Pins, bushes and links
the bucket link, the ram links in a pair, and the pins in their bushes.
Illustration based on an existing product.
Every joint of the arm is a pin in a bush.
When play appears, it is not the arm that is tired:
it is those parts, and they can be replaced.
Other names for this part: bucket pin, joint bush, link, bucket link, dipper arm pin, bearing.
- Family
- Wear parts
- Classes or machines concerned
- All
- Fitting
- As an original-equipment replacement, depending on the joint
- Power source
- None
What it is for
Right: a worn pin measures less than when new, and ordering from it means ordering too small.
What sets them apart:
the size is measured on the part once removed — a worn pin measures less than it did when new.
Computer-generated image.
Caught early, the play is repaired; caught late, it has to be rebored.
Synthetic video.
The pin goes through, the bush guides, the link transmits.
Together, they take everything the ram sends, thousands of times a day.
Their wear is seen before it is heard:
a bucket that moves sideways, play you feel when a movement is taken up again, a grease point that no longer holds.
Caught early, the repair is a part; caught late, it is a re-boring job.
A worn pin damages its housing. That is the difference between replacing a pin and having an arm re-bored:
the first job costs a part and an hour, the second puts the machine out of service and calls for a workshop.
On which machine?
These articulation parts for the arm and the bucket apply to all machines.
They are fitted to replace the original parts, depending on the joint.
What the tool does
Pins, bushes and links are wear parts of the machine.
The weight of a part: we calculate it with you for your machine.
What is needed on the hydraulic side
They need no power source: they are parts of the machine.
Your study sets the exact value for your machine.
Have your machine checked.
Tell us your machine model and the joint concerned.
A photograph of the play, with the bucket resting on the ground, often tells us more than a description.
- Your machine Its exact make and model.
- What is fitted What equips the machine today.
- The work What the machine is used for.
Without these details, the study still begins: we will ask you for them.
Or call 01 84 16 55 49 · our lines are open 7 days a week, from 7h to 22h.
Written study within 3 working days, once the file is complete.
What determines the choice
-
01 — The exact size
Diameter and length are measured on the part once removed, never from a catalogue alone.
A worn pin measures less than it did when new. -
02 — The treatment of the pin
Chromed, hardened, nitrided:
the treatment decides the resistance to abrasion, and therefore the interval. -
03 — The type of bush
Greased bronze or self-lubricating bush:
one calls for regular maintenance, the other does away with it and costs more. -
04 — Access to the grease point
A bush that cannot be greased is a bush that will be replaced soon.
Sometimes it is the grease nipple that has to be looked at.
What is checked before ordering
- Measure the removed pin with a vernier caliper, at two points at least:
it wears oval. - Check the housing as much as the pin.
An ovalised housing will give the play back within a few weeks. - Note the exact position of each pin:
an excavator has about fifteen of them, and few are identical. - Take advantage of the removal to check the grease nipples:
it is the cheapest opportunity to do it.
- Family
- Wear parts
- Compatibility
- The seven criteria in detail →