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Maintenance
7. Attach clamp ring (8) to seal plate (9) and secure
with machine screws.
8. Install impeller (10) onto the pump shaft. On 3ø
models fasten the impeller washer with the impeller
screw to the pump shaft.
9. Turn impeller (10). It should turn freely with no drag.
10. Place motor/seal plate assembly into the volute
case (11).
11. Place the new O-ring (6) over the seal plate shoulder.
12. Clean motor housing assembly and connect power
cord into cord entry of motor housing.
13. Connect power cord wires to motor connections and
then slide motor housing assembly over motor.
14. Secure motor housing to volute case with three hex
head screws (7).
15. Reach in the eye of the volute (11) and turn impeller
(10) again. It should turn freely with no drag.
16. Before filling the motor housing with oil, a seal leak
test should be performed. Apply 7 to 8 pounds of
air pressure in the 1/4" NPT tap (3) on the top of the
motor cover and seal chamber.
NOTICE Too much pressure will damage the seal.
Seal would have to be replaced.
Then submerge the pump in water and check for
leaks. If a leak occurs, isolate where it is coming
from and correct the problem by replacing the
failed part.
7. Hydromatic pumps have a small air vent hole in
the impeller cavity to let out trapped air. If this hole
becomes plugged, pump may air lock. To break the
air lock, use a small screwdriver to clear hole in the
impeller cavity.
As a secondary precaution in installations of this
type, an 1⁄8" hole should be drilled in the discharge
pipe just above the volute. The check valve should
be at least 12 inches above pump discharge. Do
not put check valve directly into pump discharge
opening.
NOTICE In sumps where the pump is operating
daily, air locking rarely occurs.
Oil fill
1. After seal leak test is satisfactory, remove unit from
water and wipe or blow off any excess water.
2. Do not put oil in motor with any water present in
motor cavity.
3. Use refined paraffinic transformer oil, ¹Shellflex™
2210 or equivalent.
¹ Shell Oil Company, Texas
4. Slowly fill oil to 1/8" over windings in motor housing
through opening (3). Use an oil fill tube that will go
into holes so that air can escape. Replace plug (3).
NOTICE Do not fill the motor housing completely –
allow air space for expansion.
5. Connect power cord wires to terminals in panel, or
connect power source, and check pump running.
Motor should run smoothly and be free of vibration.
Pump is ready for operation.
8
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