Instruction Manual
D103032X012
L2 Controller
July 2015
11
Maintenance
Parts are subject to normal wear and must be inspected periodically and replaced as necessary. The frequency of parts
inspection and replacement depends upon the severity of service conditions. When inspection or repairs are required,
disassemble only those parts necessary to accomplish the task.
WARNING
Always wear protective clothing, gloves, and eyewear when performing any maintenance operations to avoid personal
injury.
To avoid personal injury or property damage caused by the release of pressure or process fluid, observe the following
before starting maintenance:
D Personal injury or property damage may result from fire or explosion if natural gas is used as the supply medium and
appropriate preventive measures are not taken. Preventive measures may include, but are not limited to, one or more
of the following: Remote venting of the unit, re‐evaluating the hazardous area classification, ensuring adequate
ventilation, and the removal of any ignition sources. For information on remote venting of this controller, refer to
page 6.
D Provide some temporary means of control for the process before taking the controller out of service.
D Provide a means of containing the process fluid before removing any measurement devices from the process.
D Vent any trapped process pressure.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Removing the Controller From the Sensor
1. Disconnect the supply and output pressure lines.
2. Slide the hook end of the zero spring (key 5, figure 8) over and off the controller end of the displacer rod
(key 64, figure 7).
3. Remove the four controller mounting screws (key 11, figure 8), and pull the controller straight away from the
sensor.
Replacing the Sensor O‐Rings
Refer to figure 7 for key number locations unless otherwise indicated.
Disassembly
1. Remove the controller from the sensor by following the procedure outlined in the previous section.
2. Remove the sensor from the tank.
3. Unscrew the hex nut (key 67) and remove the spacer (key 66) and spring (key 68). After removing the spring,
replace the spacer (key 66) and hex nut (key 67) on the displacer rod.
From the displacer end, pull the displacer rod away from the sensor connection (key 65) to pull the pivot base
(key 73) loose from the sensor connection. Remove the hex nut (key 67) to permit removing the displacer rod,
pivot base, pivot body, and spacer from the sensor connection.
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