Emerson Fisher 1051 Instruction Manual page 22

1051 and 1052 Size 33 Actuators
June 2017
Figure 8. Fisher 1051 and 1052 Actuator Locking Mechanism
CAP SCREW
(KEY 21)
MOUNTING PLATE
ASSEMBLY (KEY 124)
COVER
(KEY 59)
PADLOCK
(CUSTOMER SUPPLIED)
24B0391‐A
A6226
To add the locking mechanism to an existing actuator, purchase the required parts from Emerson Automation
Solutions.
1. Remove cap screws, spring adjustor cover, and cover plate (keys 21 and 60, 85 or 117, and 59).
2. Thread jam nut (key 128) all the way onto the threaded bolt portion of the locking device before threading it into
the cover (key 59).
3. After the bolt is threaded into the cover, drive the groove pin (key 127) into the threaded bolt. So the locking
mechanism will not interfere with rotation of the lever (key 27), rotate the locking mechanism counterclockwise
until it is stopped by the groove pin (key 127). Attach the cover to the actuator with cap screws (key 60).
4. Attach mounting plate (key 123) with cap screws (key 21).
5. Be sure the diaphragm rod is retracted fully. This will be the locked position of the valve.
6. Screw the threaded bolt into the cover until it contacts the actuator lever.
7. Rotate the locking device slightly until the hole in the mounting plate (key 123) aligns with a hole in the locking
device.
8. Tighten the jam nut against the cover.
9. Insert the padlock (not furnished by Emerson Automation Solutions) to connect the mounting plate with the
locking device.
Operating the Locking Mechanism
To Unlock the Actuator
1. Remove the padlock. Loosen the jam nut (key 128), and unscrew the threaded bolt until it is stopped by the groove
pin (key 127) in the threaded bolt.
Note
For normal operation of the actuator, the threaded bolt must be unscrewed far enough that the actuator lever will not contact the
bolt in normal actuator operation.
22
MOUNTING PLATE
(KEY 123)
JAM NUT
(KEY 128)
CAP SCREW
GROOVE PIN
(KEY 60)
(KEY 127)
Instruction Manual
D101322X012