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General| Brand | Craftsman |
|---|---|
| Model | 139.53978SRT |
| Category | Garage Door Opener |
| Language | English |
Details on how to assemble the garage door opener rail and install the trolley.
Instructions for attaching the assembled rail to the opener powerhead.
Steps for installing the idler pulley onto the rail assembly.
Guides on installing the chain/cable and securing the sprocket cover.
Instructions for properly tightening the chain on the opener assembly.
How to determine the correct location for the header bracket above the garage door.
Specific guidance for determining header bracket location for one-piece doors.
Instructions for mounting the header bracket to the wall or ceiling.
Procedures for connecting the opener rail to the installed header bracket.
Instructions on how to position the opener unit correctly relative to the door.
Steps for securely hanging the opener unit to structural supports in the garage.
How to install the wall-mounted door control and wiring.
Instructions for installing the light bulb and lens cover on the opener.
How to attach the emergency release rope and handle to the opener.
Information on electrical connections and requirements for the opener.
Step-by-step guide to installing the safety reversing sensor brackets.
Procedure to test the functionality of the safety reversing sensor.
Procedure to test the door's safety reverse system against an obstruction.
A schedule for routine maintenance tasks like chain tension and lubrication.
Specific instructions on using the wall-mounted door control button.
Lists and illustrates various replacement parts for rail assembly.
Lists and illustrates replacement parts for the opener installation.
Step-by-step guide for programming the Keyless Entry system.
