12
Outward swinging gate:
If you are installing the 412 Operator to swing the gate
outward, construct a steel elbow of sufficient size to
attach to the gate pillar and rear mounting bracket (see
Figure 7 for elbow dimensions).
Attach the Operator to the Rear
Mounting Bracket
Attach the operator to the rear mounting bracket with
the long pin and one snap ring on the bottom (see
Figure 8).
Attach the Operator to the Front
Mounting Bracket
Attach the operator to the front mounting bracket with
the short pin and one snap ring on the bottom and one
snap ring on the top (see Figure 9).
Attach the Front Mounting Bracket
to the Gate Leaf
Disengage the operator’s worm screw drive from its
motor with the Manual Release. Insert the key in the
top of the motor assembly, and turn the key a half turn
in the direction of the gate’s closing.
You should be able to lengthen or shorten the cylinder
covering the operator’s worm screw by pulling or
pushing the cylinder. Lengthen or shorten the operator
to the required distance for your gate installation:
Inward swinging
: Lengthen the worm screw
completely and push the cylinder in one
inch.
Outward swinging
: Shorten the worm screw
completely and then pull the cylinder out
one inch.
With the gate in the fully closed position, temporarily
clamp the front mounting bracket (previously attached
to the operator) to the gate leaf and insure that the
cylinder of the worm screw is level.
Move the gate leaf by hand to the fully opened
position against the gate stop and insure that the
cylinder is level.
Axis of rotation
for gate leaf
Gate post
(or column)
Steel elbow
A
B
C
D
F
Centerline of gate leaf
E
Mounting Dimensions
a
90-deg Swing
110-deg Swing
A
5 3/4 in. (14.5 cm)
4 7/8 in. (12.5 cm)
B
5 3/4 in. (14.5 cm)
4 7/8 in. (12.5 cm)
WARNING! A and B should differ by no more than 1/2 in. Larger differences may
dangerously alter the speed of operation.
C
24 1/4 in. (62 cm)
D
4 in. (10 cm)
3 1/8 in. (8 cm)
E
Absolute minimum of 3 1/8 in. (8 cm)
F
Absolute minimum of 1 3/4 in. (4.5 cm)
a
Gate speed increases as the dimensions A and B decrease. The torque adjustment may also affect the
gate speed.
b
The sum of A and B must equal a minimum of 3 5/8 in. (9 cm).
Figure 7. Important mounting dimensions for outward-swinging 412 operators, top view
