Instructions / Assembly

Page 16
Stealth
™
Series Pumps Installation and Operation Manual
Figure 10. Diffuser and Impeller Exploded View
Backplate
Diffuser Screws with Washers (2)
Diffuser
Impeller
Mechanical
Seal
Diffuser O-Ring
Backplate
O-ring
Self Sealing Left
Handed Screw
Figure 7. Location of the Diffuser O-ring
6. Remove the motor shaft cover on the back of the
motor by twisting the hex-head screw with a 90°
crescent wrench (See Figure 5). The motor shaft
will be exposed.
7. Hold the exposed motor shaft with a ½" wrench
while removing the impeller center screw using a
No. 3 Phillips screwdriver. See Figure 9.
NOTE The impeller center screw is a left-hand
threaded screw. Therefore, turn the screw
clockwise to loosen.
8. Hold the motor shaft with a ½" wrench while
unscrewing the impeller from the motor shaft with
your hand.
NOTE The impeller is a right-handed thread, therefore
turn the impeller counter-clockwise to unscrew.
9. Inspect the impeller and diffuser for signs of
rubbing and/or damage.
6.2.3 Impeller Replacement
1. Press the new carbon face seal half (see Figure
11) on the motor shaft using a twisting motion.
Make sure the carbon surface is facing toward the
ceramic ring in the backplate.
CAUTION
VERY IMPORTANT! Grasp the lower portion of the
seal (opposite the carbon face) when installing the
seal, or it will be damaged.
NOTE To assist assembly, only use water and soap
solution as a lubricant. Any other lubricant will
destroy the seal after a short period of time.
NOTE Exercise great care to keep the seal and mating
parts clean.
Figure 9. Remove the Impeller
Impeller
Self Sealing Left
Handed Screw
Backplate
Mechanical Seal
Pump Body
Diffuser
Diffuser
O-ring
O-ring Location
for SHP Only
O-ring Location
for PHP/MHP Only
Figure 8. Location of the Diffuser O-ring on a
SHPF 5.0 HP Only
Pump Body
Diffuser
Diffuser
O-ring