Samson 3276-D, Mounting And Operating Instructions

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EB 8318 EN 8-7
Servicing
− It loads the spring (see 'Setting the actua-
tor' in the 'Installation' section).
25. 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 the assembly to-
gether 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).
6. Lift off the top diaphragm case (850).
7. 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.
8. Remove the retaining ring (918) and
then the bushing (903) including the
O-rings (924, 925).
9. Pull the diaphragm plate assembly con-
sisting of the diaphragm plate assembly
out of the bottom diaphragm case (900).
10. 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.
11. Unscrew the two screws (915) opposite
each other on the bottom diaphragm
case (900) and replace them with longer
screws, which stick out of the actuator
housing (40) by approx. 50 mm.
12. Unscrew the remaining short screws
(915).
13. Gradually unthread the two longer
screws that you have just inserted in a
crisscross pattern to safely relieve any
possible compression of the spring (595).
14. Lift off the bottom diaphragm case (850)
from the housing (40).
15. Remove seal (926) and yoke flange
(905) from the housing (40).
16. Renew the seal (926).
17. Replace the seals on the screws (915).
Apply silicone to the screws and insert
them into the bottom diaphragm case
(900) and housing (40). Tighten the
screws (915) in a crisscross pattern. Ob-
serve tightening torques.
18. Unscrew the screw (914) from the actua-
tor stem (61).
19. Take the diaphragm plate (901), dia-
phragm (911) and diaphragm holder
(902) (removing the silicone) off the actu-
ator stem (61).
20. Clean all parts that have been removed.
21. Insert the actuator stem (61) into the bot-
tom diaphragm case (900).
22. Renew O-rings (924, 925).