Revision 1.8 / June 2016
10
Wet End Assembly
1. Place the pump housing, item 300, onto the power frame, item 600, by fitting the opening in the
back of the pump housing over the shaft, item 200. NOTE: Be sure that the mating flanges of the
power frame and pump housing are free of any debris or nicks, as this may cause misalignment of
the rotor. Warning: Suitable lifting equipment should be used when installing the pump housing to
ensure that personal injury or damage to pump components does not occur.
2. Install the housing mounting washers, item 345, and housing mounting bolts, item 340, through
the rear of the power frame. The bolts should be tightened evenly and to the torque specification
provided on page 28.
3. Replace the seal housing o-ring, item 540, by fitting it into the groove in the rear of the pump
housing. Apply a food grade lubricant to the o-ring before installation.
4. If the lip seal housing, item 500, is stainless steel, replace the dynamic face o-ring, item 515, by
placing it into the groove at the end of the seal housing. Apply a food grade lubricant to the o-ring
before installing. Place the seal housing into the bore in the rear of the pump housing, item 300,
such that the removal holes on the outer diameter are exposed. NOTE: Lubricating the outer
diameter of the rear of the seal housing will promote easy assembly with the seal housing o-ring,
item 540. If the seal housing is stainless steel, the anti-rotation pin in the rear of the seal housing
must be sealed properly in the slot in the rear of the pump housing. To properly seat the seal
housing, place the rotor, item 011, and the shaft nut, item 231, over the shaft, item 200. Tighten
the shaft nut to force the seal housing past the seal housing o-ring. Remove the rotor and shaft
nut from the shaft before proceeding. For further assembly procedures for your specific seal
arrangement, refer to the seal system assembly section of this manual.
5. Replace one of the rotor o-rings, item 030, by placing it into the groove on the end of the shaft
sleeve, item 530. Apply a food grade lubricant to the o-ring before installing. The shaft sleeve my
then be fitted over the shaft and into the seal housing.
6. Install one of the liners, item 072, into the pump housing being sure to fit the liner between the two
anti-rotation pins located on the internal diameter of the pump housing. Apply even pressure to
both ends to prevent the liner from becoming lodged in the pump housing.
7. Place the scrapergate, item 125, into the scrapergate guide, item 100, being sure that the marked
ends (SL and SR) match up properly. Referencing page 20 of this manual, place the scrapergate
and scrapergate guide in the desired orientation. Using both hands, this assembly can then be
placed on the rotor, item 011, such that the opening in the scrapergate and scrapergate guide fit
over the rotor vane. Install this three-piece assembly in the pump by placing the scrapergate guide
into the bore located between the suction and discharge nozzle and fitting the rotor over the
splined section of the shaft. NOTE: There is no front or back to the rotor, so it can be inserted
either way. Once the rotor meets the rotor o-ring on the shaft sleeve, apply extra pressure to
insure that the rotor is seated over the o-ring.
8. Replace the other rotor o-ring, item 030, by placing it into the groove on the end of the shaft nut,
item 231. Apply a food grade lubricant to the o-ring before installing. The shaft nut can then be
tightened onto the shaft. Wrench flats have been machined on the rear of the shaft for the purpose
of securing the shaft while tightening the shaft nut. Torque the shaft nut to the specification listed
on page 28.
9. Install the other liner, item 072, into the pump housing being sure to fit the liner between the two
anti- rotation pins located on the internal diameter of the pump housing. Apply even pressure to
both ends such that the liner does not become lodged in the pump housing.
