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®
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Assembly Procedures
A. Installing the sensor studs (17)...
1. Apply oil to threads of sensor studs (17).
2. Apply oil into threaded holes in adapter (19).
3. Screw sensor stud (17) into adapter (19) apply 34 in/lbs. of torque.
B. Assembly of rotor (14)...
1. Inspect rotor to see that the snap ring is in place and snapped in the groove.
This snap ring serves as a locator for the lower bearings.
NOTE: Before installing the bearing, wipe the bearing seats on the shaft clean
and coat the seats with oil to prevent galling of the shaft as the bearings are
pressed onto the shaft. A properly sized pressing sleeve should be used to install
bearings, with pressure being applied to only the inner bearing race.
2. Install the lower ball bearing (16) and the upper ball bearing (13) on the
rotor shaft (14). See lower angular contact bearing instruction page 6 for
bearing orientation.
3. Set the adapter (19) on blocks to allow the rotor shaft to clear the work
surface when installed.
4. Install the rotor/bearings assembly into the adapter housing (19). Make
sure the lower bearing is seated in the bearing pocket.
C. Installing the motor housing/stator (12)...
NOTE: The motor housing/stator assembly is furnished from the factory as a
glued in unit. The assembly will include the motor housing, the stator prewired
to installed through wall terminals (10) and moisture sensor wires (41).
1. Lightly oil and position the seal ring (18) around the pilot shoulder of the
adapter (19).
2. Install the pre-load washer (38) in the upper bearing pocket of the housing/
stator unit (12). The pre-load washer should be stretched a little to allow it
to remain in the pocket when turned upside down.
3. With the rotor/adapter assembly in the vertical position suspend the motor
housing/stator unit over it. Slowly lower the unit aligning the rotor and stator
opening. Plug the moisture sensor wires (39) onto the sensors (17) at this
time.
4. Tuck the moisture sensor wires away from the rotor while lowering the motor
housing/stator unit into place on the adapter.
5. Secure the motor housing/stator (12) to the adapter (19) with four screws
(2) and four lock washers (3). Torque screws to 175-195 in/lbs.
NOTE: The small arrow heads on housing flanges are to be aligned for proper
orientation.
D. Installing cord and cover assembly...
NOTE: The cords will come from the factory as a cords and clamp assembly (6).
The assembly consist of the power cord, the sensor cord, the wire terminals, the
clamp and the potting compound between the cords and clamp.
1. Unroll the cords of the cord and clamp assembly (6) and slide the cord seal
(5) down the cords to the clamp.
2. From the inside of the cover (4) place the cords of the assembly (6) through
the holes and pull through the top.
3. Push the cord seal (5) into it’s pocket inside the cover (4). Push the clamp
(6) tight against the seal.
4. Apply thread locker compounds to the screws (8) and install into clamp
along with lock washers (7). Using a cross pattern tighten the screws to the
seal clamp evenly. Torque screws to 69-72 in/lbs.
5. Apply thread locker compound to ground screw and install ground wires to
cover.
6. Lightly oil and install seal ring (9) on shoulder of cover (4).
7. Suspend the cord and cover assembly over the motor housing and make
wiring connections per the proper wiring diagram.
NOTE: The power wiring goes to the numbered terminal, the moisture sensor
to M1 and M2 and the thermosensor to T1 and T2.
8. Tuck the wires in the cover assembly as installing the cover into place.
9. Secure the cover (4) to the motor housing (12) with four screws (2) and
four lock washers (3). Torque screws to 175-195 in-lbs.
NOTE: The small arrow heads on the castings are to be aligned for proper
orientation.
E. Installation of rotary seals and seal retainer
CAUTION
Make sure all seal faces remain free of dirt particles.
Apply a light coat of oil to seal faces before installing.
1. Refer to rotary seal component placement diagram for relative
positioning of seal parts.
2. Apply a coating of oil to the seal seat and the bore of the adapter
(19), and using a nonmetallic sleeve, press the seat into position in
the adapter.
ROTARY SEAL COMPONENT PLACEMENT
DIAGRAM
3. Apply 80-90 weight gear oil to the shaft and to the inside diameter of
the rotating section of rotary seal (20). Push the rotating section onto
the shaft in a continuous motion until the seal faces meet.
4. Install the spring and spring holder over the shaft and seat against the
rotating section. Compress the spring as necessary and install retaining
ring (21) in the groove of the rotor shaft.
5. Lightly oil and install seal ring (18) on the seal retainer (23).
6. Press the seal retainer (23) into the adapter (19) and secure with the
four socket head screws (22).
7. Install the seal seat and rotating section of the lower rotary seal assembly
(24) into the seal retainer (23) in the same manner described in steps 2,
3, and 4 above.
F
. Installing the impeller...
1. Install the proper number of impeller shims (25) on the shaft to give the
face of the impeller (26). The proper running clearance from the pump
housing (28). (See impeller clearance diagram on page 3.)
2. Install the square key (15) in the groove in the shaft.
3. Install the impeller (26).
G. Installing the pump housing (28)...
1. Lightly oil and install the seal ring (27) on the adapter (19).
2. Install the pump housing (28) on the adapter (19). Securing it with the
four screws (2) and lock washers (3).
3. Torque screws to 175-195 in/lbs.
Note: Cutter plate and cutter can be replaced with new service parts or
resurfaced by grinding. Resurfacing is accomplished by surface grinder
both cutter plate and cutter to a 32 micro finish. Do not attempt grinding in
the field. Send parts to a qualified machine shop or return to the factory for
repair. The cutter plate and cutter shims are a matched set. Keep parts
together. Measure disc before and after resurfacing, the cutter plate and
cutter must be flat within 0.001". If the plate has been surface ground, it
will be necessary to remove shims to compensate for the material removed
SEAL SEAT
SPRING
SNAP RING
SPRING
ROTATING
SECTION
HOLDER
ZEPA0194
