7 Servicing/Maintenance
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EA-C
7.2 Removing the actuator
a
b
c
d
e
f
g
h
i
EA-C 20 - 140
EA-C 200 - 250
Fig. 24:
Removing the actuators
a
Coupling
b
Coupling nut
c
Tensioning screw
d
Screwed insert
e
Pillar
f
Stem
g
Locknut
h
Top flange
5)
i
Pillar nut
ü
The power back-up unit of continuous-action actuators has been disconnected
separately.
1. Remove the actuator cover or the terminal box cover, depending on the
actuator. (
ð
Section 5.4, Page 16)
2. Disconnect the power cable and the control cable from the terminals.
3. Undo the pillar nuts (i).
4. For EA-C 20 to 140, loosen the tensioning screws (c). For EA-C 200 to 250, loosen
the screwed insert (d) with a pin-type face wrench.
5. Undo the locknut (g).
6. Tighten the coupling nut (b) with an open-ended wrench.
7. Use the handwheel to move the coupling (a) into its top starting position. If it
cannot be turned, loosen the 4 tensioning screws (c) or the screwed insert (d)
further, depending on the design.
8. Pull the actuator pillars (e) out of the drilled holes provided in the top flange
5)
(h) .
7.3 Maintenance/inspection
EA-C actuators are maintenance-free.
5)
Control valve flange for mounting the actuator