Table Of Contents; A Review Of Safety Alert Symbols - Craftsman 139.53978SRT Owner's Manual

Contents Page
A review of safety alert symbols ................................. 2
You'll need tools.......................................................... 3
Safety information regarding garage door locks
and ropes .................................................................. 3
Testing your garage door for sticking, binding
and balance ............................................................... 3
Illustrationof sectional door installation ..................... 4
Illush'ationof one-piece door installation................... 5
Carton inventory.......................................................... 6
Hardware inventory..................................................... 7
Assembly section - pages 8 - 11
Assemble the rail & install the trolley........................ 8
Fasten the rail to the opener ..................................... 9
Install the idler pulley ................................................ 9
Install chain/cable & attach the sprocket cover......10
Tighten the chain .................................................... 11
Installation section - pages 11 - 27
Installationsafety instructions................................. 11
Determine header bracket location
Sectional door ....................................................... 12
One-piece door ..................................................... 13
Install the header bracket ....................................... 14
Attach the rail to header bracket ............................ 15
Positionthe opener ................................................. 16
Hang the opener ..................................................... 17
Install the door control ............................................ 18
Contents Page
Install the light and lens ................................................. 19
Attach emergency release rope and handle ................. 19
Electrical requiramemts ................................................. 20
Safety reversing sensor information.............................. 21
Install the safety reversing sensor........................... 22, 23
Fasten door bracket (sectional door) ............................ 24
Fasten door bracket (one-piece door)........................... 25
Connect door arm to trolley (sectional door)................. 26
Connect door arm to trolley (one-piece door) ...............27
Adjustment section - pages 28 - 30
Travel limit adjustments ................................................. 28
Force adjustments ......................................................... 29
Test the safety reversing sensor ................................... 30
Test the safety reverse system .................................... 30
Operation safety instructions........................................... 31
Care of your opener ......................................................... 31
Maintenance schedule .................................................... 31
Operation of your opener ................................................ 32
Receiver and remote control programming .................... 33
Having a problem? .................................................... 34, 35
Repair parts, rail assembly .............................................. 36
Repair parts, installation.................................................. 36
Repair parts, opener assembly ....................................... 37
Accessories...................................................................... 38
Index ................................................................................ 39
How to order repair parts ................................................. 40
Warranty .......................................................................... 40
Start by reviewing these important safety alert symbols
Mechanical Electrical
When you see this Safety Symbol on the following pages, it will alert you to the possibility of damage
to your garage door and/or the garage door opener if you do not comply with the corresponding
instructions. Read the instructions carefully.
This garage door opener is designed and tested to offer safe service provided it is installed, operated,
maintained and tested in strict accordance with the safety instructions contained in this manual.
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