Instruction Manual
D103785X012
Maintenance and Troubleshooting
June 2017
73
Replacing the Terminal Box
Note
Inspect all O‐rings for wear and replace as necessary.
1. Install two wire retainers (key 44), internal and external to the terminal box.
2. Apply silicone lubricant to the O‐ring (key 34) and install the O‐ring over the stem of the terminal box.
3. Insert the terminal box assembly stem into the housing until it bottoms out. Position the terminal box assembly so
that the hole for the screw (key 72) in the terminal box aligns with the threaded hole in the housing. Install the
screw (key 72).
4. Connect the terminal box connector to the PWB assembly (key 50). Orientation of the connector is required.
5. Reassemble the module base to the housing by performing the Replacing the Module Base procedure.
6. Reconnect the field wiring as noted in step 2 in the Removing the Terminal Box procedure.
7. Apply silicone lubricant to the O‐ring (key 36) and install the O‐ring over the 2‐5/8 inch threads of the terminal box.
Use of a tool is recommended to prevent cutting the O‐ring while installing it over the threads.
8. Apply lubricant (key 63) to the 2‐5/8 inch threads on the terminal box to prevent seizing or galling when the cap is
installed.
9. Screw the cap (key 4) onto the terminal box.
10. Install a set screw (key 58) into the cap (key 4). Loosen the cap (not more than 1 turn) to align the set screw over
one of the recesses in the terminal box. Tighten the set screw (key 58).
11. Apply sealant (key 64) to the conduit entrance plug (key 62) and install it into the unused conduit entry of the
terminal box.
Travel Sensor
WARNING
Refer to the Maintenance WARNING at the beginning of this section.
Replacing the travel sensor requires removing the remote feedback unit from the actuator.
WARNING
To avoid personal injury or property damage caused by fire or explosion, remove power to the instrument before removing
the travel sensor assembly in an area which contains a potentially explosive atmosphere or has been classified as
hazardous.