HORIZONTAL CLOSE COUPLED PUMP SECTION 8
160
1. The seal seat (#125) must be installed in the
motor bracket before the bracket is installed
on the motor.
To install the seat:
a. Place the motor bracket face up on a flat sur-
face.
b. Carefully press the seat, smooth side up,
into the seat cavity of the motor bracket. To
make the installation of the seat easier, apply
a very thin coating of compatible seal lubri-
cant to the elastomer portion of the seat prior
to installation. Care must be taken not to
damage the seat face. Thumb pressure is
usually sufficient to install the seat. Make
sure the seat is installed firmly and squarely
and that it is then carefully cleaned.
2. Install the motor bracket (#84).
a. This is best done with the motor standing on
end.
b. From the motor side: If removed during dis-
assembly, thread the four (4) adjusting
screws (#33) into the mounting flanges of the
motor bracket until they are flush with the
front faces of the flanges.
c. Slide the four (4) small “O”-rings (#8) fully
onto the socket head screws (#33A).
d. Place the motor bracket (#84) on the motor.
Slide the bracket back until the feet are rest-
ing against the motor face. The orientation of
the motor bracket is not critical unless a flush
line is used. In that case, align the flush line
to meet system requirements.
e. Insert the four (4) socket head screws
(#33A) into the motor bracket holes and
thread into the motor face. Tighten securely
using a 5 mm allen wrench. Do not exceed 7
ft-lbs of torque or damage to the motor “C”-
face may occur.
3. Install rotating element (#12).
a. Tip the pump assembly over into a horizontal
position on the work area.
b. Lightly lubricate the motor shaft. Push the
rotating element, spring, and then spring
holder over the shaft. Prepare the snap ring
in thesnap ring pliers and then compress and
hold the seal spring slightly below the snap
ring groove. Install the snap ring (#4). Make
sure the snap ring is locked in the groove.
4. Install the impeller (#11).
a. Place the key (#23) in the shaft sleeve.
b. The impeller should slide on firmly, but eas-
ily, until it stops. Force should not be required
to install the impeller in the correct position.
c. The impeller hub should be facing toward the
motor.
d. Fasten the impeller using the washer (#41)
and screw(#19). Tighten the screw securely
(do not exceed 7 ft-lbs of torque), while hold-
ing the impeller stationary. The impeller
should not have any play or wobble.
5. Install the casing (#108).
a. Hand tighten four (4) studs (#5) into the cas-
ing until they are seated.
b. Lubricate and install the casing “O”-ring (#7)
onto the first step in the motor bracket.
c. Place the casing over the motor bracket
being careful not to pinch the “O”-ring. The
casing discharge should be oriented to meet
system requirements.
d. Loosely thread four (4) jam nuts (#20) onto
the casing studs.
6. Adjusting Impeller/Casing Clearance
a. Seat the casing down against the impeller
with light hand pressure.
b. Turn the adjusting screws until they just
touch the back face of the casing. The cas-
ing should not move during this adjustment.
This will determine the zero clearance posi-
tion. Set the minimum free running clearance
as follows:
1. Viewing from the back of the motor
bracket, (rear of motor) turn each
adjusting screw clockwise exactly 30° (1/
12 of a full revolution).
2. Securely tighten the four (4) jam nuts
against the adjusting nuts using a 9/16”
wrench and a 5/8” wrench, being
careful to prevent the adjusting nuts
from turning.
c. Turn the impeller clockwise and listen for any
scraping noises or interference. This may be
done by turning the impeller screw with a 10
mm socket through the inlet port (Be careful
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