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20 Steps to remove a transducer assembly from a meter while the meter is under line pressure
Section 4: Removing a transducer assembly Operation Manual
September 2013 3-9000-744 Rev F
f. Adjust the pressure on the extractor tool piston assembly (P) to exceed the force
of line pressure exerted on the extractor rod (N). Refer to Table A-1 piston and line
pressure chart. To do this,
– Slowly rotate the pressure regulator (V) adjustment screw in a clockwise
direction.
– Monitor the line pressure indicated on the lubricator chamber pressure
gauge (T).
– Continue turning the adjustment screw until the extractor tool piston
assembly (P) pressure indicates the line pressure shown in Table A-1.
– The outside surface of the piston assembly (P) cylinder lists a
corresponding piston pressure chart for the line pressure measured on
the lubricator chamber pressure gauge (T).
g. Using an open end 1-¼” wrench on the hex of the lubricator chamber extractor
rod (N), fully unscrew the transducer holder (K) from transducer mount (E). As
the extractor rod (N) is rotated in the counter-clockwise direction watch for
lateral movement of the extractor rod (N). When the lateral movement no longer
occurs the transducer holder (K) is completely free of the transducer mount (E).
h. Reduce the pressure of the extractor tool piston assembly (P) by fully unscrewing
(counter-clockwise) the adjustment screw of the pressure regulator (V) until
loose. The piston orifice fitting (Y) will slowly allow pressure to vent from the
extractor tool piston assembly (P) causing the extractor rod (N) to slowly retract
to a fully retracted position which is indicated by the visibility of a mark on the
extractor rod (N) at the end of the lubricator chamber assembly (M). If the
extractor rod (N) becomes jammed, which may be indicated by the stopping of
the movement of the extractor rod (N) before the piston is fully retracted, verify
that the extractor tool valve assembly is in the full open position.
Important
The extractor tool is designed with a shear pin safety device intended to shear off
if the transducer holder is frozen or galled in place. If the shear pin is sheared off,
stop the extraction procedure and blow the line down.