Why owners do it
A thumb turns the bucket into a grab, which is the single most useful addition for clearing and landscaping work.
What is involved
- Choose a mechanical thumb (fixed positions) or a hydraulic thumb (needs an auxiliary circuit).
- Measure the arm width and bucket pin diameter.
- Weld or bolt the mounting bracket to the arm, keeping welds away from cylinder mounts.
- Check thumb and bucket tips meet through the bucket range.
Typical parts
- Thumb kit sized to the arm and pin
- Weld-on or bolt-on bracket
- Cylinder and hoses for a hydraulic thumb
Check before you start
- Welding on the arm needs a competent welder and correct preparation.
- A thumb adds weight at the end of the arm and changes lifting stability.