30
1/2 HP Chain Drive Garage Door Opener
Adj ust Range of Motion
To avoid
injury
or
death
:
- Be sure correctly adjust the door range of motion. Failure to correctly adjust the door range of motion may result
in malfunction of the emergency reverse system, which can result in damage to property, personal injury and
death.
- Do not stand under the garage door opener when adjusting the door range of motion.
If adjustments are needed, follow the adjustment procedures outlined below:
Check each of the following:
1. If the door does not open completely, increase the "up travel" distance by rotating the adjusting screw
clockwise. Locate the two adjustments on the bottom center of the motor housing:
Use a flathead screwdriver to make limit adjustments. Turn the UP limit adjustment screw clockwise as
needed. One full turn equals 2” of travel. Run the opener through a complete travel cycle after each
adjustment and repeat as needed to fine tune the range of motion.
2. If the door does not close completely, increase "down travel" distance. Turn the down limit adjustment
screw counterclockwise. . Locate the two adjustments on the bottom center of the motor housing:
Use a flat head screwdriver to make limit adjustments. Turn the DOWN limit adjustment screw clockwise
as needed. One full turn equals 2” of travel. Run the opener through a complete travel cycle after each
adjustment and repeat as needed to fine tune the range of motion.
3. If the opener reverses when it reaches its fully closed position, decrease down travel by adjusting the
downward travel limit screw clockwise.
4. If the door reverses when closing and there is no visible interference to the travel cycle, check the door
for binding. Pull the trolley emergency release handle and manually open and close the door. If the door
is binding or unbalanced, call a trained garage door technician. If the door is not binding or unbalanced,
adjust the Down force. See next section: