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MAINTENANCE
Pump
Diassembly
1.
Pull disconnect
switch.
Disconnect
power
lines
from pressure
switch.
2.
Remove
the two cap screws
holding
the pump
to
the flange adapter.
Don't disturb
the piping
in the
well.
3.
Remove
the flange
adapter
gasket and scrape
the
surfaces
clean.
4.
Leaving
the tubing
in place,
unscrew
and remove
the straight
barbed
fitting at the pressure
switch.
5.
Draw
a line down
the side of the pump
with
a
marker
to help alignment
during
reassembly.
Mark
the pump
from the motor
to the base volute
(see
Figure 18).
.
Hold the motor
shaft
with
pliers
or vice
grips
through the opening
in the pump adapter. Unscrew
the impeller
nut off the end of the shaft (see Figure
20).
Figure 20
.
The impellers
are keyed to the shaft and do not un-
screw. Insert two screw drivers
on opposite
sides
under
the exposed
impeller
and pry the impeller
off (Figure 21) to remove
it.
Figure
18
.
Turn
the pump
upside
down
on the bench
and
block it. Remove
the four cap screws from the base.
With a mallet, tap upward
on the base to loosen it.
Lift the base off of the intermediate
volute
(see
Figure 19).
Figure 21
10. Carefully
tap a small screwdriver
or thin bladed
chisel in between
the intermediate
volute
and the
pump
adapter
in two or three
places
around
the
pump
to separate
the castings
(Figure 22). Do not
mar the sealing
surfaces;
do not break pieces
out
of the adapter
or volute
- the castings
are easily
damaged
Figure
19
7.
To reduce
the chance
of dropping
the pump
onto
your foot, lay it down
on the bench;
block it so it
won't
roll.
Figure 22
12
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