40 Bend-Tech Dragon A400
Maintenance & Troubleshooting
Chuck
09
Removing and Cleaning Chuck Jaws
Chuck jaws can be removed without removing the Chuck from the shaft.
1. Use the Chuck key to open the Chuck jaws as far as possible. When the Chuck jaws stop
moving the Operator should be able to lift them out of the Chuck.
2. Clean the Chuck jaws with brake cleaner and a rag.
3. Chuck jaws should be re-installed in the same position on the Chuck from which they
were removed. The Chuck and Chuck jaws are numbered. The Operator should match the
Chuck jaws to their corresponding positions on the Chuck.
4. Install the Chuck jaws on the same rotation of the Chuck key. This will ensure they are all
the same distance from the center of the Chuck.
Removing The Chuck
The Chuck is secured to the Chuck Shaft with three M10 x 1.5mm button head cap screws.
Older machines may be equipped with regular cap screws. Button head cap screws require a
screws to remove the Chuck from the Chuck shaft.
When installing the Chuck, tighten the screws then give each one another quarter turn.
Cleaning The Chuck
Over time, the inner mechanism of the Chuck can become dirty, causing it to operate poorly.
Cleaning the inner mechanism can help the Chuck work smoothly again.
1. Remove the Chuck from the Chuck shaft. Refer to Removing the Chuck in this chapter.
2. Remove the Chuck jaws, noting the location of each jaw so it can be reinstalled in its
original location.
3. Clean the Chuck with brake cleaner, spraying the inner mechanism as much as possible. If
the Operator has access to a parts washer it is recommended the Chuck be cleaned in this
4. With the Chuck clean, lightly lubricate the inside with a quality spray lubricant.
5. Reinstall the Chuck jaws, ensuring they are installed in the same location and on the same
rotation of the Chuck key.
6. Reinstall the Chuck. Tighten the Chuck mounting screws then give each screw another
quarter turn.
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