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b) Reversal of the direction of
action from stem retracts to
stem extends for 120 cm² ac-
tuator area
1. Lift off the top diaphragm case (A16).
2. Pull the actuator stem (A3) together with
the diaphragm plate (A14), diaphragm
(A18) and diaphragm plate (A13) out of
the bottom diaphragm case (A2).
3. Remove the springs (A10).
4. Unscrew the collar nut (A26).
5. Remove the diaphragm plate (A14), dia-
phragm (A18) and diaphragm plate
(A13) from the actuator stem (A3) and
place them back on again in the reverse
order.
6. Tighten the collar nut (A26). Observe
tightening torques.
7. Apply a suitable lubricant to the actuator
stem (A3).
8. Place the actuator stem (A3) together
with the diaphragm plate (A14), dia-
phragm (A18) and diaphragm plate
(A13) in the bottom diaphragm case
(A2). Make sure that the radial shaft seal
(A40) is not damaged.
9. Place the springs (A10) in the bottom di-
aphragm case (A2), centering them in
the intended recesses.
10. Place on the top diaphragm case (A16).
11. If necessary, preload the springs (see the
'Start-up' section).
EB 8317 EN
12. Fasten the top and bottom diaphragm
cases (A16, A2) together using the nuts
(A24) and bolts (A22). Observe tighten-
ing torques.
The actuator springs, which now push
against the diaphragm plate from above,
cause the actuator stem to extend. The
signal pressure is connected to the bot-
tom connection (S) on the bottom dia-
phragm case. As a result, the actuator
stem retracts opposing the spring force
as the signal pressure increases.
13. Affix a new nameplate with changed
symbol and new configuration ID to the
actuator.
9.6 Ordering spare parts and
operating supplies
Contact your nearest SAMSON subsidiary
or SAMSON's After-sales Service for infor-
mation on spare parts, lubricants and tools.
Spare parts
See Annex for details on spare parts.
Lubricant
See document u AB 0100 for details on
suitable lubricants.
Tools
See document u AB 0100 for details on
suitable tools.
Servicing and conversion
9-9
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