Adjustment #3: Setting Door Close Limit
Confirm trolley close position 9” to 10” between the
inside face of the door and the point where the door
arm connects to the trolley (see illustration) for a
sectional door (one piece door is approximately 32”).
If adjustment of the close trolley position is necessary,
activate the opener and move the trolley 12” to 18” to
provide access to the “Limit Stop” devices (mounted on
the chain). Move the limit stop to establish the correct
trolley close position as above.
Relocation of
“Limit Stop”
toward the door
increases down
travel.
Relocation of the
limit stop away
from the door
reduces down
travel. Note that
each chain link
provides 1/2” adjustment of trolley travel.
Cushion Arm
Assembly
Trolley - Close
Limit Position
Door
Bracket
9”to10”
110054-1
Chain
Limit Stop
Adjustment #1: Opening Travel
Your opener is assembled at the factory with the
trolley in the forward position with the open limit stops
snapped in place on the chain, set for a standard door.
If you door is non-standard, move BOTH open limit
stops, located just behind the trolley. As an example:
For a 6 FT, 6 INCH door, move both open limit stops
six inches or 12 links toward the power head unit.
To confirm final opening travel adjustment, activate
the opener to bring the foor to the fully open position.
When properly adjusted, center of the open limit stops
should come to rest opposite the load adjusting nut.
NOTE: If the door
drifts forward, move
the open limit stops
toward the power
head unit. If the door
does not drift forward
it is still advised that
you perform one
additional check.
Operate manual
release on the trolley
and allow the door to
seek its natural fully
open position, then
move the open limit
stops to align trolley
to this position. If the door does not open fully at
its natural open position, it indicates a door spring
or hardware problem that should be referred to a
door system professional.
Adjustment #2: Opening and Closing
Force
Hex nuts for adjusting force are located on either side
of the rail at the motor end. The left hex nut, labeled
“
CLOSE
”, adjusts the closing force; the right hex nut,
labeled “
OPEN
”, adjusts the opening force.
Turning the hex nuts clockwise increases force;
counterclockwise decreases force.
Your garage door opener is built with a safety system
that allows the door to reverse in the close direction
and stop in the open direction. This must be adjusted
so your opener does not use excessive force in the
down direction or react to the weight of the door
during upward travel.
To help determine that the force is not excessive, grasp
the door handle or bottom edge during downward
travel. The opener
should reverse to
this force. Do not
stand under the
door during this
test.
If the handle is
hard to hold and
the door does not
reverse, adjust the
CLOSE
hex nut to decrease force
until the door reacts properly.
Repeat the adjustment procedure for upward travel.
The door should stop without using excessive force.
Open Adjustment Nut
Close Adjustment Nut
Leave One Link Open
Between the Two Open
Limit Stops
Limit Stops
Chain
Load Adjusting Nut
Limit Stops
110056-2
110056-1
E: OPERATION AND ADJUSTMENT INSTRUCTIONS
IF LIMITS ARE NOT ADJUSTED PROPERLY, THE EMERGENCY
RELEASE MECHANISM MAY NOT WORK PROPERLY AND DOOR
OPERATION COULD RESULT IN DOOR DAMAGE, SERIOUS
PERSONAL INJURY OR DEATH!
WARNING
16
