Attach Rail To Header Bracket - Chamberlain ML750 Installation And Operating Instructions Manual

14

ATTACH RAIL TO HEADER BRACKET

Position the opener on the garage floor below the header
bracket. Place packing material under the opener to protect
the cover. Raise rail until holes in the header sleeve and
holes in the header bracket align. Join with clevis pin (1).
Insert ring fasteners (2) to secure.
NOTE: To enable the rail to clear the sectional door
springs, it may be necessary to lift opener onto a
temporary support. The opener must either be secured
to a support or held firmly in place by another person.
15
POSITION THE OPENER
SECTIONAL DOOR OR TRACKED TILT
DOOR
You will need a 50mm piece of timber or similar
spacer to gauge the distance between door and rail.
1. Raise the opener up onto support.
2. Open the door completely, place a 50mm spacer
between the door and the rail (as shown).
3. If the top section or panel hits the trolley when you
raise the door, pull down on the trolley arm to
disengage the motor. Leave the trolley in this
position until motor is fastened in place.
ONE PIECE TILT DOOR (NON TRACKED)
You will need a 100mm (4") piece of timber or similar
spacer to gauge the distance between door and rail.
1. Raise the opener onto support.
2. Open the door completely, place a 100mm
spacer between the door and the rail (as shown).
3. The top of the door should be level with the top
of the motor. Do not position the opener more
than 50mm (2") above this point.
50mm (2")
Header
above the highest
Bracket
point of travel
Door
Door
A
50mm (2")
above the highest
point of travel
Door Header
Bracket
B
50mm spacer should
be used to determine
the correct mounting
position
Header
Bracket
200mm (8")
Door
above the highest
point of travel
C
100mm spacer should
be used to determine
the correct mounting
position
6
2
2
1
1
1
2
Rail
50mm spacer should
be used to determine
the correct mounting
position
Rail
Door
Rail
Door