First, we need to disassemble the shredder's shredding box, and then place it on the flat ground stably to avoid damage to it.

Next, remove the sealing ring of the cutter box and disassemble the complete cutter shaft.

Next, you need to find the other end of the cutter shaft with the belt pulley installed, disassemble the circlip on the shaft, and use a hammer to hit it gently. After the circlip is disassembled, the cutter head can be disassembled piece by piece. In case of severe combination between the blade and the shaft, use a hammer to hit the blade and the wood backing plate lightly. If it still cannot move, it needs to be disassembled. Find the damaged blade to replace it, and then install it with the original seal.

Finally, when replacing the blade, be sure to put safety first!