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3610J and 3620J Positioners
Disassembling the 3622
Electro-Pneumatic Converter
Refer to figure 30 for key number locations while
disassembling the converter.
To check the operation of the
electro-pneumatic converter, remove
the pipe plug nearest the converter
(key 37, figure 30), and connect a
pressure gauge. Provide a 1.4 bar (20
psig) supply pressure to the
positioner. For a 4-milliampere DC
input signal, the pressure gauge
should read 0.17 to 0.23 bar (2.5 to 3.5
psig). For a 20-milliampere DC input
signal, the pressure gauge should read
0.96 to 1.07 bar (14.0 to 15.5 psig).
1. Turn off electrical power to the converter.
Release all supply pressure from the positioner.
2. Remove the cap (key 20), and disconnect the
field wiring from the terminal block.
a. If a grounding wire is used inside the housing
compartment, disconnect the wire from the
interior housing ground screw (key 31).
b. If an exterior grounding wire is used,
disconnect the grounding wire from the external
ground screw (key 31).
3. To remove the converter module, remove the two
screws (key 30) and pull the module out of the
housing. Inspect the O-ring (key 26) and replace it, if
necessary.
a. If removing the 3622 electro-pneumatic
converter assembly from the pneumatic
positioner, continue with steps 4 through 6. Or,
b. If replacing the converter module only, obtain
a replacement converter module and refer to the
Assembling the 3622 Electro-pneumatic
Converter procedure. If replacing the converter
module, calibrate the pneumatic portion of the
positioner by performing the Calibration
procedures after module replacement. There is
no converter module calibration.
4. Disconnect the supply tubing, output tubing, and
conduit from the converter.
5. If the optional 67CFR filter regulator is used,
remove the two screws (key 89, figure 27), and
remove the filter regulator from the converter
32
Note
assembly. Inspect the O-ring (key 190, figure 27)
and replace if necessary. Apply lubricant (key 17) to
the O-ring before replacement.
6. Remove the two socket head screws (key 35)
and remove the converter from the positioner case
(key 115A, figure 25). Inspect the four O-rings (key
36) and replace them if necessary. Apply lubricant
(key 17) to the O-rings before replacement.
Disassembling the Feedback Lever
Assembly
Refer to figure 28 for key number locations, unless
otherwise indicated, while disassembling the
feedback lever assembly.
For 1051, 1052, 1061, 585, 585R, 585C, and 585CR
actuators:
1. Remove the range spring (key 150, figure 25).
2. Turn the positioner over and unscrew the four
machine screws (key 43) and remove the feedback
lever assembly (key 117 or 170) from the positioner.
3. Remove the range spring hanger (key 130,
figure 25) and the span adjustment screw (key 128,
figure 25) from the feedback lever assembly
(key 117 or 170) by removing the retaining ring
(key 129, figure 25) and threading the span
adjustment screw out of the spring hanger.
4. Remove the E-ring (key 61) and separate the
pillow blocks (key 35), the spring (key 70), the
spacer (key 149) and the mandrel (key 148) from the
feedback lever assembly. For 3610J, 3610JP,
3620J, and 3620JP positioners only, unscrew the
hex nut (key 60) and remove the follower post (key
38) and roller (key 39).
5. Press out the two flange bearings (key 37) from
the pillow blocks (key 35). Inspect them for wear and
replace if necessary.
Disassembling the Reversing Plate and
Gasket
Refer to figure 25 for key number locations. Remove
the reversing plate screw (key 49), the reversing
plate (key 23), and the gasket (key 24). Inspect the
gasket, and replace if necessary.
When installing the gasket (key 24),
ensure it is not reversed. Install the
gasket so the slot in the case
assembly (key 115A) aligns with one of
the three holes in the gasket (key 24).
Disassembling the Relay
During the following relay disassembly procedures,
refer to figure 25 for key number locations.
Instruction Manual
June 2008
Note
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