A high-quality 125/81200 slew lock pin by CORESPEX. This is a critical safety component designed for JCB 3CX and 4CX backhoe loaders. It is used to mechanically lock the excavator arm's slew (e.g., for transport or when using a breaker). The pin features a flange/collar for easy handling and is supplied complete with a retaining cable to prevent loss.
CORESPEX products are the choice for professionals. We specialize in supplying top-tier pins and bushings for construction machinery. Our components, made from certified steel and precision heat-treated, guarantee unparalleled durability and a perfect fit, minimizing downtime and service costs.
| Brand | Type / Series / Model |
|---|---|
| JCB | Backhoe Loaders: 3CX, 4CX |
The list above is for reference. It is crucial to verify the dimensions (40 x 175 mm) in your machine.
This pin operates within the kingpost (sideshift frame) bores. When replacing, we recommend checking the bushings in the lock bores and the condition of the retaining cable.
Never attempt to slew the excavator arm while the 125/81200 lock pin is engaged. This can lead to shearing the pin, destroying the kingpost housing, or damaging the slew rams. Before operating the backhoe, always ensure the pin is removed and securely stowed.
The 125/81200 pin is a manual lock for the backhoe slew mechanism. It is inserted through special holes in the sideshift frame (kingpost) and slew carriage to lock the arm in the center position. This is essential for road transport and for operating certain attachments (like hydraulic breakers) to prevent unwanted arm swing.
📞 Can't find the part you're looking for?
No worries. Our website features only a few thousand of the over 60,000 parts we have in stock. Contact us – we likely have what you need readily available!
This is a safety pin used to mechanically lock the backhoe arm (kingpost) in the center position, which is required for road transport or when using a hydraulic breaker.
The retaining cable (lanyard) is used to attach the pin to the machine's frame. This prevents it from being lost when it is removed from the bore during normal digging operations.
No. This pin is for machines with the "old type" slew system (using a rack and pinion). Newer machines with a slew ring (turntable) have a completely different, often automatic, slew lock system.
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.
Data sheet
Specific References
Manufacturer
Responsible person








Suitable for JCB 3CX 4CX backhoe loaders.

















