Valmar SWEETY 60 TTi Handling, Operating And Maintenance Manual page 62

Unscrew the cap (in counter-clockwise direction) and lift it from the lid.
Unscrew the top of the lid (in counter-clockwise direction) and remove it.
Lift the lid lever and remove the lower part of the lid.
unscrew the plastic bolt, take off the flue damper from the mixer, extract
the mixer from the basin:
Unscrew the plastic bolt (in counter-clockwise direction) from mixer shalft.
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PLASTIC BOLT