User's Manual

GRN4-610 Chapter 5: Maintenance 56 of 73
Mounting the bed knives
Follow the steps below to mount the bed knives.
1. Clean the knife supporting surface and the holes on the knife holder.
2. Insert sharp knife or turn old knife.
3. Attach the knife adjusting bolts.
4. Attach the knife mounting bolts (DIN912 – M12x55 – 12.9) and tighten lightly at
first.
5. Adjust the gap between the cutters and bed knives to 0.03 in. to 0.04 in. (.8 –
1mm).
6. Tighten the knife mounting bolts using a torque wrench. The required torque for
all knife mounting bolts is 120 Nm (refer to the torque values table).
7. Turn the rotor by hand.
8. Make sure the cutting gap is correct and that the cutters and bed knives do not
collide as the rotor turns.
9. Return the cover plates and mount them with the bolts.
10. Remove tools and other objects from the cutting chamber.
11. Switch ON the shredder for a brief time without grinding material; listen for
noises. If unusual noises are present, determine the cause and eliminate it.