Pentair Hydromatic SP40 Manual De Funcionamiento E Instalacion página 6

MAINTENANCE
11. Remove seal: Remove the old stationary portion of the seal
(7) from the seal plate by inserting a screwdriver into the
seal housing of the seal plate from the top of the case and
tapping lightly with a hammer. Clean the seal area of the
seal plate (8) with a clean cloth.
12. Reinstall the rotor and shaft assembly: Push on outer face
to seat bearing in seal plate.
13. Reinstall seal: Apply a good lubricant to the new stationary
portion of the seal (7) and press into the seal plate. Coat
the new rotating portion of seal withlubricant and press
into place on the rotor shaft with the rubber ring facing the
impeller.
14. Reinstall impeller: Add a drop of Locktite 222 to the shaft
and screw the impeller on hand tight. The impeller will force
the rotating portion of seal into position.
15. Replace seal ring: Remove the old square seal ring from
the seal plate and stretch on a new ring coated with O-ring
lube.
16. Do not roll the ring onto the seal plate or improper seating
and water leakage into the motor housing will result.
17. Reinstall the stator: Place the stator (4) in the seal plate
(8) so the stator bolt holes line up. Lay the stator plate on
the stator (4) and line up with stator bolt holes. Put in the
stator bolts and tighten evenly to prevent cocking of the
stator. Connect the capacitor to the capacitor leads. Push
the connectors of the two black stator leads onto the power
cord spade terminals.
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18. Reassemble pump: Replace the motor cover (3) on the
seal plate (8). Place the assembly on the volute (9). Insert
the four cap screws (6) through the motor housing ears,
into the tapped holes in the volute. Tighten them evenly to
prevent cocking the motor housing and causing an uneven
seal on the seal ring.
19. Oil: Fill the motor cap with high grade transformer oil just
covering over stator end cap (.45 gallon).
Do not fill the motor housing completely – allow airspace
for oil expansion. Make sure the stator and capacitor are
fully immersed. You will have to peer through the oil plug
hole to be sure of the correct oil level.
20. Reinstall oil pipe plug: Coat pipe threads with thread
sealant before installing. Plug into housing (3).
21. Check pump. Plug the power cord into a grounded
outlet and start pump by applying pressure to the switch
diaphragm (automatic only – manual should start when
power is applied). Motor should run smoothly, be free
of vibration and stop when pressure is removed from
diaphragm switch.
22. Check for air lock. Pentair 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 —
1⁄ 16" hole should be drilled in the discharge pipe below the
check valve. The check valve should be 12 to
18 inches above pump discharge. Do not put check valve
directly into pump discharge opening.
NOTE: In sumps where the pump is operating daily, air
locking rarely occurs.
HYD881 (05-26-20)