Changing The Range Spring; Replacing Gaskets - Emerson Fisher 3582i Instruction Manual

3582, 582i, and 3583
January 2013
In case of operational difficulties, the valve positioner or valve stem position transmitter should first be checked to see
that adjustments have been properly made. All pressure lines and connections should be checked for leaks.
The pneumatic relay and gaskets should also be inspected and replaced if necessary.
Instructions are given below for:
D changing the range spring;
D replacing gaskets, nozzle O‐rings, and relay;
D adjusting the flapper pivot;
D replacing the 582i converter primary O‐ring and filter;
D replacing the 582i converter cover O‐ring;
D removing the 582i converter; and
D reassembling the 582i converter.

Changing the Range Spring

Unless otherwise noted, key number locations are shown in figure 21.
The range spring is inside the bellows assembly. Standard range spring data is given in table 9. When an input signal
range is split to operate two or more control valves, normally changing the range spring is not necessary. The input
signal range for the range spring is stamped on the nameplate.
Perform the following procedure to change the range spring in a valve positioner or valve stem position transmitter.
1. Unhook the extension springs (keys 27, 77) from the beam (key 29).
2. Loosen and remove the two screws (key 13), and lock washers (key 12) that hold the bellows assembly (key 7) in
place.
3. Lift out the beam and bellows assembly. Be careful not to lose the small O‐ring (key 11).
4. Loosen the machine screw (key 10), and remove the range spring (key 8).
5. Install a new range spring, making sure the small end of the spring is against the spring seat (key 9). Replace the
spring seat and tighten the screw.
6. If the O‐ring (key 11) is worn or damaged, replace it with a new one after applying lubricant (key 94). Make sure the
O‐ring is in place, then install the bellows assembly, securing it with two mounting screws and lock washers.
7. Install the beam over the pivots and hook the springs to the beam.
8. Make any minor adjustments that may be necessary to re‐level the beam as outlined in the beam alignment
procedures of the valve positioners or the valve stem position transmitters calibration section. After leveling the
beam, calibrate the unit according to the appropriate calibration instructions.

Replacing Gaskets

Unless otherwise noted, key numbers used in this procedure are shown in figures 24 and 25.
A gasket (key 34C) is located behind the bypass handle (key 34D) of 3582 valve positioners or the manifold (key 34D)
of 3583 valve stem position transmitters.
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Instruction Manual
D200138X012