6
Pump
Maintenance
from pump without dis turb ing
seals or bear ings.
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
re move cord cap assembly by
removing bolts. When this is
lift ed off, con nec tion wires to
motor will be exposed. These
wires will prob a bly be burned,
but each wire is tagged with
a metal marker giv ing wire
num ber. Cut the wires.
5. If the leads to the cord cap
as sem bly are burned, the
cord cap assembly must be
re placed.
6. After stator retaining ring is
re moved, turn hous ing upright
and bump on hard wood blocks.
This should jar the stator loose
and al low it to drop out.
7. Thoroughly clean hous ing
before re plac ing new stator.
Replace sta tor and make all
wire con nec tions to cord cap
assembly before re placing
hous ing on pump. This is
im por tant as leads must be
tucked be hind the wind ings
by us ing hands up through
ro tor core.
IMPORTANT: Use only
compression type insulated
con nec tors on the wires. Do not
tape leads as oil will de te ri o rate
the tape and cause dam age to
stator and bear ings.
8. Check top bearing. If clean
and does not turn rough,
bearings can be re used and it
is not necessary to com pletely
that a light ning arrestor be
installed at the con trol panel.
Complete data on lightning
arrestors and cost are avail able
from the factory. Light ning ar restors
are good in sur ance against
damage to an ex pen sive motor.
Servicing Instructions:
IMPORTANT: Read all
in struc tions be fore replacing
any parts.
WARNING: Before han dling
these pumps and controls, always
dis con nect the power first.
Do not smoke or use sparkable
elec trical devices or flames in
a sep tic (gas eous) or possible
septic sump.
Field Service on Motor:
All submersible motors can be
ser viced (out of warranty) in the
field by any reliable motor service
shop. Any pump (in warranty)
must be re turned to the factory
for ser vice or repaired at an
au tho rized Hydromatic service
center. Charges will not be
al lowed if (in war ran ty) pump
is not taken to an authorized
Hydromatic service cen ter.
When field service is per formed
on a pump, these in struc tions
should be care ful ly followed.
Replacing Stator:
1. If stator only is damaged,
it may not be necessary to
completely dis mantle pump as
stator and hous ing can be lift ed
dismantle pump to change
bearings. If bearings are
dam aged with dirt or heat,
they must be re placed. See
ad di tion al instructions on
re plac ing seals and bearings.
Re mem ber to reinstall the
upper bear ing load spring.
9. Replace motor hous ing onto
seal cham ber and bolt in place
with capscrews.
Be sure O-ring seal has been
re placed. If O-ring is nicked or
cut, re place with new O-ring.
This ap plies to all O-rings used
in as sem bly.
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 trans former
oil or reg u lar Hydromatic
spe cial sub mers ible oil. Fill
cham ber until oil cov ers top of
wind ings. Leave air space in top
for ex pan sion. Use Permatex
®
on plug threads.
Replacing Seals and Bearings:
1. Drain all oil from motor
chamber as described.
2. Remove bolts that hold motor
hous ing to bearing housing.
Re move screws hold ing
bearing housing to volute
housing.
3. Lift rotating assembly (rotor,
shaft and impeller) from pump
case and place hor i zon tal ly on
bench. With hard wood block,
tap end of im pel ler 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.
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