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3610J and 3620J Positioners
Assembling the Feedback Lever Assembly
procedure; then, continue with steps 13 through 15
below.
12. Install the range spring (key 150). Refer to
tables 8 through 11 and figure 15 for the correct
summing beam hole number.
13. Assemble the flexure adjustment (key 156) onto
the two minor loop feedback flexures. Slide the
flexure adjustment along the entire length of the
flexures, making sure it does not rub against the
relay at any point. If contact is made with the relay or
diaphragm edges at any point, remove the flexure
adjustment, loosen the twelve machine screws
(key 47), slide the relay manifold slightly to provide
clearance and tighten the machine screws (key 47).
Perform steps 2 through 5 of the Disassembling the
Summing Beam Assembly procedure and loosen the
two machine screws (key 124). Perform steps 4
through 10 of the Assembling the Summing Beam
Assembly procedure. Assemble the flexure
adjustment on the minor loop feedback flexures and
check for clearance.
14. Slide the flexure adjustment (key 156) to the
proper X dimension per figure 14 and tighten the
socket head screw (key 55). For 3611JP and
3621JP positioners only, install the parallel flexure
(key 179) with the two socket head screws and lock
washers (keys 180 and 181). The parallel flexure is
not used on positioners with 585 size 100 actuators.
Assembling the Relay
Refer to figure 25 for key number locations while
assembling the relay.
1. Replace the pressure plate gasket (key 115D)
and pressure plate (key 115C) with the ten machine
screws (key 115J). Visually align the two large holes
in the pressure plate with the two stainless steel
pressed-in valve seats in the positioner case
(key 115A) and tighten the machine screws.
2. Install the valve plugs (key 115G), valve plug
springs (key 115H), and valve plug shrouds
(key 115K) in the two relay holes. Place the body
plug gaskets (key 115F) on the body plugs (key
115E) and tighten in the positioner case.
3. If the pivot pin (key 10) was removed from the
relay manifold (key 9), apply a light coat of lubricant
(key 153) to the pin and slide it into the relay
manifold and relay beam assembly (key 122).
Position the pivot pin so it is flush with the left side of
the relay manifold as viewed in figure 13, and tighten
the two set screws (key 57). The pivot pin must not
rub against the flexure adjustment (key 156).
36
4. Assemble the supply relay head (key 15) and
nozzle relay head (key 14) onto the relay beam
assembly (key 122) with the two machine screws
(key 50), but do not tighten the screws. The nozzle
relay head is the larger in diameter of the two and is
installed in the large manifold hole. Insert the nozzle
relay head holder from the repair kit through the
larger manifold hole and into the nozzle relay head
(key 14). Insert the supply relay head holder from
the repair kit through the smaller manifold hole and
into the supply relay head (key 15). Tighten the two
machine screws (key 50). Remove the nozzle relay
head holder and supply relay head holder from the
manifold. The nozzle relay head (key 14) and supply
relay head (key 15) are now correctly aligned in the
center of the manifold holes.
5. Dimple the relay nozzle diaphragm (key 8) and
relay supply diaphragm (key 7). Place both
diaphragms in the positioner case (key 115A) with
the fabric side of the diaphragms showing and align
the diaphragm holes with the mounting holes in the
positioner case.
6. Carefully place the relay manifold/beam
assembly over the relay diaphragms. Ensure the
relay diaphragms are lying flat and the diaphragm
edges are not doubled over. Ensure that the
diaphragm convolutions are centered in the relay
manifold holes and are not pinched. The relay beam
assembly (key 122) flexure must be on top of the
summing beam assembly (key 123) flexure as
shown in figure 14).
7. Install the twelve relay manifold machine screws
(key 47), but do not tighten them.
8. If the summing beam assembly (key 123) is
removed, perform the Assembling the Summing
Beam Assembly procedure, steps 1 through 12.
Then, continue with steps 9 through 11 below.
9. Slide the relay manifold (key 9) slightly if
necessary, to visually align the relay beam assembly
(key 122) flexure with the summing beam assembly
(key 123) flexure along their entire length. Tighten
the twelve machine screws (key 47).
10. Assemble the flexure adjustment (key 156) onto
the two minor loop feedback flexures. Slide the
flexure adjustment along the entire length of the
flexures making sure it does not rub against the
relay at any point. If contact is made with the relay or
diaphragm edges at any point, remove the flexure
adjustment, loosen the twelve machine screws
(key 47), slide the relay manifold slightly to provide
clearance and tighten the machine screws (key 47).
Perform steps 2 through 5 of the Disassembling the
Summing Beam Assembly procedure and loosen the
two machine screws (key 124). Perform steps 4
Instruction Manual
June 2008
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