I have an SN93. I am curious to know why it has 6 large allen head screws through the front housing, i.e., pulley side. I have seen another SN series with the same design. It too was a SN93 so I am assuming the design was unique to SN93's. Besides purpose, what is the torque on these bolts. I am going to try to attach a photo, but since this is my first posting we will have to see if it works.
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