4-19
4-5. Disassembly and assembly of model HA2, HA3, or HA4 actuator
Disassembly procedure
(a) Direct action type
(1) Disconnect the air piping and detach the accessories 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. Pull out upward the actuator rod together with the
diaphragm.
(6) Take out the springs.
Figure 4-14 Actuator model HA2D or
HA3D
Figure 4-15 Actuator model HA4D
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