Cashco C27 - C53 Actuator User Manual

Page 6

IOM-C27-C53

F. Bushing & O-ring Replacement ATC only.

(Extension of IV. B. Steps 1 - 8.)

1. Remove diaphragm plate (8), spring plate

(9) and stem spacer (5).

2. Place matchmarks on lower case (2) to

mark location of the springs (10). Remove
springs (10).

3. Grasp stem (6) with hand and pull down thru

attachment hub (4). Remove o-ring (17)
from stem (6). Lubricate new o-ring (17)
with Lubri-plate or equivalent and install on
stem (6).

4. From the top of the attachment hub (4)

extract the stem bushing (39). Install new
bushing.

5. Grasp stem (6) with hand and from below

the lower case (2) push the stem back up
thru the attachment hub (4) until the bottom
end of the stem aligns with the “O” open
mark on the indicator plate (23).

6. Reset springs (10) equally spaced around

the lower case (2). See Step 2 previous for
matchmarks.

7. Place stem spacer (5) on top of stem (6).

Carefully position the spring plate (9) over
the tops of the springs and spacer. Make
sure the springs, spacer and spring plate are
properly engaged.

8. Carefully set the diaphragm plate (8) on top

of the spring plate (9).

9. Return to Section IV. B. Step 9.