16 | Baker Hughes
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3.9 Remove the Diaphragm and inspect for any bubbles,
cracking or other damage that may be present. Replace
if necessary.
3.10 Remove the Lower Diaphragm Support plate.
Note: The Lower Diaphragm Support plate also has an
internal O-ring that should be inspected and replaced if
necessary.
3.11 The Seal Pack is held in place by four Cap Screws.
Remove the four Cap Screws and remove the Cover
Plate. Two threaded holes are used for jacking or lifting
the Seal Pack out as a complete unit.
3.12 Thread two of the Seal Pack cap screws into the extra
holes and tighten to lift the Seal Pack out of the Lower
Actuator Housing.
3.13 Due to the difficulty in replacing the Seal Pack’s internal
Stem Seal, it is recommended that the Seal Pack be
replaced as a complete unit.
3.14 If inspection of Plug Seal and Seat Insert are being
performed, the Lower Diaphragm Housing can be
removed - exposing the Plug assembly.
3.15 If Lower Diaphragm Housing is difficult to remove, two
cover bolts may be inserted into opposite threaded holes
on the Housing and used as jacking screws.
3.16 Attach Lift Eyes to two threaded holes in housings and lift
vertically.
3.17 Inspect and replace O-ring in Adapter Housing.
3.18 Plug assembly may be removed by lifting Stem. Plug will
experience a click when the Plug Seal transitions from
the cage to the Adapter Housing. Force may be required
to move the Plug assembly past this point.
Note: Adapter Housing does not need to be removed.
3.19 Remove Cotter Pin and remove the Castle Nut.
3.20 Remove Plug. Set Screw in Plug Skirt does not need to
be removed.
3.21 Replace Seat Insert.
3.22 Replace Plug.
3.23 Install Castle Nut and tighten as per Table 5. Use wrench
flats to hold part and prevent the assembly from turning.
3.24 Install Cotter Pin and deform at least 90 degrees for
proper locking.
Threaded
Jacking Hole
