Doc No: OMM50001243
Rev: C Page 28 of 68
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11. Clean the fluid cylinder counter bores and the appropriate
stuffing box regions to avoid contamination during
assembly. Apply oil to the plungers, packing, and stuffing
box bores.
12. Reverse the previous steps to rebuild the pump after
damaged components have been replaced. Installation
Tip: The packing and junk rings should be driven into the
stuffing box until the throat bushing is just inside the stuffing
box.
13. FMC suggests that all seals or gaskets that are disturbed
during a service procedure be replaced. Ensure that all
fasteners are tightened to the values specified in Table 7:
Torque Values for Critical Pump Fasteners.
14. When tightening fasteners on cylinder cover clamps, use
crisscross tightening in three stages of torque. Begin at
approximately 25% of the final torque value, then 50% of
the final torque, and finish at full torque valve. CAUTION: If
the fluid cylinder was separated from the stuffing boxes or
removed, ensure the stuffing boxes are properly piloted in
the fluid cylinder and alignment is correct (stuffing box and
plunger are axially aligned to plunger rod and perpendicular
to the fluid cylinder mounting surface). The boxes should
easily slide into the fluid cylinder counter bore.
15. The plunger tip will thread easily into the plunger rod if
alignment is correct. If it does not, loosen the nuts (50) and
check alignment.
