Ryobi GD125 Operator's Manual page 20

WARNING:
Many of the steps described in this INSTALLATION
section require the use of a ladder. Use extreme care
when standing on a ladder. Ensure someone is holding
the ladder on the ground to keep it stable. Failure to
safely use a ladder can cause a fall and result in death
or serious personal injury.
CHECK THE CONDITION OF THE DOOR AND
IDENTIFY THE SPRING TYPE
See Figure 26 - 28.
WARNING:
If the garage door does not move smoothly, binds, or is
out of balance, have it repaired or replaced by a qualified
service person. An unbalanced or damaged garage door
may not reverse on command, which can result in death
or serious personal injury.
NOTICE:
The garage door opener may not function as intended if
installed onto an unbalanced garage door.
 Remove any ropes attached to the garage door.
 Disable any and all door locks.
 Raise and lower the door to ensure it moves smoothly.
 Check the balance of the door. Raise the door until it is
half open and release it. If properly balanced, the door
will remain in this position without moving.
NOTE: For single-panel garage doors, balance can be
checked at two additional positions. Raise the door until it
is nearly in the fully open position (about shoulder height)
and release it. If properly balanced, the door should
move to the fully open position. Lower the door until it
is nearly in the fully closed position (about knee height).
If properly balanced, the door should move to the fully
closed position.
 If the door does not move smoothly, binds, or is out of
balance, this could indicate a problem with the door, door
springs (torsion spring and/or extension spring), or door
spring components. Have the garage door or door springs
repaired by a qualified service person before installing the
garage door opener.
INSTALLATION
Half-Open
Single-Panel
20 - English
Half-Open
Position
Sectional
Door
Position
Door
Torsion Spring
Fig. 26
Fig. 27
Extension Spring
Fig. 28