Reassembly; Diaphragm; I/P Module - GE Masoneilan 4700P Maintenance Manual

Reassembly

See Figure 19 on page 68 or Figure 20 on page 71.
1. Position the diaphragm assembly (9) on the case sub-assembly. If positioner is
6-30 psi range, install reducer plate per Figure 19. Secure the body subassembly
to the case subassembly with cap screws (10). Tighten evenly to 60 inch-lbs of
torque.
2. Replace spring (5), lever S/A (3), washer (16), and retaining ring (17).
3. On 4700E/4800E, carefully place module in position against body making sure
that O-rings do not come out of grooves. Secure to body using screws (21).
4. Install the pilot assembly (11) and pressure gauges.
5. Install the positioner on the actuator. Reconnect air lines, electrical leads if 4700E/
4800E, and coupling linkage if mounted on reciprocating valve.
6. Assemble cam to shaft per procedure under "Cam Lobe Change" on page 49.
Recalibrate per appropriate Valve Action/Positioner Action calibration section.

Diaphragm

If the diaphragm has deteriorated, replace the diaphragm assembly. This requires separation of
the body and case subassemblies as outlined under "Disassembly" on page 59.

I/P Module

Replacement of the I/P module requires removal of electrical connections, including conduit if
used. Remove positioner from valve if module mounting screws are not accessible. Remove and
replace module as outlined under "Disassembly" on page 59.
NOTE
60 | =GE Oil & Gas
There are no adjustments in the I/P module.
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