MAINTENANCE
4.
Carefully
slide the adapter over the shaft (see
Figure 27). Do not damage the shaft sealing surface;
it is highly polished and any slight scratches or nicks
will ruin it.
5. Using the alignment marks made before disassem-
bly, line up the adapter with the motor and bolt the
adapter in place. Tighten the cap screws evenly.
6. Push the shaft seal and seal spring onto the shaft,
after making sure that the seal faces and shaft are
clean.
Take care that the shaft shoulder does not
damage the carbon seal face.
Follow the seal
spring with the spring holder; compress the spring
and give the spring holder a quarter turn to lock it
under the first shaft key (see Figure 28).
7. Slide the first impeller onto the shaft; follow it with
the impeller spacer. Twist the impeller on the shaft
to make sure that the shaft key is still in place and
the impeller is locked to the shaft (the shaft should
turn with the impeller).
8. Install a new volute gasket, lining up the bolt holes
with the bolt holes in the adapter.
Make sure the gas-
ket is right side up so that the water passage holes
line up with the water passages in the volutes.
9. Install the intermediate volute, aligning it with the
mark made before disassembly. Use the long cap
screws to check this alignment.
It cannot be
stressed too strongly that all bolt holes and water
passages of all gaskets and volutes MUST line up
with each other, or the pump will not be assem-
bled correctly.
10. Make sure the second shaft key is in place and in-
stall the second impeller. Twist the impeller to
make sure that the shaft key is still in place. Hold
the motor shaft with slip-joint pliers or vice-grips
and install and tighten the impeller locknut.
Tightening the lock nut automatically spaces the im-
peller correctly.
Do not overtighten.
11. Install the base volute gasket.
Make sure the gasket
is right side up so that the water passage holes line
up with the water passages in the volutes
. Install
the base volute, using the alignment marks made
before disassembly. Make sure that the pump dis-
charge will correctly meet the the piping when the
pump is reinstalled.
12. Insert the four base capscrews and tighten evenly
(see Figure 29). These should be easy to install if ev-
erything is correctly aligned.
If not, don’t force
them; go back over your work and find and cor-
rect the misalignment.
13. Reinstall the pressure switch barb fitting and pres-
sure tube.
14. Reinstall the pump on the adapter flange (use a new
gasket) and reconnect the wiring and grounding.
Pump is now ready for operation.
14
Make sure
all marks
line up.
Bolts should
be easy to
insert.
Figure 29
Align
Marks
Figure 27
Figure 28
