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DISASSEMBLY
Actuator spring is not contained. Although preload force is low, caution
must be used when spring force is released. Hand pressure must be
applied to the cylinder top restricting its travel. Completely remove the
actuator from the valve and follow the steps below.
1
Insert four bolts into bonnet and clamp into vise as illustrated in
Figure 2
2.
Remove air coupler adapter and nut by turning
counterclockwise.
3
Remove actuator cylinder from bonnet by applying a strap
wrench to the cylinder and turn counter clockwise
completely two times.
MAINTENANCE
Figure 2
Figure 1
CAUTION
To prevent injury, apply constant
hand pressure and unscrew
completely. Spring force will push
the cylinder up when threads
disengage. See Figure 2.
4
Pull cylinder assembly off the bonnet and remove spring.
5
Separate diaphragm assembly from cylinder by holding
cylinder and pulling on actuator stem.
6
Place diaphragm assembly into a vise and secure Inner
Diaphragm Guide as illustrated in Figure 3. Do Not over
tighten. Remove stem by locating a wrench around the flats
and turn counter clockwise. Remove adapter and nut. The
nut may be removed by inserting a punch into the hole in its
face, and tapping nut counter clockwise .
7
Remove diaphragm assembly from vise and separate.
Figure 3
Hole
Apply constant
hand pressure
when unscrewing.
Содержание 741 Series
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