AXEON Fluid-O-Tech Repair Rebuild - Manual (Page 11)

08/09 Ed., Rev. B Page 11of 16
9) Sometimes pushing the seal over the shaft in the next few steps can be difficult. It helps to
wet the seal and shaft with water, or even better, ethyl alcohol prior to doing this. The same
applies to the counterface which will be inserted later. Do not use any type of grease or oil to
install the seal or counterface. This can result in the shaft slipping in the seal during use,
which will rapidly wear the rubber, and cause the pump to leak. The seal is meant to stay in
the correct location on the shaft by friction.
10) Locate the seal. Position the seal on top of the rotor shaft with the graphite end facing
upwards. Using the plastic tube (material #7), press the seal over the shaft to the proper
depth. Use caution slipping it over the machined edges on the tip of the shaft, as they can
scrape the seal if not careful. The distance from the rear flange to the graphite ring of the
seal, while under pressure from the plastic tube, is 21mm, +/- .1mm. The seal will spring up a
little bit higher than this when pressure is taken off of the seal.
11) Now you will want to set the graphite/rotor assembly aside, and locate the stainless
washer and the counterface. Position the pump body on the table with its bearing end facing
down. Place the washer inside the body so that it rests on top of the small internal retaining
ring or shoulder. Wet the area around the washer and the counterface with ethyl alcohol to
make the installation easier. Next, place the counterface, with the white ceramic side facing
up, above the washer. It will need to be pressed in with the plastic rod (material #6), either by
hand or carefully with the arbor press. It is important to seat the counterface carefully and
uniformly. The stainless steel washer behind the counterface should no longer move around
freely.
12) Now take the graphite/rotor assembly and support it ¼ to ½” off the arbor press work
surface, with the seal facing upwards. Support it by the graphite, and not the tip of the rotor,
and make sure nothing is in the way of the body’s rim sliding beyond the bottom edge of the
front flange. The two holes on one side of the graphite assembly should face to the right (3
o’clock position). Now locate and insert the alignment pin into the alignment notches on the
top of the graphite (12 o’clock position). Sometimes water will help it stay in place.