12) connect door arm to trolley, Sectional doors only, Installation step 12 – Chamberlain 1280 - 1/2 HP User Manual

Page 22: Connect door arm to trolley, Hole alignment alternative

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12) connect door arm to trolley, Sectional doors only, Installation step 12 | Connect door arm to trolley, Hole alignment alternative | Chamberlain 1280 - 1/2 HP User Manual | Page 22 / 36 12) connect door arm to trolley, Sectional doors only, Installation step 12 | Connect door arm to trolley, Hole alignment alternative | Chamberlain 1280 - 1/2 HP User Manual | Page 22 / 36
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