Maintenance - Emerson Fisher 3610J Instruction Manual

3610J and 3620J Positioners
September 2017
Figure 21. Schematic of Fisher 3611JP Positioner
MINOR LOOP
GAIN ADJ
38A8902‐B
B1846‐1

Maintenance

Positioner parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of
inspection and replacement depends upon the severity of service conditions. The following procedure describes
disassembly and reassembly of the positioner. When inspection or repairs are required, disassemble only those parts
necessary to accomplish the task. When reassembly is complete, make adjustments as described in the Calibration
section.
WARNING
Avoid personal injury or property damage from sudden release of process pressure. Before performing any maintenance
operations:
D Always wear protective clothing, gloves, and eyewear when performing any maintenance operations to avoid personal
injury.
34
CROSS‐OVER
ADJ
RELAY
A
ZERO ADJ
SUMMING BEAM
FLAPPER
NOZZLE
CAVITY A
CAVITY B
INPUT SIGNAL
AIR SUPPLY
PRESSURE
FIXED
RESTRICTION
RELAY BEAM
RELAY
B
AIR SUPPLY
RANGE SPRING
COARSE
SPAN
ADJ
PIVOT A
INPUT MODULE
PIVOT B
FEEDBACK
LEVER
Instruction Manual
SUPPLY PRESSURE
NOZZLE PRESSURE
INPUT SIGNAL
OUTPUT SIGNAL
OUTPUT SIGNAL
FINE
SPAN
ADJ
COUNTER SPRING
PISTON
ACTUATOR
D200149X012