Chamberlain AccessMaster M885 - Install the Door Bracket

10
Installation
8 Install the Door Bracket
Fiberglass,aluminum or lightweightsteel garage doorsWILL REQUIRE reinforcement BEFORE
installation of door bracket. Contact the garage door manufacturer or installing dealer for opener
reinforcement instructions or reinforcement kit. Failure to reinforce the top section as required
according to the door manufacturer may void the door warranty.
A horizontal and vertical reinforcement is needed for
lightweight garage doors (fiberglass, aluminum,steel,doors
with glass panel,etc.) (notprovided). A horizontal
reinforcement brace should be long enough to be secured to
two or three vertical supports.A vertical reinforcement brace
should cover the height ofthe top panel. Contact the garage
door manufacturer or installing dealer for opener
reinforcement instructions or reinforcement kit.
NOTE: Many door reinforcement kits provide for direct attachment of the clevis pin and door arm. In this
case you will not need the door bracket; proceed to the next step.
SECTIONALDOORS
1. Center the door bracketon the previously marked vertical centerline used for the header
bracketinstallation. Note correctUP placement,as stamped inside the bracket.
2. Position the top edge of the bracket2"-4" (5-10 cm) below the top edge of the door, OR
directlybelow any structural support acrossthe top of the door.
3. Mark, drill holes and install asfollows, depending on your door’s construction:
Metal or light weight doors using a vertical angle iron brace between the doorpanel support and the
door bracket:
l
Drill 3/16" fastening holes.Secure the door bracketusing the two self threading screws.
(Figure1)
l
Alternately,use two 5/16" bolts,lock washers and nuts (not provided).(Figure2)
Metal, insulated or light weight factory reinforced doors:
l
Drill 3/16" fastening holes.Secure the door bracketusing the self-threading screws.(Figure3)
Wood Doors:
l
Use top and bottom or side to side door bracketholes. Drill 5/16” holes through the door and
secure bracketwith 5/16"-18x2" carriage bolts, lockwashers and nuts (not provided).
(Figure4)
NOTE: The 1/4"-14x5/8" self-threading screws are not intended for use on wood doors.
FIGURE 1
FIGURE 3
Vertical Reinforcement
Vertical Centerline
of Garage Door
UP
Door Bracket
Self-Threading Screw
1/4" - 14x 5/8"
Self-Threading
Screw
1/4" - 14x 5/8"
Vertical Centerline
of Garage Door
UP
FIGURE 4
Vertical
Centerline of
Garage Door
Bolt 5/16"-18x2"
(Not provided)
UP
Inside Edge of Door or
Reinforcement Board
FIGURE 2
Vertical Reinforcement
Bolt 5/16"-18x2"
(Not provided)
Lock Washer 5/16"
Nut 5/16"-18
Door Bracket
UP
Vertical Centerline
of Garage Door
Self-Threading Screw 1/4"-14x5/8"
HARDWARE