Baker Hughes Masoneilan 12400 Series, Instruction Manual & Safety Manual

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g. Verify that the screw (62) on the beam (54) is loose.
h. Position the case correctly oriented toward the front and in line with the axis of the torque tube.
i. Slide the case into the torque tube flange while observing through the side opening that the pin (72) is inserted into the
beam coupling end. Use a flat tool to easily backup the coupling flexure (71).
j. When the case is in contact with the torque tube flange, verify that the beam is free to rotate by placing your finger on the
flexure (59) through the lower 3/4”NPT hole .
k. Fasten the case with four screws (121) and washers (122). Firmly tighten.
l. Verify again that the beam is free to rotate and that the coupling flexure (71) is not deformed. The coupling on the beam
(54) is tightened later.
Note: At this point, if instrument service conditions are well defined, refer to Section 7 for instrument setting, coupling
to the torque tube and setting the bias block S/A.
9.2.2. O
N A
12120
OR
12800 S
ERIES TORQUE TUBE
(
FIGURE
21)
The 12400 instrument can be mounted on different types of existing torque tubes. Kits including flange, gasket, and screws are
provided for the adapter tubes. However, due to the bias block S/A (241) implemented on 12400 SIL design, mounting and
assembly of a 12400 head with SIL design on a 12120/12800 torque tube cannot be performed.
Figure 21 - Adaptation on 12800/12120 torque tube
12400 head with SIL design cannot
be mounted on an old 12120/12800
torque tube design