
7
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 a 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
Hydromatic submersible oil
in this chamber. Replace plug;
use Permatex on threads.
Install air valve in top 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 complete unit
under water and check for
leaks.
12. Refill motor chamber with oil.
Use high grade transformer
oil or 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 and seal chamber
as described.
2. Remove motor housing
as described.
3. Remove bolts that hold seal
chamber to pump housing.
Use back-off screws to
break loose. With hardwood
block, tap end of impeller to
loosen from shaft. When free,
remove impeller from shaft.
4. Lift rotating assembly (rotor,
shaft and impeller) from pump
case and place horizontally
on bench.
5. Impeller removal – Hold
motor and remove bolt and
washer from impeller end of
shaft. Impeller is threaded
to the shaft, so tap face of
impeller with hardwood block
to free threads. Holding rotor,
turn impeller with hardwood
block to free threads.
Holding rotor, turn impeller
counterclockwise as thread is
right-hand.
6. Remove lower seal spring and
pry out seal with screwdriver.
7. To remove seal housing, take
out socket head bolts and
using bolts in back of holes,
pry plates loose. This will
force out lower seal if not
already removed.
8. Remove snap ring that holds
upper seal. Pull seal if it
is free. If not free, it can
be forced off when shaft is
removed.
9. Remove 4 bolts that hold
bearing housing in place. Set
assembly in upright position
and bump end of shaft on
hardwoodblock.Thiswillpush
the bearing from the housing
and will force upper seal
from shaft.
10. Use bearing puller to remove
bearings. Replace with new
bearings. Press only on
inner face of bearing when
replacing. Pressing on outer
face can damage the bearing.
IMPORTANT: Do not use
any of the old seal parts.
Replace with all new seals.
11. Thoroughly clean all castings
before replacing seals. One
grain of dirt between the seal
faces can cause failure.
12. Be sure seal washers are
replaced under heads of 4
bolts that hold bearing cap in
place. Examine all O-rings
for nicks before using.
13. Be sure key is in place in
notch of shaft sleeve to
prevent sleeve from turning.
14. Use Locktite on socket head
locking screw in end of shaft.
15. Before refilling chamber
with oil, air test as described
above.
16. Refill both chambers with oil
as described above.
17. Always check all leads with
high voltage or with Megger
for grounds before operating
the pump.