new parts will cause immediate
seal failure.
5. When cleaning all parts before
replacement, check to be sure
sleeve bearing or shaft is not
worn. Be sure all “O” rings are
in excellent condition without
cuts or nicks, and replace them
if not in excellent condition.
Use “O” ring lube to prevent
cutting at assembly.
6. After upper seal is replaced we
recommend an air test be made
by inserting 5 lbs of air
pressure into the motor
housing and allow ample time
for air to escape. If pressure
remains steady for five
minutes continue by replacing
lower seal plate, lower shaft
seal, and impeller. Repeat the
air test in the seal chamber.
If this test is satisfactory
complete the assembly as
described earlier. Next the
pump must be filled with oil.
Start by filling the seal
chamber. Do not fill completely.
Allow about
1
⁄
2
inch air space
for expansion. Next fill the
motor housing just above the
motor winding.
7. Use only HYDROMATIC
submersible oil in motor
chamber and seal chamber. In
an emergency, a high grade
transformer oil can be used
in the motor chamber and
#20 non-detergent automobile
oil can be used in the
seal chamber.
Replacing Motor Stator:
1. If necessary to replace stator,
completely dismantle pump as
described above.
2. Drain all oil from upper
housing. Remove drain plug
(11) in bottom of bearing
housing, and remove bearing
housing (26) and rotor and
shaft assembly (32), making
note that a wave washer (35) is
used on the top of the upper
bearing (34).
3. Place motor housing vertically
on the bench and remove the
hex head screws (2) and
remove the power cord (1)
from the pump, making sure
that the wires are not
damaged. Clip the power cable
leads, taking note of the wire
connections, and then remove
the power cable.
4. Turn the motor housing over
and remove the stator bolts
(29) from the stator (31), then
remove the stator from the
motor housing (33).
5. Place new stator (31) into the
motor housing (33) while
pulling the new leads through
the power cord opening in the
motor housing. Replace the
stator bolts (29) and tighten.
Replace the seal sensor wire
(9) along the side of the stator.
6. Attach the power cord (1) to
the stator (31) leads and the
sensor leads using insulated
butt connector (4). Once
attached, carefully tuck the
wires into the motor housing
making sure that they will not
come in contact with the rotor.
Replace the power cord
assembly end into the motor
housing (33) and replace the
hex head screws (2) and
tighten. Make sure O-ring (3)
is in place on power cord
assembly
flange
before
connecting stator (31) wire
leads with butt connectors (4)
to the power cord (1) leads.
7. Examine the bearings (34)
and (36) on the shaft/rotor
assembly (32). If when rotated
they feel rough, replace. When
reinstalling new bearings, press
on the inner ring of the bearing
only or damage may occur.
8. Replace the wave washer (35)
into the upper bearing pocket
in the motor housing (33),
then reinstall the rotor and
shaft assembly (32).
9. Follow the previously outlined
steps to reassemble the pump
from this point.
10.Always run pump for a
few seconds after assembly
work to be sure all parts run
smoothly before replacing it in
the sump. Check again for
correct rotation. Pump should
rotate counterclockwise when
viewed from the suction end.
NOTE: When applying power,
be sure the pump is restrained
from turning by holding the
pump at the motor housing, or
by clamping it in a holding
fixture.
WARNING: Severe injury may
result from accidental contact
with moving cutters. Keep
clothing, hands and feet away
from cutters any time power is
connected to the pump.
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