Install Instructions

Actuator Literature—D-3153 with Auxiliary Mounting Bracket Installation Bulletin 3
2
1
(
25
)
90°
1
2-3/4
(
70
)
De
g
ree Marks
Standard Swivel
Ball Joint Locations
B
C
D
E
90°
A
Figure 3: Crank Arm Detail
Note: The part of the crank arm that fastens over the
shaft is marked in 1/2 inch increments, and
one side of the arm is marked in 1/4 inch
increments in order to facilitate crank arm
adjustments.
To minimize axis angles for best operation and
maximum thrust, or to reach a more remote mounting
location, up to 4 feet (122 cm) of 5/16 inch rod stock
(D-3153-102) may be substituted as required. The rod
must be ordered separately and cut to the required
length.
Drive Shaft Linkage
1. Determine whether clockwise or counterclockwise
damper shaft rotation is required.
2. Slide the crank arm onto the blade shaft.
3. Align the linkage point for 90° rotation at a 3 inch
(76 mm) stroke. Try to maintain the factory
settings for the crank arm (2-1/8 inch radius or
point “D” on the crank arm) and the piston rod
length. The correct line of action goes through the
start and end points of rotation.
4. Finger tighten the crank arm set screws and make
sure that the actuator is in a level position.
Clearance
for 1/4 inch
Screws
1-1/4
(
32
)
2-1/2
(
64
)
4
(
102
)
1/2
(
13
)
Figure 4: Auxiliary Mounting Bracket, inches (mm)
5. If there are no adjustments necessary, mark the
four mounting holes using the auxiliary bracket as
a template and swing the actuator and mounting
bracket aside.
If adjustment is required:
●
Loosen the piston rod extension set screw.
●
Telescope the piston rod to allow attachment
to the swivel ball joint; the crank arm and
swivel ball joint assembly should be positioned
on the damper shaft extension to allow the
damper blades to be in their normal position
when the actuator is fully retracted.
●
Tighten the crank arm, swivel ball joint, and
piston rod set screws before making the
air line connections.
6. Make sure that the mounting surface is solid and
stable (that it can retain thread-forming screws).
7. Drill a 3/16 inch (5 mm) hole at each of the marked
places and mount the auxiliary bracket using
four No. 12 x 1/2 inch pan-head, thread-forming
screws supplied.
8. Tighten the crank arm set screws and check all
other linkage fasteners before making air line
connections.
Direct Blade Linkage
1. Remove the swivel ball joint from the crank arm.
2. Determine whether normally open or normally
closed damper operation is desired and either
select or fabricate a blade arm (leaf connection).
The swivel ball joint on the end of the piston rod is
adaptable.
90°
Rotation
45°
1-1/2
(
38
)
2-1/8
(
54
)
Radius
Figure 5: Normally Closed Location
For normally closed operation, form an angle
of 45°.