3CX, 4CX
The arm link is a key element of the backhoe attachment's kinematics. It transfers immense forces between the hydraulic ram and the dipper arm, enabling the bucket's movement and breakout force. If your machine is experiencing a "rattling" arm, noticeable play during operation, or has visible oval-shaped pin holes, it is a sign that the link is worn. Operating with a damaged link leads to faster wear of pins and bushings and excessive strain on the hydraulic rams.
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Eliminating play allows for precise bucket operation, which is crucial for grading and finishing work.
Smooth operation without jerks and impacts protects hydraulic rams and hoses from sudden pressure spikes.
Replacing a worn link is a durable repair that prevents accelerated wear of pins and bushings.
For the most durable result and complete elimination of play, the linkage should always be replaced as a set with new pins and bushings.
After installation, make sure all grease points near the new link are clear and regularly apply grease to ensure maximum part life.
Answer: The main cause is a lack of regular lubrication and operating with already worn, loose pins and bushings, which leads to the pin holes becoming oval-shaped.
Question: Does this link fit newer JCB models?Answer: No, this model is designed for older machine models. Newer versions of the 3CX and 4CX require different linkages, which are also available in our offer.
If you are unsure whether the selected product is suitable for your machine, contact us and we will help you choose the right part and provide practical advice in minutes.
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JCB 3CX, 4CX

















