Did your FSM mention the little hold down bolt at about where you describe...?...On the outer case...I forgot about that.....It has to come out to let the chain fall away from that area....sorry about that.......
Always good to post when you hit a snag.....smart move....
But sounds like you are making good progress...

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1978 Yellow 300D (The Mustard Toad)
1980 Blue 240D (The Iron Toad)
1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad)

(Open the pod bay doors HAL)