6
not allowing the bubbles to rise to the water surface.
If it is not possible to leak test the pump using the submersion
method, a regulated air supply with a (0-15 PSI) air gage can be
installed in the fill holes. Stabilize the pressure inside the pump to
9 PSI. After removing the air supply, the pressure should not drop
more than 1/2 PSI in a 24 hour period.
Note: When leak testing the lower seal chamber, the lower seal
(41) must be in place and tension on the spring to the point the
impeller would hold it.
5. Install seal ring (38) on the seal retainer (40).
6. Press the seal retainer (40) into the bearing housing (34)
and secure with the four socket head screws (39).
Note: Make certain that the seal retainer (40) is centered so that
the ceramic seal is not in contact with the shaft.
7. Install the seal seat and rotating section of the lower rotary
seal assembly (41) into the seal housing (40) in the same
manner described in steps 2 and 3 above.
8. Position the unit so that the seal retainer (40) is up. Fill
the cavity behind the seal retainer (40) with an antiwear,
non-detergent, rust inhibiting, paraffinic oil of approximately
100 SUS. (See table below for acceptable types of oil.)
Refiner
Product Name
Arco
Duro 32
Exxon
Teresstic 32
or acceptable equal
9. Install the pipe plug (27) in the seal retainer (40).
F. Installing the impeller (42)...
1. Install the spring of the lower rotary seal (41), on the
exposed end of the rotor/shaft.
Note:
Spring holder not required on lower rotary seal.
2. Install the square key (30) in the groove in the shaft.
3. Install the impeller (42), impeller washer (43), lock washer
(44), and secure the impeller by immobilizing it using a
pipe wrench to grip the vanes and installing the impeller
bolt (45) in the end of the shaft.
Note: Apply thread locking compound to impeller bolt (45).
4. Using waterproof rubber adhesive sealant (i.e. liquid
silicone), secure U-cup packing (46) to groove inside
suction opening of pump housing (48). Wear ring for 4”
discharge is a light press fit; no sealants required.
5. Install O-ring (47) on flange of bearing housing (34).
Attach pump housing (48) to pump with screws (22) and
lock washers (23).
6. If removed, install the pipe nipples (49) and pipe caps
(50), being sure the motor housing sits level when caps
are installed.
G. Final assembly...
1. Fill the motor housing (20) with the same oil used to fill the
seal retainer cavity in step E.8. above. Fill until oil is level
with the upper plug (20) in the side of the motor housing
(20).
WARNING
DO NOT OVERFILL
2. Install the pipe plug (21).
tubing (17) over wires, make up connections, then place
shrink tubing in proper location and shrink. Be careful not
to burn through shrink tubing. Install ground wire to motor
housing (20) with hex head screw (19).
5. Connect sensor wire assy. (11) to sensor wires per wiring
diagram using the same method and components as the
lead wires.
Note:
Tighten nuts securely.
6. Install the lead wire housing (12) in proper position on
the pump assembly, securing with the nuts (13) and lock
washers (5).
E. Installation of rotary seals (36 and 41) and seal
retainer (40)...
CAUTION
Make sure all seal faces remain free of dirt particles.
Apply a light coat of oil to seal faces before installing.
UPPER ROTARY SEAL COMPONENT
PLACEMENT DIAGRAM
(Lower rotary seal is same except impeller
hub serves as spring holder and snap ring)
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 bearing
housing (34), and using a nonmetallic sleeve press the seat
into position in the bearing housing (34).
3. Apply 80-90 weight gear oil to the shaft and to the inside
diameter of the rotating section of rotary seal. 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 (37) in groove of motor
shaft.
Leak Test
(Before oiling pump) Perform a leak test on the pump seals by
installing a regulated air supply into the oil fill holes. Both the motor
chamber and seal chamber must be checked. The pressure of the air
supply should be set at approximately 9 PSI. Submerge the pump in
clear water watching for small air bubbles around square ring seals,
rotary seal, cord connection, and oil fill plugs. NOTE: Make certain
that the pump is placed in the water so that no areas are present
that would trap air (such as the cavity around the lower rotary seal),
© Copyright 2019 Zoeller
®
Co. All rights reserved.
ZEPA0194
SEAL SEAT
SPRING
SNAP RING
SPRING
ROTATING
SECTION
HOLDER
Assembly Procedures,
continued