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28
1/2 HP Chain Drive Garage Door Opener
Connect the Door Arm to the Trolley:
1. Close the door and connect the end of the curved arm section to the connector hole on the trolley with a
clevis pin (
∅
8-25) and split pin.
2. Run the opener through a complete travel cycle before making any adjustments. If the door has a
downward slope in the full open position as shown above with the dotted line drawing, decrease the UP
limit travel until the door is parallel with your garage floor (see Testing & Adjusting the Door Range of
Motion) on the next page.
Door with a downward slope
Door parallel to the garage floor
Fully closed position