Specifications Information and Repair Parts Manual
489 & 490 Series
4890-251-00
2
9/2016
1. Thoroughly clean all surfaces of seal seat cavity in adapter.
2. Using a clean cloth, wipe shaft and shaft sleeve and make certain that
they are perfectly clean.
3. Wet the rubber portion of new seal seat with a light coating of soapy water.
While wearing clean gloves or using a clean light rag, press seal seat
squarely into adapter recess. Use cardboard washer (usually supplied
with new seal), place over polished surface and use a piece of pipe or
dowel rod to press in firmly but gently. Avoid scratching polished face.
4. Dispose of cardboard washer. Check again to see that polished face is
free of dirt and all other foreign particles and that it has not been scratched
or damaged.
5. Wet the inside rubber portion of new seal head with a light coating of
soapy water. Slide head onto motor shaft with sealing surface facing seal
seat (see figure 2).
Note:
A short “run in” period may be necessary to provide completely leak-free
operation.
6. Screw impeller onto shaft. Use screwdriver slot at rear of motor shaft
(opposite the threaded end) to tighten impeller.
NOTE:
It may be necessary to remove plug in motor end cap to expose slot.
If removed, be sure to reinstall plug AFTER pump is completely assembled.
7. Check if shaft turns freely by spinning impeller. If rubbing or binding is
found, remove impeller and add a shim to shaft, then recheck. Repeat
procedure until all rubbing is eliminated.
8. Slide impeller seal onto exposed shaft. Screw acorn nut onto shaft and
tighten.
9.
Place casing seal on adapter mounting flange. Attach casing using bolts
being careful not to pinch or “shave” casing seal. As casing is being
tightened, periodically spin impeller to check for interference with casing.
Seal will produce minor drag when spinning motor shaft, but rubbing
anywhere else must be eliminated! Otherwise, damage to pump and/or
motor may occur.
High Head Centrifugal Pumps