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General| Brand | Craftsman |
|---|---|
| Model | 139.53640SRT |
| Category | Garage Door Opener |
| Language | English |
Safety advice on door balance and tool usage.
Critical safety rules for the installation process.
Essential safety standards for electrical connections.
Detailed explanation and safety of the reversing sensor.
Guides assembly of the T-rail, trolley, and pulley bracket.
Covers chain/cable installation and sprocket cover attachment.
Guides header bracket location and mounting the opener.
Provides instructions for installing the safety reversing sensor.
Guides on fastening the door bracket and connecting the door arm.
How to set the travel limits for door operation.
How to adjust the force settings for opening and closing.
Procedures for testing the safety reversing sensor and system.
Information on remote control and routine maintenance tasks.
How to activate the opener and use wall control features.
Troubleshooting steps for common opener and door problems.
Lists parts for rail, installation, and opener assemblies.
