20
Transducer housing removal and installation
Section 3: Meter maintenance
Reference, Installation and Operation Manual
December 2017
3-9000-764 Rev F
1.
Before
removing the transducer housing(s), slowly vent all line pressure on the meter
to atmosphere pressure and drain the meter of fluid. Remove the transducer(s)
security seals.
See Warnings on Pages 39 and 40 of this document
.
2.
Unscrew the coupling nut on the transducer cable to remove the cable from the
transducer retainer.
3.
Unscrew the locking ring bolt and slide the locking ring from the transducer housing.
4.
Use a pair of needle nose pliers to grab the indexing key of the transducer and pull the
transducer from the housing.
5.
Place a wrench on the hex of the transducer housing and slowly unscrew in a counter-
clockwise direction from the meter. If fluid begins to leak from the meter and or you
hear or see fluids leaking from the threads, immediately stop and reinstall the housing
as the meter has not been fully drained and/or pressure has not been relieved from the
meter. Correct the issue before attempting to remove the housing again.
6.
Any time a transducer housing is removed from the meter the O-rings must be replaced
with new O-rings prior to reinstalling the housing in the meter. Apply a light coat of
Dow Corning 111
1
Silicone grease or equivalent to the O-rings Make sure the
contoured side of the backup ring faces away from the transducer housing.
7.
Ensure that the transducer port, and transducer housing are clean and free of debris.
8.
Apply a small amount of nickel anti-seize compound (P/N 2-9-9960-134) to the outer
threads of the transducer housing. Apply a light coat of Dow Corning 111
1
Silicone
grease or equivalent to the O-rings.
9.
For LT-05 transducers only, place a small amount of the Dow Corning 111
1
Silicone
grease (P/N 1-360-01-651) on the face of the transducer to be installed. Using your
finger spread the silicone grease over the face of the transducer to create a thin, even
layer of silicone grease on the surface of the transducer face. There should be no gaps or
mounds of the silicone grease on the face of the transducer. Wipe off any excess silicone
grease from the sides of the transducer.
10.
For all other transducers, place three drops of Dow Corning 200
1
Silicon Oil (12,500
Centistokes) (P/N 1-360-01-650) on the face of the transducer to be installed.
11.
Insert the transducer (parts are keyed and can only be assembled one way) into the into
the new transducer housing. Do not use any lubricant on the O-rings or contacts of the
transducers.
Replace with new O-rings during transducer maintenance or after every ten years of service.
Ensure that the transducers identified as belonging to end 1 are installed on end 1 (A1) of the
meter housing and those identified as belonging to end 2 (A2) are installed on end 2 of the
meter housing.
