6
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located in the middle of the mounting ring.
4.. The rotary seal (Ref. No. 5) will come loose at this
time. Use a screwdriver (or similar instrument) to
pry the ceramic seal and rubber gasket from the
recess of the mounting bracket.
CAUTION: Be careful not to damage the motor shaft
or recess surface.
5. Clean the recess and motor shaft thoroughly.
6. Install the new rotary seal assembly:
a. Insert the ceramic seal and the rubber gasket
into the recess.
NOTE: To help facilitate installation, apply a drop
of liquid soap to the outside diameter of the rubber
gasket. Make certain that the ceramic seal is kept
clean and free of dirt and/or oil.
b. Slip the remaining parts of the rotary seal
assembly onto the motor shaft.
7. Replace the impeller and diffuser removed in
Step B and C.
8. Reassemble the pump body to the motor and
mounting bracket.
MOTOR REPLACEMENT
1. NEMA J motors can be replaced in the field
with any standard NEMA J jet pump motor by
referring to the following instructions and the
attached parts list.
2. Follow steps A-D as outlined under rotary seal
replacement to remove the pump body, diffuser,
impeller and rotary seal.
3. Remove bolts (Ref. No. 3) that connect the
motor (Ref. No.1) to the mounting ring (Ref. No.
2) and pull motor away.
4. Replace motor with standard NEMA J jet pump
motor by positioning motor against the mounting
frame and assembling with four 3/8” x 3/4” cap
screws. The mounting base is connected at the
bottom of the mounting frame with two 3/8” x
1/2” cap screws.
5. Follow steps 5, 6, 7 & 8 of Rotary Seal Assembly
to reassemble the remainder of the pump.
NOTE: Because damage to the shaft seal is most
likely to occur in disassembly, a new seal will be
necessary.
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