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General| Brand | Craftsman |
|---|---|
| Model | 139.18876 |
| Category | Garage Door Opener |
| Language | English |
Assembling the main rail and attaching the cable pulley bracket.
Attaching the trolley assembly to the T-rail.
Connecting the assembled T-rail to the opener unit.
Installing the chain/cable and covering the sprocket.
Adjusting chain tension and securing it.
Identifying and marking the correct position for the header bracket.
Securely mounting the header bracket to the wall or ceiling.
Connecting the main opener rail to the installed header bracket.
Placing the opener unit correctly relative to the garage door.
Securely mounting the opener unit to the garage structure.
Understanding the power connection needs and safety.
Mounting the safety sensors that detect obstructions.
Attaching the bracket to the garage door itself.
Verifying the safety reversing sensor is functioning correctly.
Final test to ensure the door reverses on obstruction.
