Craftsman 139.53663SRT Owner's Manual page 29

Adjustment Step 2
Adjust the Force
Force adjustlnent controls are located on the right panel
of the opener. Force adjustlnent settings regulate the
alnount
of power required to open and close the door.
The door will stop in the zip direction if anything
interferes with its travel. The door will reverse in the
down direction if anything interferes with its travel
(including binding or unbalanced doors).
If the forces are set too light, door travel lnay be
intemlpted by nuisance revel_'als in the down direction
and stops in the lip direction. Weather conditions can
affect the door lnOvelnent, so occasional adjustlnent may
be needed.
The lnaxilnuln force adjustlnent range is about 3/4 of a
complete turn. Do not force controls beyond that point.
Turn force adjustlnent controls with a screwdriver.
Too muchforce on the doorwill interferewith the proper
operationof the safety reversesystem. The door might
not reverseproper/ywhen requiredand cou/d serious/y
injureor ki// someoneunderit. Do not increasethe force
beyondthe minimumamountrequiredto closethe door.
Do not use the force adjustmentsto compensatefor a
bindingor sticking garagedoor.Test the safety reverse
system monthly,and followingall adjustmentsto force
levels.See page30.
I
00000
Force Adjustment Label
Right Side
Panel
Force Adjustment
Controls
How and When to Adjust the Forces
Test the DOWN (close) force
Grasp the door bottom when the door is abom halfway
through DOWN (close) travel. The door should reverse.
Reversal halj_,ay through down travel does"not
guarantee reversal on a one-inch obstruction. See
page 30. If the door is hard to hold or doesn't reverse,
decrease the DOWN (close) force by turning the control
counterclockwise.
Make small adjustlnents until the door reverses normally.
After each adjustment, run the opener tl_ough a complete
cycle.
Test the UP (open) force
Grasp the door bottom when the door is abom halfway
through UP (open) travel. The door should stop. If the
door is hard to hold or doesn't stop, decrease UP (open)
force by turning the control counterclockwise.
Make small adjustlnents until the door stops easily. After
each adjustment, run the opener tluough a complete travel
cycle.
If the door doesn't open at least 5 feet:
Increase UP (Open) force by turning the control
clockwise. Make small adjustlnents until door opens
COlnpletely. Readjust the UP limit if necessary. After each
adjustlnent, run the opener through a complete travel
cycle.
If the door reverses during the down (close) cycle and
the opener lights aren't flashing:
Increase DOWN (close) force by turning the control
clockwise. Make small adjustments until the door
COlnpletes a close cycle. After each adjustlnent, run the
opener tluough a complete travel cycle. Do not increase
the force beyond the minimum amount required to
close the door.
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