AXEON Fluid-O-Tech Repair Rebuild - Manual (Page 12)

08/09 Ed., Rev. B Page 12of 16
13) Take the pump body place it over the top of the rotor/graphite assembly, with the acorn
nut facing directly to the left and the ports facing upward (toward 12 o’clock). Locate the ball
bearing and position it in the hole on the top of the pump body. Using the metal tube (material
#10), press the body and bearing over the graphite/rotor assembly slowly and carefully,
guiding the graphite into the pump as you go. Continue pressing until the graphite is all the
way in and the bearing is flush with the pump body.
14) Flip the pump over on its shaft end. Make sure that the exposed flange is free of debris.
Locate the o-ring, and insert it into the groove in the graphite, running you finger over it in a
circle to ensure it is seated evenly. Place the cap or stainless cover over the o-ring. If the
pump uses a screw-on style cover, screw the cover on at this point. If it has a retaining ring
style cover, rest the large retaining ring on top of the cap. Position this under the arbor press
and rest the ram on the cap. While applying slight pressure, insert the retaining ring into the
groove using the retaining ring pliers. Once in the groove, apply a little more pressure with
the arbor press to allow the ring to further seat itself. It is then important to squeeze the ring
against the rim in several spots around the perimeter, with the pliers or some other similar
tool, in order to completely seat the retaining ring.
15) Now turn the pump by hand. It should offer some resistance, but feel smooth (the torque
should not be greater than 2.6 in.-lbs.). If it is very difficult to turn the pump by hand, it will
generally have to be disassembled, checked and then reassembled. This is often caused by
a tiny bit of debris getting stuck between the rotor and the flanges, or a not fully seated set of
graphite. Occasionally, a gentle tap on the end of the shaft with a hammer can fix the
problem, although not usually, and great caution must be exercised.
16) The last thing to do is change out the bypass o-ring, if your pump is equipped with a
bypass. If you don’t plan to test the bypass setting before putting the pump back into service,
make note of the position of the screw so that you can return it to the same position when you
are finished. Unscrew and remove the screw in the center of the acorn nut. You will see a
small o-ring at the head of the screw. Remove this o-ring and install the new one. Be careful
not to cut the new o-ring on the head of the screw, as it sometimes has a sharp edge. Screw