Force Adjustments - Craftsman 139.53678SRT Owner's Manual

1/2 hp
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Adjustment
Step 2
I
Adjust
the Force
I
Force adjustment controls are located on the dght
side panel of the opener. Force adjustment settings
regulate the amount of power required to open and
close the door.
The door will stop in the up 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 may be
interrupted by nuisance reversals in the down
direction and stops in the up direction. Weather
conditions can affect the door movement, so
occasional adjustment may be needed.
The maximum force adjustment range is 260 degrees,
about 3/4 of a complete turn. Do not force controls
beyond that poinL Tum force adjustment controls
with a screwdriver.
AdjustmentI.ab_
Too much force on the €loor will Interfere with
the proper
operation
of the safety reverse
system.
The door might not reverse properly
when required
and could seriously
Injure or
kill someone
under it. Do not Increase
the
force beyond the minimum amount required
to close
the
door.
Do not use the
force
adjustments
to compensate
for a binding or
sticking garage door. Test the safety reverse
system
following
all adjustments
to force
levels. See page 30.
ForceAdjustment
Right Side Pane4
How and When to Adjust the Forces
Test the DOWN (close) rome
Grasp the door bottom when the door is about
halfway through DOWN (close) travel. The door
should reverse. Reversal halfway through down
travel does not guarantee reversal on a two-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 10 degree turn adjustments until the door
reverses normally. After each adjustment, run the
opener through a complete cycle.
Test the UP (open) force
Grasp the door bottom when the door is about
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
countemlockwise.
Make 10 degree turn adjustments until the door stops
easily. After each adjustment, mn the opener through
a complete travel cycle.
If the door doesn't open at least 5 feet
Increase UP (Open) force by tuming the control
clockwise. Make 10 degree turn adjustments until
dqor opens completely. Re-adjust the UP limit if
necessary. After each adjustment, run the opener
through a complete travel cycle.
If the door reverses during the down (close) cycle
and'the opener lights arenl fleehlng
Increase DOWN (close) force by tuming the control
clockwise. Make 10 degree turn adjustments until the
door completes a close cycle. After each adjustment,
run the opener through a complete _:ravelcycle. Do
not Increase the force beyond thtt minimum
amount required to close the door.
29

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