The company I work for just go a Nomura NN 25YB swiss machine and I have been tasked with setting it up. For the life of me I cannot figure out how to change out the guide bushing. I attempted loosening what I thought to be the nut on the back of guide bushing, but it turns really hard. I am thinking there is a step I have missed. I called Gosiger and they sent me a procedure, but it is not very descriptive. Can someone please give me a step by step process on how to change out the bushing? I will be very greatful! Thanks in advance.

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