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TABLE OF CONTENTS
Safety symbol and signal word review.......................2
Carton inventory........................................................ 6
Hardware inventory................................................... 7
Assembly
8-11
Install the chain/cable and the sprocket cover..........10
Installation safety instructions.................................11
Adjustment
27-29
Adjust the travel limits..............................................27
Operation
Program Craftsman Garage Remote 139.53681b
30-34
Craftsman 139.53681b Replacement
Operation safety instructions................................... 30
Care of your garage door opener............................ 32
Diagnostic chart.......................................................34
To erase all codes................................................... 35
Multi-function remotes............................................. 35
To add, reprogram or change a Keyless Entry PIN ..36
Accessories
39
Repair Parts
and Service
Back Cover
INTRODUCTION
Safety Symbol
and Signal Word Review
This garage door opener has been designed and tested to offer safe service provided it Is installed, operated,
maintained and tested in strict accordance with the Instructions and warnings contained in this manual.
ák
WARNING
Mechanical
A WARNING
Electrical
CAUTION
When you see these Safety Symbols and Signal
Words on the following pages, they will alert you to
the possibility of serious injury or death If you do
not comply with the warnings that accompany them.
The hazard may come from something mechanical
or from electric shock. Read the warnings carefully.
When you see this Signal Word 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 cautionary statements
that accompany it. Read them carefully.