Removing The Positioner From The Actuator; Center-Bolt Mounting On The Type 1250; 1250R, 3024S And Baumann Actuators; Clamp Mounting On The Type 1250, 1250R And 3024S Actuators - Emerson Fisher 3660 Instruction Manual

3660 and 3661 Positioners
Removing the Positioner from the
Actuator
WARNING
Refer to the Maintenance WARNING at
the beginning of this section.
Center-Bolt Mounting on Type 1250,
1250R, 3024S, and Baumann Actuators
Refer to figure 24 or 25 for key number locations
unless otherwise indicated.
WARNING
To avoid personal injury caused by
electrical shock, disconnect electrical
power to the Type 3661 positioners.
1. Release all pressure from the positioner.
Disconnect the supply, instrument, and output
tubing. For Type 3661 positioners, disconnect the
input wires and conduit.
2. Unscrew the two captive cover screws and
remove the cover (keys 24 and 21). Loosen the
retaining screw (key 19P).
3. Pull the feedback lever assembly (key 19) out
slightly to release the range spring tension, and
remove the range spring (key 30).
4. Loosen and remove the hex head screw and
sealing washer (keys 72 and 71 in figure 3), and
remove the positioner.
5. To mount the positioner on the actuator, refer to
the Positioner Mounting section of this manual.
Clamp Mounting on Type 1250, 1250R,
and 3024S Actuators
WARNING
To avoid personal injury caused by
electrical shock, disconnect electrical
power to Type 3661 Positioners.
1. Release all pressure from the positioner.
Disconnect the supply, instrument, and output
tubing. For Type 3661 positioners, disconnect the
input wires and conduit.
26
2. Unscrew and remove the hex nut and washer
(keys 66 and 67 in figure 3), and remove the
positioner.
3. To mount the positioner on the actuator, refer to
the Positioner Mounting section.
Mounting Bracket/U-Bolt Mounting on
Type 657, and 667 Actuators
Refer to figure 24 or 25 for key number locations
unless otherwise indicated.
1. Release all pressure from the positioner.
Disconnect the supply, instrument, and output
tubing. For Type 3661 positioners, disconnect the
input wires and conduit.
2. Unscrew the two captive cover screws and
remove the cover (keys 24 and 21). Loosen the
retaining screw (key 19P).
3. Pull the feedback lever assembly (key 19) out
slightly to release the range spring tension, and
remove the range spring (key 30).
4. Loosen and remove the hex nut and washer
(keys 90 and 89, figure 7), and remove the
positioner.
5. To mount the positioner on the actuator, refer to
the Positioner Mounting section.
Changing the Input Module Diaphragm
Assembly
WARNING
Refer to the Maintenance WARNING at
the beginning of this section.
Refer to figure 24 or 25 for key number locations.
1. Unscrew the two captive cover screws, and
remove the cover (key 21). Loosen the retaining
screw (key 19P) and pull the feedback lever
assembly (key 19) out slightly to release the range
spring (key 30) tension.
2. Remove the cheese head screw (key 7) from the
beam and diaphragm assembly (key 28).
3. There are four cheese head screws (key 7)
holding the diaphragm assembly (key 28) to the
housing. Remove the two cheese head screws
(key 7) nearest the feedback lever assembly
(key 19) and loosen the two remaining cheese head
screws (key 7). Slide the diaphragm assembly
(key 28) out from between the lever assembly
(key 17) and the housing.
Instruction Manual
Form 5265
March 2006