stabilizer leg to the machine's frame (sideshift). They are two different pins with different dimensions and part numbers.
This is intentional (a clearance fit). The pin must be slightly smaller than the nominal 45 mm hole to allow for installation. The 44.95 mm diameter provides the correct running clearance for grease.
Yes, it is an alternative (superseded) number. 811/90590 is the newest, current part number for this pin.
Do you have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you select the right part to get your equipment back to work as quickly as possible.
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Suitable for JCB 3CX, 4CX backhoe loaders.

















