Positioner Disassembly; Removing The Positioner From The Actuator - Emerson Fisher 3610J Instruction Manual

3610J and 3620J Positioners
September 2017
Figure 23. Schematic of Fisher 3620JP Positioner
MINOR LOOP
GAIN ADJ
38A6594‐A
B2149

Positioner Disassembly

Removing the Positioner from the Actuator

Refer to figure 28 or 29 for key number locations, unless otherwise indicated, while removing the positioner from the
actuator.
1. Unscrew the four socket head screws (key 54), and remove the positioner from the actuator or positioner adaptor
(key 113—the positioner adaptor is used only on selected actuator types and sizes).
2. Release all pressure to the positioner. Disconnect the supply, instrument, and output tubing.
WARNING!
If using gas as the supply medium, ensure adequate ventilation and remove any ignition sources.
3. Unscrew the four captive cover screws and remove the cover (key 41).
4. For the 3611JP or 3621JP mounted on a 585 or 585R, size 100 with a 51 through 102 mm (2 through 4 inch) travel
only, disconnect the extension spring (key 185) from the feedback lever.
5. Unscrew the four socket head screws (key 54), and remove the positioner from the actuator or positioner adapter
(key 113—the positioner adapter is used only on selected actuator types and sizes).
36
CROSS‐OVER
ADJ
RELAY
A
ZERO ADJ
SUMMING BEAM
FLAPPER
NOZZLE
FIXED
CAVITY A
RESTRICTION
CAVITY B
MAGNET
COIL 4 TO
SUPPLY
20 mA INPUT
END VIEW OF ROTARY SHAFT
RELAY BEAM
RELAY
B
RANGE SPRING
COARSE
SPAN
ADJ
COUNTER SPRING
PIVOT A
INPUT MODULE
FLAPPER
NOZZLE
FIXED
RESTRICTION
Instruction Manual
SUPPLY PRESSURE
NOZZLE PRESSURE
INPUT SIGNAL
OUTPUT SIGNAL
OUTPUT SIGNAL
AIR
SUPPLY
FINE
SPAN
ADJ
PIVOT
B
FEEDBACK
LEVER
POSITIONER
CAM
PISTON
ACTUATOR
D200149X012