Emerson Rosemount 3812, Руководство по техническому обслуживанию и устранению неисправностей

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2. Using a 1/2 inch wrench on one of the top end shroud bolts, rotate
counterclockwise to unscrew and remove. Repeat to remove the second bolt (see
Figure 3-6 ).
3. Remove the top end shroud by pulling the part away from the Transmitter
Electronics Enclosure (see Figure 3-7 ).
4. Hold both ends of the clamped band shroud flat against the body OD. Using a flat
blade screw driver or 5/16 nut driver, loosen both worm screw clamp assemblies.
Alternate between the two worm screw clamp screws, turning each a few turns at a
time counterclockwise. Repeat as needed to fully disengage the threaded part of
the worm screw clamp from the screw part of the worm screw clamp and remove
them from the shroud.
Figure 3-8: Clamped shroud worm screw disassembly
A. Worm screw clamp threaded part
B. Worm screw clamp screw part
C. Guide pin holes
5. While holding the shroud end engaged with the guide pins against the body OD,
raise the other shroud end edge enough to unlock the threaded part of the worm
screw clamp from the shroud. To remove the worm screw clamp threaded part,
move it to approximately perpendicular to the shroud and rotate slightly to release
the "T" end from the rectangular hole in the shroud. Repeat this procedure for the
second worm screw clamp threaded part.
Meter maintenance Maintenance and Troubleshooting Manual
April 2022 00809-0100-3812
46 Emerson.com/Rosemount