ABB AV2123000 Positioner User Manual

REPAIR AND REPLACEMENT
5. Slide the I/P converter out from under the screws and remove it
from the housing.
6. Disconnect the two air lines from the I/P converter. When replacing
the I/P converter, remove the portion of the air line tubing that was
connected to the I/P converter or replace the tubing. If this is not
done, particles from the tubing can cause a blockage.
7. Reverse the preceding steps to install the new I/P converter.
Cam
Tools Required: • Flat-tip screwdriver.
• Adjustable wrench.
• Pliers.
NOTE: Item numbers reference Figure 9-3.
1. Transfer the positioner from automatic to manual operation
(Section 5).
2. Remove the positioner cover by removing the two cover screws.
3. Remove the indicator screw (Item 51) and indicator (Item 19).
4. Hold and stop the cam shaft from rotating if it is not secured by
linkage or coupling. Using the adjustable wrench, remove the cam nut
(Item 30) and washer (Item 55).
5. Lift the cam from the cam shaft.
6. To replace the cam, determine which cam mounting hole (A, B or
C) is appropriate for the application, and set the cam on the shaft.
Make certain the star-shaped hole engages squarely on the shaft.
Refer to Figure 3-8 to align the cam.
7. Replace the cam washer and nut and tighten.
8. Set the indicator on the cam shaft and insert and tighten the
screw.
9. Transfer the positioner back to automatic operation (Section 5).
Diaphragm Assembly
NOTES:
1. Refer to Section 9 for diaphragm assembly kit numbers.
2. Item numbers in this procedure reference Figure 9-3 or 9-4.
REPLACEMENT PROCEDURES
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