Pentair MYERS Quick Prime QP50B Instructions De Fonctionnement page 7

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Models
QP50B - Single Phase
QP50B3 - Three Phase
The complete disassembly and reassembly instructions have
been itemized for simplicity sake.
At the discretion of the mechanic servicing the unit,
only those steps required to reinstate the unit to original
performance need be done.
The "exploded" view above indicates all items referred to in
these instructions.
It is not necessary to remove the suction and discharge
piping as the pump case (15) is designed so that no wear
would occur which would necessitate replacing this part.
1. Drain the pump of its liquid charge. (See Draining Pump
Instructions.)
2. Open the power supply switch contacts and remove
fuses.
3. Disconnect the electrical wiring from the motor (1).
4. Remove the four cap screws (7) which secure the pump
bracket (8) to the pump case (15).
5. The motor and bracket assembly can now be removed
from the pump case by pulling horizontally away from
the case. It may be necessary to use two screwdrivers --
opposite each other - in the provided openings between
the bracket and case bosses; pry the components apart.
The motor and bracket assembly can now be taken to a
more convenient location for disassembly if desired.
6. Remove the O-Ring (17) from the case inner neck.
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PUMP DISASSEMBLY INSTRUCTIONS
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Should repair parts need to be ordered, please furnish:
1. The part name (as indicated on the accompanying
drawing).
2. The quantity required and the item part number.
3. The unit catalog and serial numbers as shown on the
pump nameplate.
4. The motor horsepower and phase as indicated on the
motor nameplate.
7. Remove the three cap screws (13) that hold the diffuser
in place and lift off diffuser (16).
8. Holding the motor shaft with pliers, through one of the
bracket windows; remove impeller screw (12) turning
CCW with flat screwdriver.
9. Pull impeller straight off of motor shaft, being careful to
catch the shaft key.
10. The mechanical shaft seal components (9) can now be
removed from the impeller and bracket respectively.
11. Remove the four cap screws (6) which secure the bracket
to the motor; remove the bracket.
12. Remove the O-Ring (14) from the bracket neck.
The pump is now completely dismantled into its component
parts. Inspect pump parts and, if required, replace.
A new shaft seal should always be used when rebuilding a
pump. All pump parts should be cleaned thoroughly before
being reassembled.
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6827 0513