IMO-553 EN
7
C. Hold the body (50) in a horizontal position by insert-
ing the top of the shaft in a vice, or inserting the bot-
tom of the shaft connection into a male drive fitted
into a vice as shown by (Figure 10).
D. Ensure that the octi-cam (1) is in the correct position
with respect to the stop screw holes as shown by
(Figure 11).
E. For standard-rotation assembly (clockwise to close)
rotate the body (50) 40 – 45° counterclockwise (if
viewing the bottom of the actuator), or clockwise (if
viewing the top of the actuator) as shown in (Figure
12).
F. Press the two pistons (40) simultaneously into the
body (50) until the piston racks are engaged and
rotate the body clockwise (if viewing the bottom of
the actuator), or counter-clockwise (if viewing the
top of the actuator), until the stroke is completed.
G. To ensure that the piston (40) teeth are evenly
engaged, fully compress both pistons (40) inward
and measure the distance from the edge of the body
to the piston (40) face on each side, shown as dimen-
sion “A” in (Figure 12). If a different value is obtained
on each side, remove the pistons and repeat from
step 2d.
H. Temporarily install the position indicator (19) onto
the shaft (60) to determine whether the correct
stroke is obtained, Verify that the slot in the top of
the position indicator (19) will rotate a minimum of
5° beyond the 90° vertical centerline of the actua-
tor body (50) and a minimum of 5° beyond the 0°
horizontal centerline of the actuator body as shown
in (Figure 13). If the proper stroke is not obtained,
remove the pistons and repeat from step 2d. Once
the proper stroke is verified, remove the position
indicator (19).
3. End Cap (30) and Spring Cartridge (17) Assembly,
(Figures 14 through 16):
A. For spring-return actuators, insert the proper quan-
tity of spring cartridges (17) according to the pattern
shown in (Figure 14) (referring to the total number
of springs).
A
A
40°- 45°
Figure 12
Spring to Close or Clockwise to
Close for Double Actin
Close for Double Acting
Octi
Bottom Square
Orientation
-Cam
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Bottom Square
Orientation
-Cam
Spring to Open or Counterclockwise
to Open for Double Acting
Octi
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Figure 11 (Looking from above)
5°
Figure 13
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