Ryobi GD125 Manual Del Operador página 21

WARNING:
Never attempt to loosen, adjust, or remove the door
springs (torsion spring and/or extension spring), door
spring components, or any surfaces to which these items
are secured. These items are under extreme tension and
any such alteration could result in death, serious personal
injury, or property damage.
 If the door moves smoothly and is balanced, you may
begin installing the garage door opener.
INSTALLING THE HEADER BRACKET
See Figures 29 - 31.
WARNING:
To avoid serious personal injury, attach header bracket to
sound structural support on header wall. NEVER install
the header bracket onto weak surfaces such as drywall
that can cause the header bracket to fall.
WARNING:
ALWAYS use lag screws and concrete anchors (not
included) when installing the header bracket or 2x4 into
concrete, brick, or other masonry. Failure to properly
install the header bracket and associated hardware can
result in a falling object hazard and result in death or
serious personal injury.
WARNING:
Only install screws, bolts, anchors, and other hardware
into sound structural supports in areas where no electrical
wires, utility cables, pipes, or other obstructions are
located. Contact your local utility company or a qualified
electrician if you are unsure. Ensure all hardware
components are securely installed to prevent falling
objects. Failure to follow these instructions can result in
death, electrical shock, or other serious personal injury.
INSTALLATION
Always install the header bracket onto a sturdy surface. The
force required to raise and lower the garage door could pull
the bracket and mounting hardware out of weak surfaces
such as drywall. For some installations, it may be neccesary
to create a suitable location for the bracket by installing a 2x4
board. The 2x4 board can be installed between two studs
or into masonry using lag screws and concrete anchors (not
supplied).
 Locate the following items:
Header Bracket
Lag Screw (1/2 in. x 1-1/2 in.) [2]
To install the bracket to the header wall:
 Lower the garage door completely.
 Using a pencil and a level, draw a vertical line in the center
of the top portion of the garage door.
 Continue drawing the center line from the door to the
header wall. Extend the line to about a foot above the
garage door or as far as possible.
21 - English
Horizontal
Line
Center
Line
2x4
Level
Fig. 29