Wayne 3018 - Manual (Page 28)

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Adjustment # 2 Contact Obstruction Sensing (Closing Direction)
The opener is designed to automatically reverse the door during closing travel whenever it comes in contact with an object
up to the last 1 inch of travel above the floor. An object on the floor with a height less than 1” will cause the door to stop.
(Test according to instructions on Step 27.)
If opener reverses properly with a 1” high solid test object laid flat on garage floor (Step 27) and stops without the solid
test object in the fully closed position, proceed to Adjustment # 3.
When door comes in contact with a 1” high solid test object laid flat on garage floor and stops instead of reversing, reset
the door close limits according to instruction in Step 27, adjusting until door reverses upon contact with the 1” high solid
test object.
If door reverses when it comes in contact with the floor, reset the door close limits according to instruction in Step 27.
Adjustment # 3 Positive Mechanical Door Lock
The garage door opener is designed with an
automatic mechanical locking system. This lock
secures the door in the fully closed position.
To adjust, activate the door opener and allow the
door to go to its fully closed position. Loosen the
two screws on the rail stop and move it behind the
chain latch assembly with a gap of 3/4” between
“stop” and “latch”. Retighten screws.