LiftMaster TDC Installation Manual - English French Spanish - Page 15

TDC Trolley Installation (continued) Attach the Door Arm and Bracket 1. Latch the door arm to the trolley. Make sure the open side of the notch on the door arm faces the door. 2. Position the door bracket to the center line of the door and attach the door bracket to the door using appropriate hardware (not included). NOTE: When properly installed and adjusted the door arm should be leaning back toward the operator slightly. Refer to door manufacturer's instructions for recommended installation guidelines. HARDWARE A Flanged Hex Nut 3/8"-16 (2) B Nylok Nut 3/8"16 (1) C Bolt 3/8"-16 x 1" (3) C A B WARNING To prevent possible SERIOUS INJURY from a moving chain: • DISCONNECT electric power to the operator BEFORE manually operating your door. • If possible, use emergency disconnect ONLY when door is CLOSED. Weak or broken springs or unbalanced door could result in an open door falling rapidly and/or unexpectedly. • NEVER use emergency disconnect unless doorway is clear of persons and obstructions. 15