
6
Pump
Maintenance
from pump without disturbing
seals or bearings.
2. Drain all oil from upper housing.
If oil is clean and no water
is
present, seals can be considered
satisfactory to reuse.
3. After chamber is drained,
remove hold-down bolts and
lift off motor housing. Use
care in lifting.
4. Set assembly on bench and
remove cord cap assembly by
removing bolts. When this 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.
5. If the leads to the cord cap
assembly are burned, the
cord cap assembly must be
replaced.
6. After stator retaining 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 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 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
that a lightning arrestor be
installed at the control panel.
Complete data on lightning
arrestors and cost are available
from the factory. Lightning arrestors
are good insurance against
damage to an expensive motor.
Servicing Instructions:
IMPORTANT: Read all
instructions before replacing
any parts.
WARNING: Before handling
these pumps and controls, always
disconnect the power first.
Do not smoke or use sparkable
electrical devices or flames in
a septic (gaseous) or possible
septic sump.
Field Service on Motor:
All submersible motors can be
serviced (out of warranty) 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.
Replacing Stator:
1. If stator only is damaged,
it may not be necessary to
completely dismantle pump as
stator and housing can be lifted
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 motor housing onto
seal chamber and bolt in place
with capscrews.
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,
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 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 bearing housing.
Remove screws holding
bearing housing to volute
housing.
3. Lift rotating assembly (rotor,
shaft and impeller) from pump
case and place horizontally on
bench. With hardwood block,
tap end of impeller to loosen
from shaft.
4. Remove lower seal spring and
pry out seal with screwdriver.
5. Remove screws holding seal
plate to bearing housing, then
remove snap ring that retains
the upper seal and pry out seal
with screwdriver.