A high-quality lower kingpost pivot pin, made of high-strength, surface-hardened steel. It is a key component of the joint connecting the kingpost to the sideshift carriage. Its function is to bear the enormous forces generated during backhoe operation and to ensure smooth slewing. Precision manufacturing and proper hardness guarantee maximum service life.
Aftermarket quality product – an intelligent choice combining excellent quality with an attractive price.
| Brand (Machine Type) | Model |
|---|---|
| JCB (Backhoe Loaders) | 3CX, 4CX |
The list above is for reference. Before purchasing, we recommend verifying the dimensions on your machine.
Replacing kingpost pins requires dismantling heavy backhoe arm components. Always secure the arm from falling using the service lock and certified axle stands. Never rely solely on the machine's hydraulics. Use safety glasses and gloves.
For a complete joint refurbishment, always replace pins in a set with new bushings and seals. Regular greasing of the joints with high-quality HYPTRON grease with molybdenum disulfide (MoS2) drastically extends the life of the pins and bushings.
The pin is the pivot axis for the kingpost. A worn or cracked pin leads to play, which damages the bores in the kingpost and carriage (a "sloppy" joint), which in turn requires a very expensive re-boring repair.
Ignoring play leads to wear in the kingpost and carriage bores.
The cost of re-boring worn-out holes is many times greater than the cost of a preventative replacement of pins and bushings. Protect your machine from expensive repairs – order a complete GX-AFTER set and restore the factory rigidity to the joints.
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Play in the backhoe can come from many places. This pin eliminates play at the lower kingpost mounting to the carriage. You should also check the upper mounting, bushings, slew ram pins, and wear pads. A comprehensive repair requires assessing and replacing all worn components.
2. How can I check if a pin is worn?A worn pin often has a visible "step" or an oval cross-section where it has been working in the bushing. You can measure it with a caliper in several places to check if its diameter is uniform along its working length.
3. What happens if I keep working with a worn pin?Prolonged operation with a loose pin causes the bores in the kingpost and carriage to wear out. The holes become oval, and their repair is very expensive and requires specialized machining (a mobile line boring machine). In extreme cases, the pin can break, leading to a dangerous failure.
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Working Precision
Eliminates play and restores arm rigidity.
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Machine Protection
Protects expensive components from wear.
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High Durability
Hardened steel resistant to abrasion and cracking.
Have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you choose the right part to get your equipment back to work as soon as possible.
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