Flow HYPLEX, Manual, Page: 43 / 100

Using the pressure loading tool
The pressure loading tool is used to accurately load and
unload the tie rods on the HyPlex Prime pump. Follow
these instructions to prevent damage to the tie rods,
high-pressure seals, or cylinders.
CAUTION
Do not use a torque wrench to attempt to
tighten the tie rod nuts. No methods other than those de-
scribed in this section may be used to load the tie rods.
Unloading the tie rods
1. Rotate the threaded pressure loading tool plunger
counter-clockwise until it stops to ensure it is fully re-
tracted. Install the pressure loading tool onto the tie
rods by running the tool studs onto the exposed
threads of the tie rods.
When tightening, alternate between opposite studs to
avoid binding. Tighten the tool studs firmly in order
to seat the tool piston fully into the tool body, and
against the end cap as shown below.
Note: The threaded plunger of the pressure loading
tool must be backed to the stop in order to fully seat
the piston within the cylinder.
2. Back out the four tool studs 1/4 turn. This allows for
easy removal of the loading tool after unloading is
complete.
3. Use a 19 mm (3/4 in.) socket and ratchet to rotate the
tool plunger clockwise until a value of 1500 bar
gauge pressure is reached.
4. Loosen the four primary hex nuts two full turns. Use a
24 mm (15/16 in.) combination wrench if needed.
5. Use a 19 mm (3/4 in.) socket and ratchet to rotate the
tool plunger counter-clockwise until the gauge pres-
sure reads 0 bar. Rotate the threaded tool plunger un-
til it is fully retracted.
6. Back out all four of the tool studs to remove the tool
from the tie rods.
Note : Alternate between opposite studs to avoid
binding. Use a 22 mm (7/8 in.) combination wrench
if needed.
7. Repeat Steps 1–6 for the remaining pump positions.
© Flow International Corporation
M-416 | 43
CHAPTER 4
Service