MLT PLYS 15, User Manual, Page: 7 / 16

Also, use a 5mm. Allen key to the arm.
Once the blade arm assembly has been taken off, loosen the two M8 bolts that fix the blade to the support, with a 13mm key.
Remove the old blade and insert the new one, up to the limit set by the two adjustment screws in the rear. These two limiting
screws in the rear determine the proximity of the blade to the pinch rollers.