Flow HYPLEX Manual page 86

HYPLEX PRIME PUMP
Maintenance & Service Manual
Installation and reassembly
1. With the crosshead in its fully extended position, ap-
ply anti-seize to the nut, and place spring into the
counterbore of the plunger nut. Slip the nut and
spring over the new plunger, engage the threads of
the crosshead, and tighten to 20 ft-lb (27 N-m) using
the plunger nut tool.
2. With the v-shaped face of the rod seal towards the
subplate adapter, install the new seal in the
counterbore of the subplate adapter.
3. Place the spacer in the counterbore with the
chamfered side down (toward the newly-installed
seal).
4. Secure the rod seal and spacer with the snap ring.
5. Lubricate and install the o-rings onto the adapter,
and slide over the plunger until it engages the coun-
ter-bore of the subplate.
Repeat for the remaining subplate adapters.
86 | M-416
Assemble and install the dynamic seal carrier
1. Inspect the dynamic seal carrier for cleanliness.
Make sure the guide bearing of the seal carrier is
flush with the face of the carrier and is in good con-
dition (the presence of cracked or loose pieces is
reason for replacement).
Replace the dynamic seal carrier if necessary. Clean
as necessary.
2. Install the rod seal as shown with the v-shaped face
facing up, away from the dynamic seal carrier.
3. Install the new dynamic seal into the inner diameter
of the rod seal, making sure the dynamic seal is fully
seated against the dynamic seal carrier.
Note: Make sure the plungers are clean and free of
any damage or scratches before installing the dy-
namic seal carriers. The subplate adapter/seal carrier
interface must be clean and free of debris.
4. Slide the seal carrier onto the plunger until seated
against the register of the adapter.
Repeat for the remaining dynamic seal carriers.
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