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Pump
Maintenance
marker giving wire number.
Cut the wires.
5. If the leads to the cord cap
assembly are burned, the
assembly must be replaced.
6. After stator retaining ring is
removed, turn housing upright
and
bump
on
blocks. This should jar the
stator loose and allow it to
drop out.
7. Thoroughly clean housing
before replacing new stator.
Replace stator and make all
wire connections to cord cap
assembly before replacing
housing on pump. This is
important as leads must be
tucked behind the windings
by using hands up through
rotor core.
IMPORTANT:
Use
compression
type
connectors on the wires. Do not
tape leads as oil will deteriorate
the tape and cause damage to
stator and bearings.
8. Check top bearing. If clean and
does not turn rough, bearings
can be reused and it is not
necessary
to
dismantle pump to change
bearings. If bearings are
damaged with dirt or heat,
they must be replaced. See
additional
instructions
replacing seals and bearings.
Remember to reinstall the
upper bearing load spring.
9. Replace stator housing onto
seal chamber and bolt in place.
Be sure O-ring seal has been
replaced. If O-ring is nicked
or cut, replace with new ring.
6
This applies to all O-rings used
in assembly.
10.After all leads are reconnected,
make a high voltage ground
test on each wire. The only
wire that should show ground
is the green power lead.
11.Refill motor chamber with oil.
Use only high grade transformer
oil or regular Hydromatic
special submersible oil. Fill
chamber until oil covers top
hardwood
of windings. Leave air space
in top for expansion. Use
Permatex on plug threads.
Replacing Seals and Bearings
1. Drain all oil from motor
chamber as described.
2. Remove bolts that hold motor
housing to pump housing.
Remove screws holding seal
plate to motor housing.
3. Lift rotating assembly (rotor,
shaft and impeller) from pump
case and place horizontally on
bench. With hardwood block,
only
tap end of impeller to loosen
insulated
from shaft.
4. Shaft sleeves are not used.
5. Remove lower seal spring and
pry out seal with screwdriver.
6. Use bearing puller to remove
bearings. Replace with new
bearings. Press only on inner
face
replacing. Pressing on outer
completely
face can damage the bearing.
Bearings are standard size
that can be obtained from
any bearing supply house
or can be obtained from
on
Hydromatic factory.
7. IMPORTANT: Do not use
any of the old seal parts.
Replace with all new seals.
8. Thoroughly clean all castings
before replacing seals. One
grain of dirt between the seal
faces
of
bearing
when
can
cause
failure.
Examine all O-rings for nicks
before reusing.
9. Use Locktite on socket head
locking screw in end of shaft.
10.Before refilling chamber with
oil, air test as described above.
11.Refill chamber with oil as
described above.
12.Always check all leads with
high voltage or with Megger
for grounds before operating
the pump.
Pump
Troubleshooting
Below is a list of common
problems
and
the
causes:
Pump will not start
1. No power to the motor.
Check for blown fuse or
tripped circuit.
2. Hand-Off-Auto switch may be
in the Off position.
3. Control circuit transformer
fuse may be blown.
4. Overload relay on starter may
be tripped. Push to reset.
Pump will not start and
overload heaters trip
1. Turn off power and check
motor leads with Megger or
ohmmeter for possible ground.
2. Check resistance of motor
windings.
All
should show close to the
same reading.
3. If no grounds exist and the
motor windings check OK,
remove pump from sump
and check for clogged or
blocked impeller.
probable
3
phases
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