Instruction Manual

Instruction Manual

D200149X012

3610J and 3620J Positioners

January 2015

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.

Note

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.

1. Loosen the socket head screw (key 55) and remove the flexure adjustment (key 156) by carefully sliding it off the

end of the two flexures (on earlier positioners, a stick‐on label will have to be removed from the top flexure prior to

removing the flexure adjustment). For 3611JP or 3621JP positioners only, remove the two socket head screws and

lock washers (keys 180 and 181) and the parallel flexure (key 179) (not used on positioners for 585 size 100

actuators).

2. Unscrew the 12 machine screws (key 47) and lift the relay manifold (key 9) and relay beam assembly (key 122) from

the positioner.

3. Remove the relay nozzle diaphragm assembly (key 8) and relay supply diaphragm assembly (key 7). Inspect them

for wear and replace if necessary.

4. Unscrew the two screws (key 50) that hold the nozzle relay head (key 14) and the supply relay head (key 15), and

separate them from the relay beam assembly (key 122).

5. Loosen the two set screws (key 57) in the relay manifold (key 9) and remove the pivot pin (key 10) and relay beam

assembly (key 122) from the relay manifold.

6. Turn the positioner over and remove the two body plugs (key 115E) and body plug gaskets (key 115F). The valve

plug springs (key 115H), valve plug shrouds (key 115K), and valve plugs (key 115G) are now exposed and can also

be removed. Inspect the valve plugs for wear and replace if necessary. Inspect the body plug gaskets (key 115F) and

replace if necessary.

7. Unscrew the 10 machine screws (key 115J), and remove the pressure plate (key 115C) and gasket (key 115D).

Inspect the pressure plate gasket and replace if necessary.

Disassembling the Summing Beam Assembly

During the following summing beam disassembly procedures, refer to figure 25 for key number locations.