Fisher 1052PSV Instruction Manual page 16

1052PSV Actuator
May 2011
Figure 11. Lower Casing Travel Stop Orientation
CAUTION
When removing the actuator from the valve, do not use a hammer or similar tool to drive the lever (key 27) off the valve
shaft. Driving the lever could damage internal valve parts. On some valve types, driving the lever off the shaft could move
the valve disc or ball and bearings away from the centered position, causing subsequent damage to valve parts as the valve
is operated.
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.
WARNING
To avoid personal injury from pre‐compressed spring force suddenly thrusting the upper diaphragm casing (key 1) away
from the actuator, relieve 1052PSV spring compression before proceeding further.
9. To relieve spring compression, use the special 2-1/2 inch wrench to rotate the spring adjustor (key 74), and move it
away from the actuator casings. Continue rotating the spring adjustor until spring compression is completely
removed.
10. Unscrew and remove the cap screws, washers, and hex nuts (keys 5, 26, and 6), and then remove the upper
diaphragm casing and the diaphragm (key 3).
11. To remove the diaphragm plate (key 4), remove the rod end bearing (key 17), the lower locknut (key 16),
turnbuckle (key 57), and the left hand threaded upper locknut (key 58) from the diaphragm rod (key 10).
12. Pull the diaphragm plate (key 4) and attached parts out of the actuator. Then remove the cap screw (key 9) to
separate the diaphragm plate and the diaphragm rod.
13. Remove the actuator springs (keys 11 and 12) from the actuator. Then remove the lower spring seat (key 13),
thrust bearing and bearing races (keys 71 and 72), and thrust collar (key 73).
14. If replacing the spring adjustor (key 74), rotate it away from the casing (keys 1 and 2) until disengaged.
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