4-20
(b) Reverse action type
(1) Disconnect the air piping and detach other external items from the actuator.
(2) Remove the stem connector, pointer and lock nut. (See Figure 4-21.)
(3) Remove the clamping-bolts (except the pair of eyebolts) of the diaphragm case.
(4) Loosen evenly and alternately the pair of eyebolts. (The initial setting of the springs is
done by these eyebolts.)
(5) Remove the diaphragm case. Take out the springs.
(6) Pull out upward the actuator rod together with the diaphragm.
Figure 4-16 Actuator model HA2R or
HA3R
Figure 4-17 Actuator model HA4R
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