Chamberlain 7200 - Connect Door Arm to Trolley

lnstallation
Step
12
Connect
Door Arm
to
TrolleY
Follow
instructions
which apply
to
your
door
type
as
illustrated
below
and
on
page
27.
Make
sure
garage
door
is fully
closed.
Pull the
manual
release
handle
to
disconnect
the outer
trolley
from
the
inñer tiolley.
Slide
the
outer trolley
back
(away from the
door)
about
2"
as
shown in
Figures
1,2
and 3.
Figure
2:
.
Bring
arm
sections
together.
Find
two
pairs
of
holes
that line
up and
join
sections.
Select
holes
as
far
apart
as
possible
to
increase
door
arm
rigidity.
Figure
1:
.
Fasten
straight
door
arm
section
to
outer
trolley
with a clevis
pin.
Secure
the
connection
with
a ring
fastener.
.
Fasten
curved
section
to the
door
bracket
in the
same
way as
shown.
lnner
Trolley
Outer
TÍolley
Clev¡s
Ring
Fastener
o
Bracket
Skaight
Door Arm
Rope
Pin
Manual
Release
Handle
Door
Screws
5/1 6"- 1 8x7/8"
.%
Clevis Pin
Curved
Door Arm
Figure
1
Door
Bracket
Figure
2
@
8.
\
@
Lock
Washers
5/1 6"
Nuts
5/16'-'1
Hole
Alignment
Alternative
Figure
3:
.
lf holes
in curved
arm
are above
holes
in straight
arm,
disconnect
straight
arm.
Cut about
6"
from
the solid
end.
Reconnect
to trolley
with cut
end
down
as shown.
.
Bring arm
sections
together.
.
Find
two
pairs
of
holes
that
line up
and
join
with
screws,
lock
washers
and
nuts.
Hardware
Shown
Actual
Size
Nut 5/16"-18
Lock Washer
5/16"
Ring Faslener
Clevis
Pin
5116"x1"
Hex
Screw
5116"-18x7
18"
o
\
%
Screws
5/ 1 6"-1 8x7/8"
Cut This End
proceed
to Adjustment
Step
1,
page
28.
Trotley
will re-engage
automatically
when
the
opener
is operated'
Figure
3
'@.
@[
Lock
Washers
5/'16'
Nuts
5/1 6"-1
8
26
Nortek, Exhibit 1012