I am about to do the same thing. Unfortunately for me I was replacing the awning arm and did not have the torsion assembly pinned as suggested. Needless to say it unwound and snapped the end casting bracket and took a small bite of my little finger. These things bite pretty hard so make sure to pin the torsion assembly with a 5” x 5/16 bolt to prevent it from becoming unwound. I found a recent video from a local RV expert repair guy that details the job pretty good.
Spring unwound on Dometic 9100 power awning
in Technical Tips and Tricks
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I am about to do the same thing. Unfortunately for me I was replacing the awning arm and did not have the torsion assembly pinned as suggested. Needless to say it unwound and snapped the end casting bracket and took a small bite of my little finger. These things bite pretty hard so make sure to pin the torsion assembly with a 5” x 5/16 bolt to prevent it from becoming unwound. I found a recent video from a local RV expert repair guy that details the job pretty good.