Pentair MYERS Quick Prime QP50B Instructions De Fonctionnement page 8

1. With motor in vertical position (shaft extension end up)
place bracket onto motor face register.
2. Secure bracket to motor with four cap screws (6). Insure
that the motor, when in operating position, has the shell
air slots in the down position.
3. Place stationary shaft seal component (9) over pump
shaft extension and seat into provided bracket bore. (Use
finger pressure to press this seal component firmly and
squarely until it bottoms.) Follow with the rotating seal
component onto the motor shaft. Be sure the lapped
sealing surface is toward the seal seat. The use of a
light oil (SAE 10) on the rubber elements will facilitate
assembly.
It should be emphasized that extreme cleanliness and
care are required for proper seal assembly. Should
the seal faces be damaged during assembly (cracked,
scratched or chipped) the seal will surely leak during
operation. Make sure 3/16 square key does not slide
back away from impeller.
4. Slide the impeller (10) onto the pump shaft extension
until the impeller back hub butts the shaft shoulder.
Screw in impeller cap screw (12) with O-Ring (11).
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Models
QP50B - Single Phase
QP50B3 - Three Phase
PUMP ASSEMBLY INSTRUCTIONS
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3
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9
5. Place the diffuser (16) over the impeller with the diffuser
volute face against the bracket, be sure the word ''top"
on the diffuser is in the proper position. Equally space
three .005 shims between the impeller hub and the
diffuser I. D. (This will center the diffuser in relation to
the impeller.) Assemble the three W' cap screws (13)
and tighten alternately, so the diffuser is not pulled to
one side. Snug up screws securely - do not overtighten.
Remove the three shims and as the impeller is revolved it
should turn freely.
6. Place gasket (14) over the bracket register diameter and
position against the provided face.
7. Place gasket (17) over the inner neck in the pump case
and place against the provided shoulder.
8. The assembly can now be reassembled to the pump
case.
9. Using four cap screws (7) secure bracket to case. (20 ft.-
lbs. of torque. Do not overtighten.)
10. The motor wiring can now be connected and the unit
reprimed. (See Priming Instructions.)
11. Install the previously removed fuses from the entrance
switch and close the switch; the unit is now in operation
again.
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