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Servicing
b) Type 3276-R (actuator stem
extends)
Version without handwheel and version
with side-mounted handwheel
1. Unscrew the spring adjuster (906) and
remove it from the actuator stem (61).
2. Lift off the top diaphragm case (850).
3. Pull the diaphragm plate assembly con-
sisting of the diaphragm plate (901),
screw (914), actuator stem (61), dia-
phragm (911) and diaphragm holder
(902) into the top position.
4. Remove the retaining ring (918) and
then the bushing (903) including the
O-rings (924, 925).
5. Pull the diaphragm plate assembly con-
sisting of the diaphragm plate assembly
out of the bottom diaphragm case (900).
6. Firmly clamp the actuator stem (61) in
the area above the thread for the spring
adjuster into a vise using protective jaws.
Make sure that the actuator stem is not
damaged.
7. Unscrew the screw (914) from the actua-
tor stem (61).
8. Take the diaphragm plate (901), dia-
phragm (911) and diaphragm holder
(902) (removing the silicone) off the actu-
ator stem (61).
9. Clean the parts and renew the dia-
phragm.
10. Insert the actuator stem (61) into the bot-
tom diaphragm case (900).
8-4
11. Mount the bushing (903) including the
O-rings (924, 925) and the retaining
ring (918).
12. Place the parts on the actuator stem in
the specified order:
− Diaphragm holder (902) with silicone
− New diaphragm (911)
− Diaphragm plate (901)
13. Use the screw (914) to fasten the parts
onto the actuator stem (61). Observe
tightening torque.
14. Apply a suitable lubricant to the spring
adjuster (906).
15. Thread the spring adjuster (906) onto the
actuator stem (61) and into the actuator
housing (40) to the point at which it rests
on the spring plate (904).
16. Place on the top diaphragm case (850)
and fasten it to the bottom diaphragm
case (900) using the nuts (917), bolts
(916) and washers. Observe tightening
torques.
Version with top-mounted handwheel
1. Unscrew the spring adjuster (906) and
remove it from the actuator stem (61).
2. Unthread the screws (836) from the
handwheel cap (825) and remove it.
3. Undo the nuts (942) from the handwheel
drive (825) and remove them together
with all the washers (557).
4. Unscrew the nuts (1030) from the hand-
wheel housing (940) and remove the top
handwheel assembly.
5. Remove the anti-rotation fixture (1027).
EB 8318 EN
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