You can download the "pictures" from the Lewmar site. Here's and excerpt witht he instructions.

[Models] 14, 16, 30, 40, 44, 48, 50, 54, 58, 64, 66

1. Unscrew the top cap.
2. Lift off the feeder arm.
3. Rotate the stripper ring to the required position.
4. Replace the feeder arm in the correct position to
suit the stowage of the loose sheet (see note).
5. Check the condition of the ‘O’ ring in the top cap.
Replace if necessary. Lubricate with a light smear
of Lewmar winch grease and replace the top cap.

Note: When replacing the feeder arm, ensure the
stripper ring is correctly located within the groove on
the back of the feeder arm.