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3610J and 3620J Positioners
(key 36) and any other components which were
disassembled or disconnected.
10. If the converter module was replaced, calibrate
the pneumatic portion of the positioner by performing
the procedures in the Calibration section. There is
no converter module calibration.
Assembling the Feedback Lever
Assembly
Refer to figure 28 for key number locations while
assembling the feedback lever assembly.
1. Press the two flange bearings (key 37) into the
pillow blocks (key 35) if removed.
2. Assemble the mandrel (key 148), the spacer
(key 149), the spring (key 70), and the pillow blocks
(key 35) onto the feedback lever assembly (key 117)
and install the E-ring (key 61). For 3610J, 3610JP,
3620J, and 3620JP positioners only, assemble the
roller (key 39) and follower post (key 38) onto the
feedback lever assembly and tighten the hex nut
(key 60).
3. If the span adjustment screw (key 128, figure 25)
was disassembled, lightly coat the threads with
lubricant (key 153) and insert the span adjustment
screw into the feedback lever assembly (key 117)
and thread into the spring hanger (key 130,
figure 25). Ensure the tip of the span adjustment
screw is in the guide hole and install the retaining
ring (key 129, figure 25).
4. Assemble the feedback lever assembly (key 117)
onto the positioner case (key 115A, figure 25) by
attaching the pillow blocks (key 35) with the four
machine screws (key 43).
5. Turn the positioner over and install the range
spring (key 150, figure 25). Refer to tables 8 through
11 and figure 15 for the correct summing beam hole
number.
Assembling the Bypass Valve Assembly
Refer to figure 26 for key number locations while
assembling the bypass valve assembly.
1. If the gauge block (key 158) is removed, perform
the Assembling the Gauge Block procedure.
2. Assemble the adaptor gasket (key 164) and
bypass body adaptor (key 162) onto the gauge block
(key 158) and tighten the two socket head screws
(key 54).
3. Apply lubricant (key 153) to the O-rings
(keys 159, 167, and 168) sparingly and install the
O-rings on the bypass lever assembly (key 160).
The two center O-rings are retained in the bypass
38
lever assembly by applying a slight twist to the
O-ring with the thumb and first finger while pushing
the O-ring into place.
4. Install the bypass lever assembly (key 160) into
the bypass body (key 161) with a gentle twisting and
pushing motion to reduce the chance of nicking an
O-ring.
5. Install the retaining ring (key 165) and the wire tie
(key 166).
6. Assemble the bypass body (key 161) and the
bypass body gasket (key 163) onto the bypass body
adaptor (key 162) with the four socket head screws
(key 169). Ensure that the holes in the gasket are
aligned with the holes in the bypass body. If the
gasket is installed upside down, the bypass valve
will not work.
7. If the reversing plate (key 23, figure 25) is
removed, install the reversing plate gasket (key 24,
figure 25) and reversing plate (key 23, figure 25) with
the reversing plate screw (key 49, figure 25). When
installing the gasket, make sure one of the three
gasket holes is over the exhaust slot in the
positioner case (key 115A, figure 25). If direct action
is required, adjust the reversing plate so the letter D
is showing and the letter R is entirely covered. If
reverse action is required, adjust the reversing plate
so the letter R is showing and the letter D is entirely
covered. Tighten the screw (key 49).
8. If the input module is removed, perform the
Assembling the Input Module procedure.
9. Plug the relay A and relay B output connections
and apply 2.4 bar (35 psig) to the Instrument
connection. Using soap solution or some other
solution compatible with Nitrile rubber, check the
bypass assembly for leaks at the gasket and O-ring
seals while rotating the bypass lever to both
BYPASS and POSITIONER.
Changing Positioner Types
Changing a 3610J to a 3610JP Positioner,
Changing a 3620J to a 3620JP Positioner,
or Vice Versa:
1. The nozzle (key 116, figure 25) must be changed.
3610J, 3610JP, 3620J, and 3620JP nozzles can be
identified by referring to figure 7. Refer to the
Disassembling the Nozzle Assembly and
Assembling the Nozzle Assembly maintenance
procedures.
2. The supply and output gauges [keys 79 (not
shown) and 81, figure 26] must be changed and
possibly the instrument gauge (key 80, figure 26)
depending on the instrument input signal. Apply
sealant (key 154) to the threads of the gauges.
Instruction Manual
June 2008
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