6
Pump
Maintenance
Disconnect wires and remove
connection box.
4.
After chamber is drained,
remove hold-down bolts on
motor housing and lift off. Use
care in lifting as the seal failure
connecting wire must be
disconnected before hous
ing
is completely re
moved. See
sectional drawing.
5.
The stator is held in the
housing with a bolted-in
retaining ring and pre
vent
ed
from rotating by a roll pin.
6. Remove the retaining ring and
socket head cap screw.
7. After ring is removed, turn
hous ing upright and bump on
hard
wood block. This should
jar the stator loose and allow it
to drop out.
8. Thoroughly clean housing
before replacing new stator.
Replace sta
tor and make
all wire con
nec
tions to
con nec tion
box
before
re
plac
ing housing on pump.
See motor lead connection
drawing. This is important as
leads must be tucked behind
the windings by using hands
up through rotor core.
IMPORTANT: Use only butt
con nec tions on the wires.
Do not tape leads as oil will
de te ri o rate the tape and cause
dam age to stator and bearings.
9.
Check top bearing. If the
bearing is clean and does not
turn rough, bearings can be
reused. If bear
ings are
damaged with dirt or heat,
they must be replaced. See
ad di tion al
instructions
on
re plac ing seals and bearings.
10.Replace stator housing onto
seal chamber and bolt in
place. Be sure seal failure
wires are con
nect
ed before
housing is as sem bled.
Be sure O-ring seal has been
re placed. If O-ring is nicked or
cut, replace with new ring.
This ap plies to all O-rings used
in as sem bly.
11.After all leads are reconnected
in the con nec tion 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 head in the aux
il
ia
ry
control cable.
12.For safety, complete pump
should be air checked under
water for leaks.
Install air valve in plug
opening of motor housing and
charge housing with about 10
psi of air. Be sure air is dry. Do
not use air line where water
may be trapped in the line.
Submerge com plete unit un der
water and check for leaks. If
seals were okay, refill seal
cham
ber with oil. Lay pump
on side for this oil filling with
oil fill hole upright. Do not
completely fill; leave oil about
1" below plug hole. Use only
Hydromatic sub mers ible oil or
high grade trans
form
er oil in
this chamber. Re
place plug;
use Permatex on threads.
13.Refill motor chamber with
oil through con
nec
tion box
opening. Use high grade,
non-syn thet ic
trans form er
oil or Hydromatic spe
cial
sub mers ible oil. Fill hous ing
until oil covers top of
wind
ings. Leave air space in
top for expansion.
NOTE: Oil must cover top
of stator.
Replacing Seals and Bearings:
1.
Drain all oil from motor
chamber and seal chamber
as described.
2.
Remove motor housing as
de scribed in re plac ing stator.
3. Remove bolts that hold bearing
housing to volute. Lift bearing
housing and rotating unit off
and set assembly on its side.
Remove socket head screw and
washer at the impeller end of
the shaft. Hold
ing the shaft
stationary, re move the impeller
from the shaft by tap ping the
end of the impeller blades.
4. To remove seal plate take out
sock et head screws and using
screws in back-off holes pry
plate loose. This will also force
seal off if not already removed.
5. Remove snap ring. Pull seal
if it is free. If not free, it
can be forced off when shaft
is removed.
5A.The flame ring must be
removed. It is recommended
Hydromatic Kit #51700-900-7
be used to ease its removal.
This kit will include a pusher
to reassemble in re
place
ment
of flame ring.
6. Set seal housing in upright
po si tion and bump end of shaft
on hard wood block. This will
push the bearing from the
housing and will force upper
seal from shaft.
7. Use bearing puller to remove
bear
ings. Replace with new
bear
ings. Press only on
inner face of bearing when
replacing. Pressing on outer
face can damage the bear ing.
Bearings are stan
dard size
that can be obtained from
any bearing sup
ply house
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