Instructions / Assembly

Page 17
Stealth
™
Series Pumps Installation and Operation Manual
NOTE Prior to replacing the lid, check for debris
around the lid o-ring seat, as this will cause air
leaks into the system.
10. Hand-tighten the lid to make an air tight seal. Do
not use any tools to tighten the lid.
11. Open the pressure release valve on the filter, and
make sure it is clean and ready for operation.
12. Switch on the circuit breaker to the pump motor.
13. Turn on the pump and check the system for normal
operation.
14. Once all the air has left the filter, close the
pressure release valve.
6.2.4 Mechanical Seal Replacement
NOTE This is a two part replacement process. The
mechanical seal must be replaced as a set.
NOTE Refer to Figure 12 for an illustration of the
location of the mechanical seal and impeller.
WARNING
Do not damage the ceramic or carbon surfaces
of the seals. If surfaces are damaged, leaks will
occur.
1. To access the mechanical seal, follow steps 1
through 8 of Section 6.2.2, Impeller Removal.
2. Remove the carbon face seal half (see Figure 11)
from the motor shaft. This is a spring-loaded seal.
Grasp the portion of the seal closest to the impeller
body and pull the seal off using a twisting motion.
3. Remove the motor from the backplate following
the steps in Section 6.2.5, Motor Replacement.
2. While holding the motor shaft with a ½" wrench,
thread the impeller onto the motor shaft.
Hand-tighten the impeller until it is secure.
Install the impeller center screw into the center
of the impeller and tighten, using a No. 3 Phillips
screwdriver. Do not overtighten.
NOTE The impeller center screw is a left-hand
threaded screw. Therefore, turn the screw
counter-clockwise to tighten.
3. Replace the motor shaft cover by inserting the
cover tabs into the slots and rotating the cover 90º
clockwise.
4. Replace the diffuser over the impeller, using care
to insert alignment pins into the correct holes. The
molded-in arrow must point toward the handle of
the backplate.
5. Replace the two (2) small Phillips head screws.
Tighten the screws to draw the diffuser against the
motor backplate.
6. Make sure the diffuser o-ring, o-ring groove, and
o-ring seal area are clean and free of debris, which
could cause a leak. If you removed the diffuser
o-ring, install it into the groove you removed it
from (See Figure 7 and 8). If grease is used to
retain the o-ring, it must be silicone based. Do not
use petroleum-based grease. It will destroy the
o-ring.
7. Slide the diffuser into the mating hole in the pump
body. While supporting the motor, start two (2)
screws on opposite sides. This will hold the motor
in position while you start the other six (6) screws.
8. Tighten the screws lightly in a crossing “X”
pattern using a 9/16" wrench, starting with the
inner (middle) four (4) then the outer (top and
bottom) four (4) to draw the backplate to the body
in an even manner. Once all the screws are snug,
torque in the same order to 18 foot-pounds.
9. If the pump is located above water level of the
pool, remove the lid and fill the basket with water
before starting the pump.
Backplate
Mechanical Seal
Impeller
Diffuser
Self Sealing Left
Handed Screw
Screws and
Washers (2)
Diffuser O-ring
Figure 12. Backplate, Impeller, Diffuser, and
Mechanical Seal Exploded View
Figure 11. Replace the Mechanical Seal
Carbon Seal Surface
• Ceramic Face Seal
• Backplate Seal
• Carbon Face/ Spring
Side of Seal
• Impeller Side of the
Mechanical Seal