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    C&P Index Arm Adjustment
    From: Greg Rudzinski
    Date: 2016 Apr 24, 18:45 -0700

    My weather beaten Cassens & Plath started to show a great deal of side error for no good reason so the index arm was set to zero then wiggled as I looked through the x4 scope. Side error was seen drifting all over because of a loose index arm riding against the arc. The fix was to tighten up a pair of set pins above the micrometer worm gear that had worked loose over time.

    1-remove plastic micrometer cover on lower index arm (4 screws).

    2- loosen pin lock nuts (see image).

    3- screw down pins until just touching arc.

    4- screw down lock nut.

    5- install plastic cover.

    6- adjust out side error.

    There should now be no wiggle in the index arm through the arc.

    Greg Rudzinski


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