8
Pump
Maintenance
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 the 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, un screw
the impeller from the shaft
by tapping 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.
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 or can be obtained
from Hydromatic factory.
8.
iMPortANt:
Do not use
any of the old seal parts.
Replace with all new seals.
Note: Any time seal is
disturbed, replace seal.
9. Thoroughly clean all castings
be fore re plac ing seals. One
grain of dirt between the seal
faces can cause failure.
10.Examine all O-rings for nicks
be fore re us ing.
11.Use
Locktite
(red)
on
socket head locking screw in
end of shaft.
12.Before refilling chamber with
oil air test as described in
replacing stator.
13.Refill both chambers with oil
as described in replacing stator.
14.Always check all leads with
high voltage or with Megger
for grounds before operating
the pump.
15.Check pump for proper
rotation before re turn ing to
normal service.
Summary of Contents for S4NX
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