MSW Motor Technics MSW-MBS680H Manuel D'utilisation page 31

a) Insert the blade between the bearings (2) of the guide, first on one side and
then on the other, so that the back of the blade touches the bearings at the
bottom of their guides.
b) Move the blade around the drive roller wheels and slide the other side of the
blade into the top and bottom handle until the back of the blade touches the
underside of the top and bottom handles.
c) Hold the blade in place while moving the blade tensioning lever
counterclockwise until it stops. Make sure the blade fits tightly in all guides
and the drive rollers rubber part. You can briefly run the unit "idle" to check if
the blade runs smoothly over the rollers.
3.3.
Working with the machine
ATTENTION: when cutting, it is important that at least 2 teeth of the blade are in
contact with the workpiece. Below are some examples of how to place the cutting
element and what position to avoid (2 nd picture below):