Revision 1.8 / June 2016
9
Wet End Disassembly, cont.
1. Remove the front cover, item 400, by removing the five wing nuts, item 441, and sliding the cover
off of the front cover studs, item 450.
NOTE: Do not use a screwdriver or other prying
instrument to separate the cover from the housing. Damage to the stainless steel may
result.
A soft hammer can be used to separate the cover from the housing by tapping on the front
cover pins, item 420, located on the outer diameter of the front cover.
2. The front support, item 370, may now be removed from the front cover for inspection and cleaning.
If the support is stainless steel, remove the dynamic face o-ring, item 515, from the groove.
3. Remove the front liner, item 072, by pulling with even pressure on both ends. Pulling with uneven
pressure may cause the liner to become lodged in the pump housing making it difficult to remove.
NOTE: Pumping of high temperature fluids may also make the liners difficult to remove due
to thermal expansion.
If the pump has been running at a high temperature, allow it to cool before
removing the liner.
4. Remove the shaft nut, item 231, from the shaft, item 200. Wrench flats have been machined on
the rear of the shaft for the purpose of securing the shaft while removing the nut. The rotor o-ring,
item 030, can now be removed from the groove in the shaft nut.
5. Next, the rotor, item 011, the scrapergate, item 125, and the scrapergate guide, item 100, can be
pulled of the shaft and removed from the pump housing. This will require two hands.
6. Remove the rear liner, item 072. This is where the liner/ seal housing removal tools will be helpful
(refer to page 26-27). Insert the hooked ends of the liner pullers into the slots located on each end
of the liner. Again, apply even pressure on both ends to prevent the liner from lodging the pump
housing.
7. The lip seal housing, item 500, may now be removed, along with the shaft sleeve, item 530. The
liner/seal housing puller tools should be used here again (refer to pages 26-27). Simply insert the
pins on the pullers into the holes in the outer diameter of the seal housing, located 180° from each
other, and use the tool to lever the seal housing out of the pump housing. Refer to page 33-35,
Seal Options, for a diagram showing your specific seal arrangement. If the seal housing is
stainless steel, remove the dynamic face o-ring, item 515, from the groove. For further
disassembly procedures for your specific seal arrangement, refer to the seal system disassembly
section of this manual.
8. Remove the shaft sleeve, item 530, from the seal housing. The rotor o-ring, item 030, can then be
removed from the groove in the shaft sleeve.
9. The seal housing o-ring, item 540, may then be removed from the groove in the pump housing.
There is a small notch in the bore of the pump housing to facilitate easy removal of the o-ring.
10. Should removal of the pump housing, item 300, be required, remove the housing mounting bolts,
item 340, and housing mounting washers, item 345, which connect the pump housing to the power
frame, item 600.
Warning: Suitable lifting equipment should be used when removing the
pump housing to ensure that personal injury or damage to pump components does not
occur.
