
6
Replacing Stator:
1. If stator only is damaged
it may not be necessary to
completely dismantle pump
as stator and housing can be
lifted from pump without
disturbing seals or bearings.
2. Drain all oil from upper
housing, remove from upper
housing, remove drain plug in
bottom of stator housing and
remove plug in top of housing
to allow air to enter.
3. After chamber is drained,
remove hold-down bolts and
lift off. Use care in lifting
as the seal failure connecting
wire must be disconnected
before housing is completely
removed.
4. Set assembly on bench and
remove connection box.
When box is lifted off,
connection wires to motor
will be exposed. These wires
will probably be burned, but
each wire is tagged with a
metal marker giving wire
number. Cut the wires.
If the leads to the connection
box are burned, a complete
new connection box with new
wire must be used. The wires
are potted in with sealing
compound and a new unit
must be obtained from the
factory.
5. The stator is held in the
housing with a bolted-in
clamp ring.
6. After ring is removed turn
housing upright and bump on
hardwood 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 connection box before
replacing housing on pump.
If seal failure is not used, the
pump should be lifted once every
two years and the oil be drained
from the seal chamber to check
for water.
If the pump is used on a
HYDR-O-RAIL system, it
should be lifted once every six
months and checked for corrosion
and wear.
Generally these pumps give very
reliable service and can be expected
to operate for years on normal
sewage pumping without failure.
Lightning:
In some areas where considerable
lightning occurs, it is recommended
that a lightning arrestor be
installed at the control panel.
Complete data on lightning
arrestors and cost is available
from the factory. Lightning arrestors
are good insurance against damage
to an expensive motor.
Field Service on Motor:
All submersible motors out of
warranty can be serviced in the
field by any reliable motor service
shop. Any pump (in warranty)
must be returned to the factory
for service or repaired at an
authorized Hydromatic service
center. Charges will not be
allowed if (in warranty) pump
is not taken to an authorized
Hydromatic service center.
When field service is performed
on a pump these instructions
should be carefully followed.
This is important as leads
must be tucked behind the
windings by using hands up
through rotor core.
IMPORTANT: Use only
compression type insulated
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 completely
dismantle pump to change
bearings. If bearings are
damaged with dirt or heat
they must be replaced. See
additional instructions on
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 seal failure wire
is connected before housing
is assembled.
Be sure O-ring seal has been
replaced. If O-ring is nicked
or cut, replace with new
O-ring. This applies to all
O-rings used in assembly.
10. After all leads are reconnected
in the connection box, make
a high voltage ground test
on each wire. The only wire
that should show ground is
the green power lead and the
ground lead in the auxiliary
control cable.
11. For safety, complete pump
should be air checked under
water for leaks. Lay pump
on side for this oil filling
with oil fill hole upright. Do
not completely fill; leave
oil about 1 inch below plug
hole. Use only high grade
transformer oil or regular
Pump
Maintenance