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MAINTENANCE
11. Remove
the intermediate
volute
and slide the im-
peller spacer
off of the shaft.
12. Remove the impeller.
Don't disturb
the shaft keys if
you are only replacing the seal.
13. Rotate
the seal spring
retainer
cup so that the slot
lines up with the shaft keys; remove
the cup and
spring.
14. Remove
the two cap screws
holding
the adapter
bracket
to the motor.
15. With
two screwdrivers
on opposite
sides
of the
pump,
carefully
pry the pump
adapter
away from
the motor.
This will pull the seal off of the motor
shaft. Use caution
to make
sure that the ceramic
seal does not dig into the shaft
and
scratch
the
shaft's sealing
surface.
Installation
Of New
Seal
1.
Clean
all gasket
surfaces
thoroughly
before
re-
assembly.
Clean the __
in the pump
adapter.
2.
Wet the rubber
seat ring with soapy water and push
the stationary
part of the seal into the seal bore cav-
ity. Use a piece of 1" pipe pressing
on a cardboard
washer
(to prevent
damaging
seal surface)
as a
press. Make sure that the seal half is fully
seated
in the seal bore cavity. Remove the cardboard
once
. the seal is in place.
3.
Make sure that the shaft keys are in place on the
shaft. If they are not, squeeze
them
in place now
with slip joint pliers. Do not tap them or hit them
with
a hammer;
you
could
bend
the shaft
(see
Figure 23). When
the keys are correctly
installed,
the adapter
will pass over the keys without
inter-
ference.
!
Use pliers-
with care -
no hammers.
Figure 23
.
Figure 24
Carefully
slide the
adapter
over the
shaft
(see
Figure 24). Do not damage the shaft sealing surface;
it is highly polished
and any slight scratches
or nicks
will ruin it.
Align
Marks
.
.
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.
Push the shaft seal and seal spring
onto the shaft,
after making
sure that the seal faces and shaft are
dean.
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 25).
Figure 25
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
gasket
is right side up so that the water passage
holes line up with
the water passages
in the vo-
lutes.
13
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