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1051 & 1052 F & G Actuators
styles A and D to styles B and C or vice versa or to
change the mounting position.
WARNING
To avoid personal injury, perform the
steps in the WARNING at the
beginning of the Maintenance section
to isolate the control valve and
actuator.
1. Remove the tubing or piping from the top of the
actuator.
2. Remove the cover (key 33) by unscrewing and
removing the cap screws and washers (keys 34
and 63).
3. Unscrew cap screw (key 18). Loosen cap screw
(key 28).
CAUTION
When removing the actuator from the
valve body, do not use a hammer or
similar tool to drive the lever (key 27)
or actuator off the valve shaft. Driving
the lever or actuator could damage
internal valve parts. On some valve
types, driving the lever (key 27) could
move the valve disc and bearings
away from the centered position
causing subsequent damage to valve
parts.
A wheel puller may be used to remove
the lever. It is okay to tap the wheel
puller screw lightly to loosen the lever,
but hitting the screw with excessive
force could also damage valve parts or
disrupt the centered position of the
valve disc and bearings.
4. If changing styles,
D Unscrew cap screws (key 23), and remove the
actuator housing (key 20) from the mounting yoke
(key 22).
D Rotate the housing 180 degrees, maintaining
the appropriate position (1, 2, 3, or 4), and place the
actuator onto the mounting yoke (key 22).
5. If changing positions, unscrew cap screws
(key 23), and rotate the actuator housing to the
desired position.
14
6. Secure actuator housing (key 20) to the mounting
yoke (key 22) with cap screws (key 23). Consult
table 3 for appropriate bolt torques.
7. Consult the appropriate valve instruction manual
for lever/valve shaft orientation marks, and slide the
lever (key 27) into place; see figure 4 for correct
lever operating clearance. Clamp with the cap screw
(key 28).
8. Rotate the lever (key 27) to align with the rod end
bearing (key 17). This connection can be aided by
stroking the actuator off its up travel stop with a
regulated air source.
9. Apply sealant (key 77) or equivalent
thread-locking compound to the threads of the cap
screw (key 18).
10. Connect the lever (key 27) and the rod end
bearing (key 17) with the cap screw and hex nut
(keys 18 and 19). Tighten cap screw to the
recommended bolt torque shown in table 3. This
connection can be aided by stroking the actuator
from its up travel stop with a regulated air source.
11. Note the valve position and direction of rotation.
Position the travel indicator (key 37) accordingly.
Replace the cover (key 33), and secure it with cap
screws and washers (keys 34 and 63).
D If the holes in the cover and housing (key 20)
do not align, use a regulated air source to move the
actuator slightly off the up travel stop.
D If hole alignment cannot be obtained in this
manner, temporarily loosen cap screws (key 23) and
shift the housing slightly.
CAUTION
To avoid parts damage, do not stroke
the actuator while cover (key 33) is off.
12. Follow the instructions given in the Turnbuckle
Adjustment section.
Top-Mounted Handwheels and
Adjustable Travel Stops
Principle of Operation for Handwheels
If repeated or daily manual operation is
expected or desired, the unit should
Instruction Manual
Form 5062
May 2008
Note
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