8
Pump
Maintenance
13.Refill motor chamber with oil.
Use high grade trans form er
oil or Hydromatic special
sub mers ible 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 hous ing as
de scribed.
3. Remove bolts that hold seal
cham ber to pump hous ing. Use
back-off screws to break loose.
With hardwood block, tape 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 hor i zon tal ly 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. Shaft sleeves are not used.
7. Remove lower seal spring and
pry out seal with screwdriver.
8. To remove seal hous ing, 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.
9. Remove snap ring that holds
upper seal. Pull seal if it is free.
If not free, it can be forced off
when shaft is re moved.
10.Remove 4 bolts that hold
bearing housing in place. Set
assembly in upright po si tion
and bump end of shaft on
hardwood block. This will
push the bearing from the
hous ing and will force upper
seal from shaft.
11.Use bearing puller to remove
bearings. 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 standard size that can be
obtained from any bearing
supply house or can be obtained
from Hydromatic factory.
12.IMPORTANT: Do not use
any of the old seal parts.
Replace with all new seals.
13.Thoroughly clean all castings
before replacing seals. One
grain of dirt be tween the seal
faces can cause failure.
14.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.
15.Be sure key is in place in notch
of shaft sleeve to pre vent
sleeve from turning.
16.Use Locktite® on sock et head
locking screw in end of shaft.
17.Before refilling cham ber with
oil, air test as de scribed above.
18.Refill both chambers with oil
as described above.
19.Always check all leads with
high voltage or with Megger
for grounds before operating
the pump.
Summary of Contents for S
Page 15: ......