Bernina 720 - Page 167

Care and maintenance
167
> Remove the hook.
> Clean the hook race with a brush and a soft cloth. Do not use any sharp objects.
> Add one drop of BERNINA oil down into the hook race.
> Add one drop of oil into each of the two oil depots so that the felts are damp, and make sure that the
red-marked surface of the hook sleeve remains free of oil.
> Hold the hook at the pin in the center with two fingers.
> Guide the hook, lower edge first, at an angle from above behind the hook race cover.
> Position the hook with the two lugs on the hook driver meeting the corresponding openings in the hook;
the colored mark on the hook driver should be visible through the hole in the hook.
> Insert the hook.
– The hook is magnetic and therefore fastened to the correct position.
> Close the hook race cover and the fastening bracket until the release bracket engages.
> As a check, turn the handwheel.
> Insert the bobbin case.
> Sew or embroider on a test fabric.