Attach Rail To Header Bracket; Position Opener For Mounting - Genie M-4500 Owner's Manual

8-5. ATTACH RAIL TO HEADER BRACKET

I Support opener head slightly off the floor.
I Lift the opposite end of the rail up to the header bracket.
I Position rail end-stop within the openings in the header
bracket. Insert header clevis pin ( 1/4" dia.) through rail
end-stop and header bracket, then attach cotter ring to
end of pin. (See Fig. 19A)

8-6. POSITION OPENER FOR MOUNTING

I Once rail is attached to header bracket, support opener
powerhead on ladder, or use the assistance of another
person to support opener powerhead high enough so
door can open without hitting the rail.
A. SECTIONAL DOORS AND ONE-PIECE
DOORS WITH TRACK:
I Open garage door to fully opened position, and place a
2x4 laid flat between the door and the rail. See Fig.20.
I The 2x4 provides an easy method of ensuring the
correct mounting height of the opener.
B. ONE-PIECE DOORS WITHOUT TRACK:
I Disconnect trolley by pulling down on emergency release
knob. Move trolley toward opener head.
I Open door all the way so that it is parallel to the floor,
or slightly tilted toward the front of the garage. DOOR
SHOULD NOT BE TILTED TOWARD THE BACK OF GARAGE.
I Position opener so that top of opener head is level with
top of opened door.
I To check for correct mounting height, temporarily position
curved door arm as if connecting to door bracket. See Fig.
21. The long side of the arm should be parallel to the
floor when door is fully opened. Raise or lower power-
head so that arm will be parallel to floor.
I Temporarily support head at this height, and prepare to
mount the opener to ceiling.
Fig. 19
Opener Box
Fig. 20
Door
Fig. 21
Door
Fig. 19A
Header Bracket
Rail End-Stop
Cotter Ring
2x4 Laid Flat
Stepladder
Stepladder
1/4 x 3-1/4"
Clevis Pin
Rail
11