Replacing The Lever Assembly - Fisher FIELDVUE DLC3010 Instruction Manual

Maintenance & Troubleshooting
October 2014
1. Remove the digital level controller from the sensor as described in Removing the Digital Level Controller from the
Sensor.
2. Loosen and remove the hex nuts (key 34) from the studs (key 33) and remove the adapter ring (key 32).
3. Remove the coupling shield (key 16) by removing the two screws (key 13). Take care not to drop the screws into the
lever assembly compartment where they will be attracted by the magnets.
4. Inspect the lever assembly alignment with the housing. If it is off center or not co‐axial with the main housing,
continue with the removal procedure.
5. Loosen and remove the mounting screw (key 14) from the lever assembly.
6. Loosen the flexure block from its machined pocket in the housing, by inserting a smooth tool into the hole for the
mounting screw, and gently rocking it back and forth in what would be the vertical axis if the transmitter were
installed.
7. Lift the lever assembly out of the housing.
Inspect the flexure for damage. If the flexure is bent or torn, replace the lever assembly.

Replacing the Lever Assembly

Replacing the lever assembly in the field may result in a slight degradation in linearity performance, since the factory
characterizes the entire transducer module as a unit. For most applications, this degradation should not be noticeable.
(If guaranteed restoration to factory specification is desired, the entire transducer module should be replaced.)
1. Move the zero‐pin slide to the locking position.
2. Apply a thin coat of a light grade of grease to the internal thread of the hole for the lever mounting bolt.
3. Hold lever assembly by coupling block and guide the flexure block into its aligning slot in the housing without
applying any downward force to the sprung parts of the lever assembly.
CAUTION
To prevent damage to the flexure when inserting the flexure block into its aligning slot in the housing, apply pressure to
the flexure block only.
A long pin inserted into the bolt‐hole in the flexure block may be used to pull it against the inside corner of the aligning
slot.
4. Secure the block by reinstalling the M5x20 socket‐head cap screw (key 14). Torque to 2.8 NSm (25 lbfSin) $10%.
5. Mark bolt head and block with a movement‐detecting sealant.
6. Install the coupling shield (key 16) and secure with the two screws (key 13). Tighten the screws to 0.48 NSm
(4.2 lbfSin).
7. Refer to figure 7‐1. Install the adapter ring (key 32) on the studs (key 33) and secure with hex nuts (key 34). When
re‐installing the digital level controller, follow the appropriate procedure outlined in the Installation section. Set up
the digital level controller as described in the Setup and Calibration section.
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Instruction Manual
D102748X012