Wiesenfield WIE-CLI-200 Manual De Instrucciones página 28

To carry out the correct installation of the cutting blades, seat the blades
in the recess of the machine head. Slide the retaining bolt into the aligned
holes of the pair of blades. Fit the tension spring (A) and the nut (B) from
above. Perform the adjustment and maintenance of the cutting head
according to points 3.3.2.A and 3.3.3.
II. WIE-CLI-300
To properly remove the cutting blades, loosen the tension nut. Lay the
product on a hard surface so that the blade retaining screws are on top.
Loosen the retaining screws (with the screwdriver provided) and remove
the pair of knives.